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 cylinder, a circulating filtering pipeline provided with a circulating pump, a filtering device provided on the circulating filtering pipeline and having a water inlet, a filtered water outlet and a sewage outlet, a sewage pipeline for receiving sewage discharged from the sewage outlet, and a control valve assembly. During a washing / rinsing process, the washing machine alternately performs a circulating filtering operation and a sewage discharge operation. In the circulating filtering operation, the circulating pump is in an open state, the control valve assembly is connected to the circulating pump and the water inlet and disconnected from the sewage outlet and the sewage pipeline, and water in the water containing cylinder is subjected to the circulating filtering operation. In the sewage discharge operation, the circulating pump is in a closed state, the control valve assembly is disconnected from the circulating pump and the water inlet and connected to the sewage outlet and the sewage pipeline, and sewage in the filtering device is discharged into the sewage pipeline. The washing machine alternately performs the circulating filtering operation and the sewage discharge operation, so that filtering impurities remaining in the filtering device can be timely discharged, and the filtering efficiency is not affected by the accumulation of the filtering impurities.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing machines, in particular, relates to a control method of a washing machine and the washing machine. BACKGROUND

[0002] In the process of washing clothes by the washing machine, due to the friction between clothes and clothes, and between clothes and the washing machine itself, lint will fall off from the clothes and mix into the washing water. If the lint in the washing water cannot be removed, it will be attached to the surface of the clothes after the washing is completed, which affects the washing effect of the clothes. Therefore, a filter for filtering the lint is installed on the existing washing machine, and the washing water is continuously passed through the filter during the washing process to remove the lint from the washing water.

[0003] The filter of the existing washing machine is generally arranged inside the inner tub or the drain pump, and is used for filtering the lint and sundries in the washing water. However, after the washing machine is used for a long time, the filter will be filled with the lint and sundries, which affects the filtering effect of the filter, causes the blockage of the drain valve / drain pump, and is easy to breed bacteria. Therefore, the filter needs to be cleaned in time, otherwise it will cause the pollution of the washing water and the secondary pollution of the clothes, and affects the health of the user. However, most of the washing machines need the user to take down the filter to clean it manually, which is inconvenient to operate.

[0004] Therefore, the existing technology proposes a filter device with a self-cleaning function, which can automatically clean the attached lint and other filtering impurities inside after completing the filtering process, and discharge the cleaned filtering impurities through the water flow. However, most of the washing machines perform the cleaning of the filter device and the discharge of the sewage only once after the end of the washing or rinsing stage, or even after the completion of a complete washing program of the washing machine. When the content of the lint in the water is large, the filtering impurities may cover the filter screen in the filter device, which affects the filtering efficiency of the filtering impurities. In severe cases, the filtering impurities may be blocked, which causes the circulation filtering to be unable to continue, and affects the user experience.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a control method of a washing machine and the washing machine. The washing machine alternately performs the circulation filtering operation and the pollution discharge operation during the washing / rinsing process, which can timely discharge the filtering impurities remaining inside the filter device during the execution of the circulation filtering operation, and avoids the accumulation of the filtering impurities inside the filter device to affect the filtering efficiency.

[0007] To solve the above technical problems, the basic idea of the technical solution of the present application is as follows:

[0008] A control method of a washing machine, the washing machine comprising:

[0009] a water tub;

[0010] a circulating filter pipeline, having a water inlet end and a water outlet end, and communicating with the water tub, and having a circulating pump arranged thereon;

[0011] a filter device, arranged on the circulating filter pipeline, and having a water inlet, a filtered water outlet and a sewage outlet;

[0012] a sewage pipeline, for receiving the sewage discharged from the sewage outlet;

[0013] and a control valve assembly;

[0014] the washing machine alternately performs, during a washing / rinsing process:

[0015] a circulating filter operation, in which the circulating pump is turned on, the control valve assembly is switched on the circulating pump and the water inlet and switched off the sewage outlet and the sewage pipeline, and the water in the water tub is subjected to a circulating filter operation;

[0016] and a sewage discharge operation, in which the circulating pump is turned off, the control valve assembly is switched off the circulating pump and the water inlet and switched on the sewage outlet and the sewage pipeline, and the sewage in the filter device is discharged into the sewage pipeline.

[0017] Further, during the execution of the circulating filter operation, the circulating pump is intermittently turned on;

[0018] Preferably, the circulating filter operation comprises the following steps:

[0019] S1, the control valve assembly is switched on the circulating pump and the water inlet and switched off the sewage outlet and the sewage pipeline;

[0020] S2, the circulating pump is turned on and kept on for a certain time length;

[0021] S3, the circulating pump is turned off and kept off for a certain time length;

[0022] S4, if the number of times of executing step S2 in the current circulating filter operation reaches a preset number, the circulating filter operation is ended, otherwise, the process returns to step S2.

[0023] Further, during the execution of a circulating filter operation, the circulating pump is kept on for a first preset time length T1 after being turned on for the first time, and is kept on for a second preset time length T2 after being turned on each time thereafter; the first preset time length T1 is greater than the second preset time length T2.

[0024] Further, the filter device comprises:

[0025] a filter cavity, having the water inlet, the filtered water outlet and the sewage outlet arranged thereon;

[0026] a filter mechanism, rotatably arranged in the filter cavity;

[0027] a driving mechanism for driving the filtering mechanism to rotate in the filtering cavity;

[0028] The step S3 further comprises: during the circulation pump is closed, the driving mechanism is started to drive the filtering mechanism to rotate in the filtering cavity.

[0029] Further, in the step S3, the filtering mechanism continuously rotates during the circulation pump is closed, and the duration of the continuous rotation of the filtering mechanism is the same each time the driving mechanism is started.

[0030] Preferably, in the step S2, the duration of the continuous operation of the circulation pump after being started is at least a second preset duration T2, and in the step S3, the duration of the continuous rotation of the filtering mechanism is a third preset duration T3, and the third preset duration T3 is less than the second preset duration T2.

[0031] Further, the washing machine further comprises an external drainage pipeline for draining water to the outside, and the control valve assembly is connected to the circulation pump and the external drainage pipeline when the drain port and the drain pipeline are connected.

[0032] After the washing / rinsing process is completed, the control valve assembly is connected to the circulation pump and the external drainage pipeline, the circulation pump is started, and the water in the tub is drained out of the washing machine through the external drainage pipeline.

[0033] Further, before the washing / rinsing process is started, the control valve assembly is connected to the circulation pump and the water inlet, and disconnected from the drain port and the drain pipeline.

[0034] The circulation pump is started to perform a circulation filtering operation after the water level in the tub is greater than a preset water level, and a drain operation is performed after the circulation filtering operation is completed.

[0035] The circulation filtering operation and the drain operation are alternately performed until the washing / rinsing process is completed.

[0036] Another object of the present application is to provide a washing machine using the control method of the washing machine.

[0037] Further, the control valve assembly comprises:

[0038] a valve body having a first valve cavity and a second valve cavity in the valve body, the first valve cavity being connected to the water inlet of the circulation pump and the circulation water outlet of the water inlet, and the second valve cavity being connected to the sewage inlet of the drain port and the sewage outlet of the drain pipeline;

[0039] a switching mechanism movably arranged in the valve body, having a first position for opening the circulation water outlet and blocking the sewage inlet, and a second position for blocking the circulation water outlet and opening the sewage inlet;

[0040] Preferably, the washing machine further comprises an external drainage pipeline for draining water to the outside, and the first valve cavity is further provided with a drainage outlet in communication with the external drainage pipeline.

[0041] The switching mechanism blocks the drainage outlet when in the first position and opens the drainage outlet when in the second position.

[0042] Further, the filtering device comprises:

[0043] A filtering cavity, on which a water inlet, a filtered water outlet and a sewage outlet are arranged;

[0044] A filtering mechanism rotatably arranged in the filtering cavity;

[0045] Cleaning particles arranged in the filtering cavity for rubbing and colliding with the inner wall of the filtering cavity and the outer wall of the filtering mechanism along with the water flow.

[0046] After the above technical solution is adopted, the present application has the following beneficial effects compared with the prior art.

[0047] In the present application, the washing machine alternately performs the cyclic filtering operation and the sewage discharge operation during the washing / rinsing process, so that the filtering impurities remaining in the filtering device during the cyclic filtering operation can be discharged in time, avoiding the accumulation of the filtering impurities in the filtering device and affecting the filtering efficiency. Compared with the mode of continuously performing the cyclic filtering operation until the washing / rinsing process is completed, the present application prevents the filtering impurities from being too much and causing the filtering device to be blocked.

[0048] In the present application, the circulating pump is intermittently started during the cyclic filtering operation of the washing machine, and the closing of the circulating pump provides a chance for the filtering impurities attached to the inside of the filtering device to fall off, avoiding the situation that the filtering impurities are too firmly attached to the inside of the filtering device and cannot be fully discharged during the sewage discharge operation. During the closing of the circulating pump, the filtering mechanism is driven to rotate by the driving mechanism, which can agitate the water in the filtering cavity, so that the filtering impurities attached to the outer wall of the filtering mechanism can be stripped under the dual action of the centrifugal force generated by rotation and the agitated water flow, which is beneficial to improve the cleaning efficiency of the filtering impurities.

[0049] In the present application, the control valve assembly is a whole structure, and the opening and closing of multiple independent water paths can be controlled simultaneously by changing the position of the switching mechanism, so as to control the washing machine to perform the cyclic filtering operation, the sewage discharge operation and the drainage operation respectively through the opening and closing of the water paths, which simplifies the control structure and control logic of the water paths in the washing machine and is beneficial to reduce the production cost.

[0050] In this invention, cleaning particles are placed inside the filter chamber. During the filtration process, the cleaning particles continuously rub against the inner wall of the filter chamber and the outer wall of the filter mechanism under the influence of water flow, which can further prevent the deposition of filtered impurities and thus avoid clogging of the filter device, affecting the filtration efficiency. When the filter mechanism is controlled to rotate inside the filter chamber, the movement of the cleaning particles with the water flow helps to further enhance the agitation of the water flow, thereby making it easier for the attached filtered impurities to fall off and improving the self-cleaning efficiency of the filter device.

[0051] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0052] 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:

[0053] Figure 1 This is a schematic diagram of the water circuit connection structure of the control valve assembly when the switching mechanism is in the first position in an embodiment of the present invention;

[0054] Figure 2 This is a schematic diagram of the water circuit connection structure of the control valve assembly when the switching mechanism is in the second position in an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of the control valve assembly in an embodiment of the present invention (the switching mechanism is in the second position);

[0056] Figure 4 This is the present invention. Figure 3 Schematic diagram of section AA;

[0057] Figure 5 This is a schematic diagram of the structure of the washing machine in an embodiment of the present invention;

[0058] Figure 6 This is a flowchart of the control method in Embodiment 1 of the present invention;

[0059] Figure 7 This is the present invention. Figure 5 Enlarged view of point B in the middle;

[0060] Figure 8 This is a schematic diagram of the filtration device in Embodiment 3 of the present invention;

[0061] Figure 9 This is the present invention. Figure 8 A schematic diagram of the CC section.

[0062] In the figure: 10, box; 100, water tank; 110, window pad; 210, drainage pipeline; 220, circulating pipeline; 230, backwater pipeline; 231, backwater control valve; 240, sewage pipeline; 250, external discharge pipeline; 260, water tank drainage pipe; 280, communication pipeline; 300, detergent box; 400, circulating pump; 500, recovery device; 501, filter impurities; 510, shell; 520, filter assembly; 531, first chamber; 532, second chamber;

[0063] 600, filter device; 601, first limit surface; 602, second limit surface; 603, third limit surface; 604, fourth limit surface; 605, fifth limit surface; 606, sixth limit surface; 610, filter cavity; 6101, water inlet; 6102, filtered water outlet; 6103, sewage outlet; 6104, mounting port; 611, sealing support part; 612, sleeve part; 613, reinforcing rib; 620, filter mechanism; 621, water outlet joint; 622, rotating support part; 623, filter screen support part; 624, motor mounting part; 625, filter screen; 631, first bearing; 632, second bearing; 641, first sealing element; 642, second sealing element; 643, third sealing element; 650, filter cavity flange; 651, connecting part; 652, plug-in part; 653, through port; 660, driving mechanism; 680, cleaning particles;

[0064] 700, control valve assembly; 701, water inlet; 702, circulating water outlet; 703, drainage outlet; 704, sewage inlet; 705, sewage outlet; 710, valve body; 711, first valve cavity; 712, second valve cavity; 720, switching mechanism; 732, circulating sealing element; 733, drainage sealing element; 740, flap; 741, first surface; 742, second surface; 750, driving motor.

[0065] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0067] 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.

[0068] 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.

[0069] Example 1

[0070] like Figures 1 to 5 As shown, the washing machine described in this embodiment includes:

[0071] Water container 100;

[0072] The circulating filter pipeline has its inlet and outlet connected to the water tank 100, and a circulating pump 400 is installed on it.

[0073] The filter device 600 is installed on the circulating filter pipeline and has a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103.

[0074] Sewage pipe 240 is used to receive sewage discharged from sewage outlet 6103;

[0075] And, control valve assembly 700.

[0076] Specifically, the control valve assembly 700 includes:

[0077] The valve body 710 has two independent valve chambers: a first valve chamber 711 and a second valve chamber 712. The first valve chamber 711 is provided with an inlet 701 connected to the circulating pump 400 and a circulating water outlet 702 connected to the inlet 6101. The second valve chamber 712 is provided with a sewage inlet 704 connected to the sewage outlet 6103 and a sewage outlet 705 connected to the sewage pipe 240.

[0078] The switching mechanism 720 is movably disposed inside the valve body 710, and has a first position that opens the circulating water outlet 702 and blocks the sewage inlet 704, and a second position that blocks the circulating water outlet 702 and opens the sewage inlet 704.

[0079] In the embodiment, the water inlet 701 of the first valve cavity 711 and the sewage outlet 705 of the second valve cavity 712 are in the open state. When the switching mechanism 720 is in the first position, the water inlet 701 and the circulating water outlet 702 are both in the open state, the circulating pump 400 is connected to the water inlet 6101 of the filter device 600, and meanwhile, the sewage inlet 704 is in the closed state, the sewage outlet 6103 of the filter device 600 is disconnected from the sewage pipeline 240.

[0080] When the switching mechanism 720 is in the second position, the circulating water outlet 702 is in the closed state, the circulating pump 400 is disconnected from the water inlet 6101 of the filter device 600, and meanwhile, the sewage inlet 704 and the sewage outlet 705 are both in the open state, the sewage outlet 6103 of the filter device 600 is connected to the sewage pipeline 240.

[0081] The control valve assembly 700 of the embodiment has two working states, corresponding to different positions of the switching mechanism 720. Specifically, the first working state of the control valve assembly 700 is that the switching mechanism 720 is in the first position, the circulating pump 400 and the water inlet 6101 are connected and the sewage outlet 6103 and the sewage pipeline 240 are disconnected, and the second working state of the control valve assembly 700 is that the switching mechanism 720 is in the second position, the circulating pump 400 and the water inlet 6101 are disconnected and the sewage outlet 6103 and the sewage pipeline 240 are connected.

[0082] In the above scheme, the control valve assembly 700 can simultaneously control the connection and disconnection between the circulating pump 400 and the water inlet 6101 of the filter device 600, and the connection and disconnection between the sewage outlet 6103 of the filter device 600 and the sewage pipeline 240, and by switching the working state of the control valve assembly 700, the switching between the filtering and the sewage processes of the filter device 600 can be realized. The control valve assembly 700 can simultaneously control the connection and disconnection of two relatively independent water paths, which is conducive to simplifying the arrangement of the internal water path structure of the washing machine, and the control logic of the water path connection and disconnection is simpler.

[0083] In the embodiment, the washing machine alternately performs the circulating filtering operation and the sewage operation in the washing / rinsing process.

[0084] The circulating filtering operation includes that the circulating pump 400 is in the open state, the control valve assembly 700 is in the first working state, that is, the control valve assembly 700 connects the circulating pump 400 and the water inlet 6101 and disconnects the sewage outlet 6103 and the sewage pipeline 240, and the water in the tub 100 is subjected to the circulating filtering.

[0085] The blowdown operation includes: the circulating pump 400 is in a closed state, the control valve assembly 700 is in a second working state, that is, the control valve assembly 700 disconnects the circulating pump 400 and the water inlet 6101 and connects the blowdown port 6103 and the blowdown pipeline 240, and the sewage in the filter device 600 is discharged into the blowdown pipeline 240.

[0086] In the above scheme, by alternately performing the circulating filtering operation and the blowdown operation in the washing / rinsing stage of the washing machine, the lint and other filtering impurities remaining in the filter device 600 during the circulating filtering process can be discharged in time, and the accumulation of the filtering impurities in the filter device 600 is avoided, which affects the filtering efficiency. Especially when the content of the lint and other filtering impurities in the water is high, compared with the mode of continuously performing the circulating filtering operation until the washing / rinsing ends, the scheme of the embodiment effectively prevents the situation that the accumulated filtering impurities are too much to cause the filter device 600 to be blocked.

[0087] In a further scheme of the embodiment, the circulating pump 400 is intermittently started during the process that the washing machine performs the circulating filtering operation. By the intermittent starting of the circulating pump 400, during the closing of the circulating pump 400, the water in the tub 100 is temporarily stopped from passing through the filter device 600, and the filtering impurities attached to the inside of the filter device 600 can fall off and dissolve in the water during this period, and then be discharged with the water flow when the blowdown operation is performed. In this way, the situation that the filtering impurities are too firmly attached to the inside of the filter device 600 due to the long duration of the water flow passing through the filter device 600 for filtering is avoided.

[0088] It can be understood that increasing the frequency of the alternating execution of the circulating filtering operation and the blowdown operation can also achieve the purpose of avoiding the filtering impurities from being too firmly attached. However, the alternating execution of the circulating filtering operation and the blowdown operation requires the control valve assembly 700 to switch the working state, and the too frequent switching of the working state of the control valve assembly 700 can shorten the service life.

[0089] In the embodiment, by controlling the circulating pump 400 to be intermittently started during the process of performing the circulating filtering operation, the long-time continuous working of the circulating pump 400 is avoided, which can prolong the service life of the circulating pump 400, and the frequent switching of the working state of the control valve assembly 700 is also avoided, which plays a protective role for the control valve assembly 700.

[0090] In a specific scheme of the embodiment, the circulating filtering operation includes the following steps:

[0091] S1, the control valve assembly 700 connects the circulating pump 400 and the water inlet 6101 and disconnects the blowdown port 6103 and the blowdown pipeline 240;

[0092] S2, the circulating pump 400 is started and lasts for a certain time length;

[0093] S3, turn off the circulating pump 400 and keep for a certain time length;

[0094] S4, if the number of times of executing step S2 in the current cycle filtering operation reaches a preset number, end the cycle filtering operation, otherwise return to step S2.

[0095] Further, in the execution process of a cycle filtering operation, the circulating pump 400 is kept running for a first preset time length T1 after being turned on for the first time, and then is kept running for a second preset time length T2 after being turned on each time. The first preset time length T1 is greater than the second preset time length T2.

[0096] In the above scheme, the filter device 600 is internally provided with a filter screen, and the filtering process is realized through the mesh holes on the filter screen. The specific values of the first preset time length T1 and the second preset time length T2 can be obtained through a large number of experiments in advance and directly written into the control program of the washing machine. The first preset time length T1 is specifically the time length experienced by the mesh holes on the filter screen when most of the mesh holes are covered by filtering impurities during the continuous filtering of the filter device 600.

[0097] In a cycle filtering operation, there is basically no filtering impurities attached to the filter screen when the circulating pump 400 is turned on for the first time, so the value of the first preset time length T1 can be large. During the period when the circulating pump 400 is turned off, it cannot be guaranteed that the filtering impurities attached to the filter screen will completely fall off, that is, when the circulating pump 400 is turned on each time thereafter, there may be some filtering impurities attached to the filter screen, so the value of the second preset time length T2 is less than that of the first preset time length T1, so as to avoid the filter screen being blocked and affecting the filtering process.

[0098] In this embodiment, the filter device 600 comprises:

[0099] a filter cavity 610, on which a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103 are arranged;

[0100] a filter mechanism 620, which is rotatably arranged in the filter cavity 610;

[0101] a driving mechanism 660, configured to drive the filter mechanism 620 to rotate in the filter cavity 610.

[0102] Step S3 further comprises: during the period when the circulating pump 400 is turned off, the driving mechanism 660 is turned on to drive the filter mechanism 620 to rotate in the filter cavity 610.

[0103] Specifically, the filtering mechanism 620 divides the filtering cavity 610 into an outer volume cavity and an inner volume cavity, wherein the water inlet 6101 is in communication with the outer volume cavity, and the filtered water outlet 6102 is in communication with the inner volume cavity. The water in the water tank 100 enters the outer volume cavity through the water inlet 6101 under the action of the circulating pump 400, and then enters the inner volume cavity to be filtered through the filtering mechanism 620. The lint carried in the water adheres to the outer wall of the filtering mechanism 620.

[0104] In the embodiment, the driving mechanism 660 is started during the shutdown of the circulating pump 400, and the filtering mechanism 620 is driven to rotate by the driving mechanism 660. The water flow in the filtering cavity 610 can be agitated, so that the filtering impurities adhered to the outer wall of the filtering mechanism 620 are stripped under the dual actions of centrifugal force and agitated water flow, and are integrated into the water in the filtering cavity 610, which helps the filtering impurities adhered to the outer wall of the filtering mechanism 620 to be fully stripped.

[0105] In the embodiment, the cleaning particles 680 are arranged in the filtering cavity 610, and the cleaning particles 680 are used to clean the inner wall of the filtering cavity 610 and the outer wall of the filtering mechanism 620 by friction and collision with the water flow. During the start of the circulating pump 400, the water flow continuously passes through the filtering device 600, and the cleaning particles 680 continuously rub the inner wall of the filtering cavity 610 and the outer wall of the filtering mechanism 620 under the action of the water flow, so that the deposition speed of the filtering impurities can be slowed down, and thus the continuous start time of the circulating pump 400 can be appropriately prolonged. When the driving mechanism 660 drives the filtering mechanism 620 to rotate, the movement of the cleaning particles 680 with the water flow helps to further agitate the water flow, so that the adhered filtering impurities are more easily stripped.

[0106] Further, in step S3 of the embodiment, the filtering mechanism 620 continuously rotates during the shutdown of the circulating pump 400, and the continuous rotation time of the filtering mechanism 620 is the same each time the driving mechanism 660 is started.

[0107] Preferably, the continuous rotation time of the filtering mechanism 620 in step S3 is a third preset time T3, and the third preset time T3 is less than the second preset time T2.

[0108] The specific value of the third preset time T3 can be obtained through a large number of experiments in advance and directly written into the control program of the washing machine, so as to ensure that the lint and other filtering impurities adhered to the filtering mechanism 620 can be fully stripped.

[0109] In a further scheme of the embodiment, the washing machine further comprises an external drainage pipeline 250 for draining water to the outside, and the control valve assembly 700 is in communication with the drain pipeline 240 and the external drainage pipeline 250 at the same time.

[0110] Specifically, the first valve chamber 711 of the control valve assembly 700 is provided with a drain outlet 703 connected to the external discharge pipe 250. In the first operating state of the control valve assembly 700, that is, when the switching mechanism 720 is in the first position, the switching mechanism 720 blocks the drain outlet 703. In the second operating state of the control valve assembly 700, the switching mechanism 720 is in the second position, opening the drain outlet 703.

[0111] After the washing / rinsing process is completed, the control valve assembly 700 connects the circulation pump 400 and the external drain pipe 250, turns on the circulation pump 400, and the water in the water tank 100 is discharged from the washing machine through the external drain pipe 250.

[0112] Specifically, in this embodiment, the circulating filter pipeline of the washing machine includes:

[0113] The drain pipe 260 of the water tank connects the water tank 100 to the inlet of the circulating pump 400;

[0114] The drain pipe 210 is connected at one end to the outlet of the circulating pump 400 and at the other end to the inlet 701 of the control valve assembly 700.

[0115] The circulation pipeline 220 is connected at one end to the circulation water outlet 702 of the control valve assembly 700 and at the other end to the water inlet 6101 of the filter device 600.

[0116] 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.

[0117] One end of the external drain pipe 250 is connected to the drain outlet 703 of the control valve assembly 700, and the other end leads to the outside of the washing machine.

[0118] 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.

[0119] After washing / rinsing, the control valve assembly 700 switches to a second operating state, simultaneously connecting the water inlet 701 and drain outlet 703 of the first valve chamber 711, and the wastewater inlet 704 and wastewater outlet 705 of the second valve chamber 712. While the water tank 100 drains water to the outside of the washing machine, the drain outlet 6103 of the filter device 600 connects to the drain pipe 240, allowing wastewater to continue to be discharged from the filter device 600 simultaneously, ensuring a high wastewater discharge rate. Furthermore, the simultaneous drainage of the water tank 100 and the wastewater discharge of the filter device 600 improves the washing machine's efficiency and enhances the user experience.

[0120] In this embodiment, the backwater pipeline 230 is specifically connected to the window pad 110 at the cylinder mouth of the water storage cylinder 100.

[0121] The blowdown port 6103 of the filter device 600 is connected to the communication pipeline 280, which is connected to the sewage inlet 704 of the control valve assembly 700. The water inlet end of the blowdown pipeline 240 is connected to the sewage outlet 705 of the control valve assembly 700, forming a discharge channel for the sewage in the filter device 600.

[0122] Preferably, a backwater control valve 231 is arranged on the backwater pipeline 230 for controlling the on-off of the backwater pipeline 230. When the control valve assembly 700 is switched to the second working state, the backwater control valve 231 is closed to cut off the backwater pipeline 230, ensuring that the water in the filter cavity 610 will not flow out from the filtered water outlet 6102, which is conducive to fully discharging the residual filter impurities in the filter device 600 along with the water flow.

[0123] The specific structure of the control valve assembly 700 in this embodiment is shown in Figure 3 and Figure 4 The switching mechanism 720 includes:

[0124] The flap 740 is rotatably installed inside the valve body 710 and has opposite first and second surfaces 741 and 742.

[0125] The drain sealing member 733 is arranged on the first surface 741 of the flap 740 and located inside the first valve cavity 711 for blocking the drain outlet 703.

[0126] The blowdown sealing member is arranged on the first surface 741 of the flap 740 and located inside the second valve cavity 712 for blocking the sewage inlet 704.

[0127] The circulation sealing member 732 is arranged on the second surface 742 of the flap 740 and located inside the first valve cavity 711 for blocking the circulation water outlet 702.

[0128] The drain outlet 703 and the sewage inlet 704 are arranged on the same side surface of the valve body 710. When the switching mechanism 720 is in the first position, the drain sealing member 733 and the blowdown sealing member correspondingly block the drain outlet 703 and the sewage inlet 704, respectively. When the switching mechanism 720 is in the second position, the flap 740 rotates in the direction away from the drain outlet 703 and the sewage inlet 704 relative to the previous state until the circulation sealing member 732 blocks the circulation water outlet 702.

[0129] The flap 740 is connected to a drive motor 750, which drives the flap 740 to rotate within the valve body 710. The drive motor 750 is located outside the valve body 710, avoiding the risk of contact with water and thus enhancing safety. The control valve assembly 700, driven by a single drive motor 750, moves the flap 740 and can simultaneously control the opening / closing states of the circulating water outlet 702, the drainage outlet 703, and the sewage inlet 704, resulting in a simple structure. Compared to existing technologies that require separate control valves for each independent water path, this design effectively saves costs.

[0130] In this embodiment, the first valve chamber 711 and the second valve chamber 712 of the control valve assembly 700 extend horizontally and are arranged parallel to each other. The drain outlet 703 is located on the right end face wall of the first valve chamber 711 along its length extension direction, and the sewage inlet 704 is located on the right end face wall of the second valve chamber 712.

[0131] Preferably, the water inlet 701 is located on the left end face of the first valve chamber 711, parallel to and opposite to the orientation of the drain outlet 703. The sewage outlet 705 is located on the left end face of the second valve chamber 712, parallel to and opposite to the orientation of the sewage inlet 704. When the control valve assembly 700 is in the second working state, the water flows from left to right in the first valve chamber 711 and from right to left in the second valve chamber 712. The water flow experiences less resistance, and the washing machine drains and the filter device 600 discharges wastewater more smoothly.

[0132] The orientation of the circulating water outlet 702 is perpendicular to the orientation of the drain outlet 703. The control valve assembly 700 switches from the first working state to the second working state, and the flap 740 rotates 90° around its axis to move from the first position to the second position.

[0133] Specifically, in this embodiment, using Figure 3 Taking the orientation of the first valve chamber 711 as an example, the first valve chamber 711 is located above the second valve chamber 712, and the circulating water outlet 702 is located on the front side wall of the first valve chamber 711.

[0134] When the switching mechanism 720 is in the first position, the flap 740 is nearly parallel to the right end wall of the first valve chamber 711 and the second valve chamber 712, causing the drain seal 733 to block the drain outlet 703 and the sewage seal to block the sewage inlet 704. When the switching mechanism 720 moves from the first position to the second position, the drive motor 750 drives the flap 740 to rotate forward 90°, causing the circulation seal 732 to block the circulating water outlet 702. At this time, the drain seal 733 separates from the drain outlet 703, and the drain outlet 703 opens; the sewage seal separates from the sewage inlet 704, and the sewage inlet 704 opens.

[0135] In a further aspect of the embodiment, before the washing / rinsing water is fed, the control valve assembly 700 is switched to the first working state, i.e. the circulating pump 400 is turned on and the water inlet 6101 is turned on, and the drain outlet 6103 and the drain pipeline 240 are turned off;

[0136] The water feeding to the tub 100 is started, and after the water level in the tub 100 is greater than the preset water level, the circulating pump 400 is turned on to perform the circulating filtration operation, and after the circulating filtration operation is completed, the drain operation is performed.

[0137] The circulating filtration operation and the drain operation are alternately performed until the washing / rinsing process is completed.

[0138] In the circulating filtration operation of the embodiment, the preset number of times in step S4 is set to three times. That is, in one circulating filtration operation, the circulating pump 400 is turned on three times in succession, and after the circulating pump 400 is turned off for the third time and the driving mechanism 660 is turned on to drive the filtering mechanism 620 to continuously rotate in the filtering cavity 610 for a third preset time T3, the control valve assembly 700 is switched to the second working state to perform the drain operation.

[0139] As shown in FIG. 6, the washing machine of the embodiment includes a control valve assembly 700, a circulating pump 400, a water inlet 6101, a drain outlet 6103, a drain pipeline 240, a driving mechanism 660, a filtering mechanism 620, and a filtering cavity 610. Figure 6 FIG. 7 shows a flowchart of one complete washing program of the washing machine of the embodiment, including the following steps:

[0140] 1) The washing machine is turned on;

[0141] 2) The control valve assembly is switched to the first working state, and the circulating filtration pipeline is turned on;

[0142] 3) The washing water feeding is started;

[0143] 4) The circulating pump is turned on and is kept on for a first preset time T1;

[0144] 5) The circulating pump is turned off, and the driving mechanism is turned on and is kept on for a third preset time T3;

[0145] 6) The driving mechanism is turned off, and the circulating pump is turned on and is kept on for a second preset time T2;

[0146] 7) The circulating pump is turned off, and the driving mechanism is turned on and is kept on for a third preset time T3;

[0147] 8) The driving mechanism is turned off, and the circulating pump is turned on and is kept on for a second preset time T2;

[0148] 9) The circulating pump is turned off, and the driving mechanism is turned on and is kept on for a third preset time T3;

[0149] 10) The driving mechanism is turned off, and the control valve assembly is switched to the second working state, and the filtering device drains the sewage;

[0150] 11) Steps 4) to 10) are repeatedly performed until the washing process is completed;

[0151] 12) The control valve assembly switches to the second working state, the circulation pump is turned on, and the washing machine drains water.

[0152] 13) After drainage is complete, begin rinsing with water.

[0153] 14) Repeat steps 4) to 10) until the rinsing process is complete;

[0154] 15) The control valve assembly switches to the second working state, the circulation pump is turned on, and the washing machine drains water.

[0155] 16) After drainage is complete, proceed with the dehydration process;

[0156] 17) The dehydration process is complete, and the washing program ends.

[0157] 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.

[0158] Through the structural design of the control valve assembly 700, a single drive motor 750 can control the water pumped by the circulation pump 400 to be delivered to the filter device 600 or to the external discharge pipe 250, while simultaneously controlling whether the drain port 6103 of the filter device 600 discharges wastewater. The washing machine's circulation filtration, wastewater discharge, and drainage operations are all controlled by the same control valve assembly 700, simplifying the internal water circuit structure, saving space, and reducing costs.

[0159] Example 2

[0160] like Figure 5 and Figure 7 As shown, this embodiment is a further limitation of the first embodiment above. The washing machine also includes a recycling device 500, which is connected to the outlet end of the drain pipe 240 and is used to collect the sewage discharged by the filter device 600.

[0161] Specifically, the recycling device 500 is used to collect filter impurities 501 such as lint discharged with the wastewater.

[0162] The fine lint in the filtering impurities 501 can enter the ecological cycle and cause harm to the ecological environment and human health if the sewage carrying the filtering impurities 501 is directly discharged into the drain water flow of the washing machine and is drained away with the drain water flow.

[0163] The washing machine of the embodiment is provided with the recycling device 500. The sewage carrying the filtering impurities 501 is discharged from the sewage outlet 6103 and can be collected in the recycling device 500 through the sewage pipeline 240 without entering the drain water flow and being drained away from the washing machine with the drain water flow.

[0164] In a further scheme of the embodiment, the recycling device 500 includes:

[0165] The shell 510 has a recycling chamber inside;

[0166] The filtering assembly 520 is arranged in the recycling chamber and separates the recycling chamber into a first chamber 531 and a second chamber 532.

[0167] The sewage outlet 6103 of the filtering device 600 communicates with the first chamber 531. The sewage carrying the filtering impurities 501 enters the first chamber 531 and is filtered by the filtering assembly 520 to enter the second chamber 532. The filtering impurities 501 are collected in the first chamber 531.

[0168] In the above scheme, the filtering assembly 520 is arranged in the recycling device 500 to filter the sewage discharged by the filtering device 600 and separate the filtering impurities 501 in the sewage from the water. The recycling chamber in the recycling device 500 is separated into the first chamber 531 and the second chamber 532 by the filtering assembly 520. The filtering impurities 501 in the sewage are blocked by the filtering assembly 520, so that the filtering impurities 501 are collected on the upper surface of the filtering assembly 520 in the first chamber 531. The clean water obtained after filtration is collected in the second chamber 532. The user can directly collect and process the separated filtering impurities 501, avoiding the situation that the filtering impurities 501 are mixed in the water and cannot be effectively processed.

[0169] Specifically, the filtering assembly 520 can be a frame arranged horizontally in the recycling chamber at a certain height and a filter screen laid on the frame. After the sewage carrying the filtering impurities 501 enters the first chamber 531, the water can pass through the filtering assembly 520 to enter the second chamber 532, and the filtering impurities 501 are blocked by the filter screen and remain on the upper surface of the filtering assembly 520.

[0170] In the embodiment, the washing machine further includes a cabinet 10. The water tub 100 and the filtering device 600 are arranged in the cabinet 10. The recycling device 500 is arranged on the cabinet 10 and can be inserted / extracted. The user can extract the recycling device 500 from the cabinet 10 for cleaning.

[0171] Specifically, the shell 510 of the recovery device 500 is inserted / extracted on the cabinet 10, and the upper side of the shell 510 has an open mouth. When the user extracts the shell 510 from the cabinet 10, the filtered impurities 501 adhering to the upper surface of the filter assembly 520 can be cleaned through the open mouth on the upper side of the shell 510. The filter assembly 520 is preferably detachably connected with the shell 510, and the user can detach the filter assembly 520 from the inside of the shell 510 and take it out for cleaning, which is more convenient to operate.

[0172] In a preferred scheme of the embodiment, a water outlet is arranged on the second chamber 532 for discharging the filtered clean water. By arranging the water outlet on the second chamber 532, the clean water entering the second chamber 532 can be discharged from the recovery device 500 in time, so as to avoid the overflow of the recovery device 500 when the amount of sewage discharged by the filtering device 600 is large. Otherwise, the capacity of the second chamber 532 needs to be increased, that is, the volume of the recovery device 500 needs to be increased, which leads to a large space occupied by the recovery device 500 in the washing machine, which is not conducive to the miniaturization of the overall volume of the washing machine.

[0173] On the other hand, the water in the second chamber 532 can be automatically discharged through the water outlet, and when the user cleans the recovery device 500, he only needs to clean the filtered impurities 501 on the filter assembly 520, without manually pouring out the clean water in the second chamber 532. When the filter assembly 520 is detachably mounted in the shell 510, the user does not even need to completely take the shell 510 out of the cabinet 10 of the washing machine, but only needs to take out the filter assembly 520 for cleaning, which is more convenient to operate.

[0174] In a preferred scheme of the embodiment, the water outlet of the second chamber 532 communicates with the water tub 100, and the water collected in the second chamber 532 is transported to the water tub 100. For example, the water outlet of the second chamber 532 can communicate with the backwater pipeline 230, or directly communicate with the water tub 100 through a pipeline. Alternatively, the water outlet of the second chamber 532 communicates with the detergent box 300 on each side of the recovery device 500, and since the detergent box 300 communicates with the water tub 100 through a pipeline, the water collected in the second chamber 532 can enter the water tub 100 through the detergent box 300.

[0175] Since the sewage entering the recovery device 500 has been filtered by the filter assembly 520 in the recovery device 500, the filtered impurities 501 have been removed, and the clean water collected in the second chamber 532 does not contain the filtered impurities 501. By transporting it into the water tub 100, the reuse of this part of clean water can be realized, thereby reducing the amount of water required for the continuous operation of the washing machine, and achieving the purpose of saving the water consumption of the washing machine.

[0176] 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.

[0177] Since the water collected in the second chamber 532 is clean water without filtered impurities 501, directly discharging it will not cause the problem of fine lint entering the ecological cycle.

[0178] In this embodiment, a recycling device 500 is installed inside the washing machine. Wastewater containing filtered impurities 501 discharged from the filtration device 600 passes sequentially through the connecting pipe 280, the control valve assembly 700, and the drain pipe 240 before being collected in the recycling device 500, instead of being directly discharged into the washing machine's drain water. This avoids the situation where fine lint from the filtered impurities 501 enters the ecological cycle with the drain water, potentially impacting the ecological environment and human health. The recycling device 500 is equipped with a filter assembly 520 to filter the collected wastewater, thereby separating the filtered impurities 501 from the water, facilitating the cleaning of the filtered impurities 501.

[0179] Example 3

[0180] like Figure 8 and Figure 9 As shown, this embodiment further defines the filter device 600 in Embodiment 1 or 2 above. The filter water outlet 6102 of the filter device 600 extends outward from the filter cavity 610 to form a sealing support portion 611. One end of the filter mechanism 620 has a water outlet connector 621 inserted into the sealing support portion 611, and the water outlet connector 621 is rotatably and sealingly connected to the sealing support portion 611. A first bearing 631 is sleeved on the water outlet connector 621, and a first sealing element 641 is provided on the side of the first bearing 631 facing the inside of the filter cavity 610 to seal the gap between the water outlet connector 621 and the sealing support portion 611.

[0181] Specifically, the filtration mechanism 620 includes a filter screen support and a filter screen 625, wherein the filter screen support includes:

[0182] The filter support 623 is located inside the filter chamber 610, and the filter 625 covers the surface of the filter support 623.

[0183] 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.

[0184] 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.

[0185] In the above scheme, the first bearing 631 is arranged between the water outlet joint 621 and the sealing support part 611, the water outlet joint 621 is supported, the rotation of the water outlet joint 621 in the sealing support part 611 is smoother, the structure is stable, and the stable rotation of the filtering mechanism 620 in the filtering cavity 610 can be ensured. The first sealing element 641 is arranged on the right side of the first bearing 631, the washing water in the filtering cavity 610 cannot enter the gap between the water outlet joint 621 and the sealing support part 611, the first bearing 631 is prevented from contacting water, the failure of the first bearing 631 is avoided, and the effect of the first bearing 631 is ensured. At the same time, the first sealing element 641 also prevents the unfiltered washing water from flowing out from the filtering water outlet 6102 through the sealing support part 611, and affects the cleaning efficiency of the filtering device 600 on the thread scraps.

[0186] In the specific scheme of the embodiment, the first sealing element 641 is sleeved on the water outlet joint 621, the inner wall of the first sealing element 641 is in sealing connection with the outer wall of the water outlet joint 621, and the outer wall of the first sealing element 641 is in rotatable sealing connection with the inner wall of the sealing support part 611.

[0187] In the further scheme of the embodiment, the filtering device 600 further comprises a second sealing element 642, the second sealing element 642 is arranged on the side of the first bearing 631 away from the inside of the filtering cavity 610, and the gap between the water outlet joint 621 and the sealing support part 611 is blocked.

[0188] Specifically, the second sealing element 642 is sleeved on the water outlet joint 621, the inner wall of the second sealing element 642 is in sealing connection with the outer wall of the water outlet joint 621, and the outer wall of the second sealing element 642 is in rotatable sealing connection with the inner wall of the sealing support part 611.

[0189] In the above scheme, the water flowing out through the water outlet joint 621 can be blocked by the second sealing element 642 and cannot contact the first bearing 631. The first bearing 631 is arranged between the first sealing element 641 and the second sealing element 642, so that the installation environment of the first bearing 631 is ensured to be water-free, the first bearing 631 is prevented from rusting due to water, and the smoothness of the rotation of the filtering mechanism 620 is affected.

[0190] In the further scheme of the embodiment, the inner wall of the sealing support part 611 has a stepped structure, and the first limiting surface 601, the second limiting surface 602 and the third limiting surface 603 with annular structures and gradually decreasing inner diameters are sequentially formed from one end of the sealing support part 611 to the outside of the filtering cavity 610.

[0191] The first sealing member 641 abuts against the first limiting surface 601 towards the surface outside the filtering cavity 610, the first bearing 631 abuts against the second limiting surface 602 towards the surface outside the filtering cavity 610, and the second sealing member 642 abuts against the third limiting surface 603 towards the surface outside the filtering cavity 610.

[0192] In the above scheme, the inner wall of the sealing support part 611 with the stepped structure forms multiple vertical annular limiting surfaces, which abut against the left side surfaces of the first sealing member 641, the first bearing 631 and the second sealing member 642 respectively, so as to limit the movement of the above three in the axial direction of the water outlet joint 621, and prevent the cooperation structure between the water outlet joint 621 and the sealing support part 611 from loosening during the rotation of the filtering mechanism 620.

[0193] In the preferred scheme of the present embodiment, the outer diameter of the water outlet joint 621 at the end close to the outside of the filtering cavity 610 is smaller than that at the other end, and an annular fourth limiting surface 604 is formed on the outer wall of the water outlet joint 621 and perpendicular to the axis of the water outlet joint 621. The surface of the first bearing 631 towards the inside of the filtering cavity 610 abuts against the fourth limiting surface 604.

[0194] By setting the outer diameter of the left end of the water outlet joint 621 to be smaller than that of the right end, the fourth limiting surface 604 is formed towards the left side at the position of the sudden change of the outer diameter, and abuts against the right side surface of the first bearing 631. In this way, the first bearing 631 is provided with limiting structures on both sides, and the structure is more stable.

[0195] In the present embodiment, the end of the sealing support part 611 away from the filtering cavity 610, i.e. the left end of the sealing support part 611, is connected to the filtering cavity flange 650, and the middle part of the filtering cavity flange 650 has a through hole 653 communicating with the water outlet joint 621. The outer periphery of the through hole 653 extends away from the sealing support part 611 to form a connecting part 651.

[0196] Preferably, the surface of the filtering cavity flange 650 towards the side of the sealing support part 611 has a protruding plug-in part 652, which is plugged into the opening at the left end of the sealing support part 611.

[0197] In the above scheme, the left end of the sealing support part 611 is connected to the filtering cavity flange 650, and the connecting part 651 is formed on the filtering cavity flange 650. The outer diameter of the connecting part 651 is smaller than that of the sealing support part 611, and the inner diameter of the connecting part 651 is preferably equal to that of the water outlet joint 621. When the filtering device 600 is installed in a washing machine, the connecting part 651 on the filtering cavity flange 650 is connected to the backwater pipeline, and compared with the mode that the backwater pipeline is directly connected to the left end of the sealing support part 611, the installation is easier.

[0198] The right side of the filter cavity flange 650 has an insertion part 652 inserted into the left end opening of the sealing support part 611, facilitating positioning when the filter cavity flange 650 and the sealing support part 611 are assembled. The filter cavity flange 650 and the sealing support part 611 are respectively provided with a plurality of fixing parts on the outer periphery, and the filter cavity flange 650 and the sealing support part 611 are fixed by screws penetrating through the fixing parts.

[0199] In a further aspect of the embodiment, the rotating support part 622 at the right end of the filtering mechanism 620 extends outward along the rotating axis of the rotating support part 622, and the filter cavity 610 is provided with a mounting opening 6104 for the rotating support part 622 to pass through. The rotating support part 622 is rotatably and sealingly connected to the mounting opening 6104.

[0200] In the embodiment, the filtering mechanism 620 is driven to rotate by the driving mechanism. To avoid the driving mechanism being in contact with the washing water, the driving mechanism is arranged outside the filter cavity 610. Therefore, the rotating support part 622 extends from the right end of the filter cavity 610, and a motor mounting part 624 is arranged at the right end of the rotating support part 622, which is used to be connected with the driving mechanism, such as a motor.

[0201] Further, the outer periphery of the mounting opening 6104 extends outward along the axis of the rotating support part 622 to form a sleeve part 612 of the filter cavity 610, and the rotating support part 622 is sleeved with a third sealing member 643. The inner wall of the third sealing member 643 is sealingly connected to the outer wall of the rotating support part 622, and the outer wall of the third sealing member 643 is rotatably and sealingly connected to the inner wall of the sleeve part 612.

[0202] A second bearing 632 is further arranged between the sleeve part 612 and the rotating support part 622, and the second bearing 632 is sleeved on the rotating support part 622 and located on the side of the third sealing member 643 facing the outside of the filter cavity 610.

[0203] In the above aspect, the third sealing member 643 prevents water in the filter cavity 610 from leaking out of the mounting opening 6104, and the second bearing 632 supports the rotating support part 622 to ensure smooth relative rotation between the rotating support part 622 and the sleeve part 612. The second bearing 632 is arranged on the right side of the third sealing member 643 and does not come into contact with the water in the filter cavity 610, thereby avoiding failure.

[0204] In a preferred aspect of the embodiment, the inner diameter of one end of the sleeve part 612 close to the outside of the filter cavity 610 is smaller than the inner diameter of the other end, forming an annular structure on the inner wall of the sleeve part 612 and a fifth limiting surface 605 perpendicular to the axis of the rotating support part 622. The surface of the third sealing member 643 facing the outside of the filter cavity 610 abuts against the fifth limiting surface 605.

[0205] The outer diameter of the rotating support portion 622 near one end of the filter cavity 610 is smaller than the outer diameter of the other end, an annular structure is formed on the outer wall of the rotating support portion 622, and a sixth limiting surface 606 perpendicular to the axis of the rotating support portion 622 is formed. The surface of the second bearing 632 towards the inside of the filter cavity 610 abuts against the sixth limiting surface 606.

[0206] In the above scheme, the inner diameter of the right end of the sleeve portion 612 is smaller than the inner diameter of the left end, and a fifth limiting surface 605 towards the left side is formed at the position where the inner diameter of the sleeve portion 612 changes. The outer diameter of the right end of the rotating support portion 622 is smaller than the outer diameter of the left end, and a sixth limiting surface 606 towards the right side is formed at the position where the outer diameter of the rotating support portion 622 changes. The above structure limits the movement of the third seal 643 and the second bearing 632 in the axial direction of the rotating support portion 622, and the structure is stable.

[0207] In the present 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 provided from the peripheral wall. First, the filter mechanism 620, the first seal 641, the second seal 642 and the first bearing 631 at the left end of the filter mechanism 620 are integrally installed inside the filter cavity 610, and then the third seal 643 and the second bearing 632 are installed at the right end of the filter mechanism 620. Finally, the right wall of the filter cavity 610 is buckled with the peripheral wall.

[0208] In the present embodiment, the cross-sectional area of the middle region of the filter screen support portion 623 is constant, and the left and right ends have a tapered structure, so that part of the surface of the filter screen 625 is inclined, which is beneficial to the shedding of attached wire scraps.

[0209] In the present embodiment, the water inlet 6101 and the sewage outlet 6103 on the filter cavity 610 are perpendicular to the axial direction of the filter mechanism 620.

[0210] Preferably, the filter cavity 610 has a cylindrical structure, the water inlet 6101 is arranged near the right end of the filter cavity 610, the sewage outlet 6103 is arranged near the left end of the filter cavity 610, and the water inlet 6101 and the sewage outlet 6103 are symmetrically arranged in the circumferential direction of the filter cavity 610.

[0211] In the above scheme, the water inlet 6101 is arranged as far away from the water outlet connector 621 as possible, so that the area of the filter screen 625 can be fully utilized. The water inlet 6101 and the sewage outlet 6103 are arranged above and below each other and staggered in the axial direction of the filter cavity 610, which is beneficial to the full discharge of the sewage in the filter cavity 610 after the cleaning of the filter device 600.

[0212] In a further aspect of the embodiment, the outer wall of the sealing support part 611 is provided with a reinforcing rib 613 extending in the radial direction of the sealing support part 611, and the reinforcing rib 613 is connected to the surface of the filter cavity 610 on which the filter water outlet 6102 is located.

[0213] Since the sealing support part 611 extends from the left end surface of the filter cavity 610 by a certain length, the reinforcing rib 613 supports the peripheral wall from the outside, thereby ensuring the strength of the sealing support part 611.

[0214] In the filter device 600 of the embodiment, the filter mechanism 620 is supported at both ends by the first bearing 631 and the second bearing 632, thereby ensuring smooth and stable rotation of the filter mechanism 620 in the filter cavity 610. Meanwhile, the first sealing member 641, the second sealing member 642 and the third sealing member 643 are provided to prevent the first bearing 631 and the second bearing 632 from contacting water, thereby avoiding failure of the bearings.

[0215] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment based on the technical essence of the present application are still within the scope of the present application.

Claims

1. A control method of a washing machine, the washing machine comprising: a tub; a circulation filtering pipeline, having a water inlet end and a water outlet end, and being in communication with the tub, and a circulation pump arranged on the circulation filtering pipeline; a filtering device arranged on the circulation filtering pipeline, and having a water inlet, a filtered water outlet and a sewage outlet; a sewage pipeline for receiving sewage discharged from the sewage outlet; and a control valve assembly; characterized in that the control valve assembly comprises a valve body and a switching mechanism arranged in a valve cavity and switchable to two different positions; the switching mechanism is switched to change the connection and disconnection between the circulation pump and the water inlet and between the sewage outlet and the sewage pipeline; the valve body has a first valve cavity and a second valve cavity which are independent of each other, the first valve cavity is arranged to be in communication with the water inlet of the circulation pump and the filtered water outlet of the water inlet, and the second valve cavity is arranged to be in communication with the sewage inlet of the sewage outlet and the sewage outlet of the sewage pipeline; and the switching mechanism is synchronously moved in the first valve cavity and the second valve cavity; the washing machine alternately performs: a circulation filtering operation in which the circulation pump is in an open state, the switching mechanism is in a first position, the filtered water outlet is closed to disconnect the circulation pump and the water inlet, the water inlet is opened to connect the circulation pump and the water inlet, and the sewage inlet is closed to disconnect the sewage outlet and the sewage pipeline, so that the water in the tub is subjected to the circulation filtering operation; and a sewage discharge operation in which the circulation pump is in a closed state, the switching mechanism is in a second position, the water inlet is closed to disconnect the circulation pump and the water inlet, the filtered water outlet is opened to disconnect the circulation pump and the water inlet, the sewage outlet is opened to connect the sewage outlet and the sewage pipeline, and the sewage in the filtering device is discharged into the sewage pipeline during the washing / rinsing process; the circulation pump is intermittently turned on during the circulation filtering operation; the circulation filtering operation comprises the following steps: S1, the control valve assembly is controlled to connect the circulation pump and the water inlet and disconnect the sewage outlet and the sewage pipeline; S2, the circulation pump is turned on and kept on for a certain time; S3, the circulation pump is turned off and kept off for a certain time; and S4, if the number of times of performing step S2 in the circulation filtering operation reaches a preset number, the circulation filtering operation is ended, otherwise, the step S2 is returned to; the circulation pump is kept on for a first preset time T1 after being turned on for the first time and is kept on for a second preset time T2 after being turned on each time during the execution of the circulation filtering operation; the first preset time T1 is greater than the second preset time T2; the filtering device comprises: a filtering cavity, having the water inlet, the filtered water outlet and the sewage outlet arranged thereon; a filtering mechanism, rotatably arranged in the filtering cavity; and a driving mechanism, used for driving the filtering mechanism to rotate in the filtering cavity; the step S3 further comprises: the driving mechanism is turned on to drive the filtering mechanism to rotate in the filtering cavity during the off period of the circulation pump; the filtering mechanism is continuously rotated during the off period of the circulation pump in the step S3, and the continuous rotation time of the filtering mechanism is the same each time the driving mechanism is turned on; the continuous rotation time of the filtering mechanism in the step S3 is a third preset time T3, and the third preset time T3 is less than the second preset time T2. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The control method of the washing machine according to claim 1, characterized in that, ​ 3. The control method of the washing machine according to claim 2, characterized in that, ​ ​ ​ ​ ​ 4. The control method of a washing machine according to claim 2, characterized in that, ​ 5. The control method of a washing machine according to claim 2, characterized in that, ​ ​ ​ ​ ​ 6. The control method of a washing machine according to claim 5, characterized in that, ​ 7. The control method of the washing machine according to claim 6, characterized in that, ​ 8. The control method of a washing machine according to any one of claims 1 to 7, characterized in that, The washing machine further comprises an external drainage pipeline for draining water to the outside, and the control valve assembly is connected to the external drainage pipeline when the drain opening and the drain pipeline are connected. After the washing / rinsing process is completed, the switching mechanism of the control valve assembly is in the second position, blocking the circulating water outlet and opening the drain outlet and the sewage inlet, so as to connect the circulating pump and the external drainage pipeline, start the circulating pump, and drain the water in the tub through the external drainage pipeline, while the sewage in the filter device is drained.

9. The control method of a washing machine according to any one of claims 1 to 7, characterized in that, Before the washing / rinsing process starts, the control valve assembly is connected to the circulating pump and the water inlet, and disconnected from the drain opening and the drain pipeline. After the water level in the tub is higher than the preset water level, the circulating pump is started to perform the circulating filtration operation, and after the circulating filtration operation is completed, the drain operation is performed. The circulating filtration operation and the drain operation are alternately performed until the washing / rinsing process is completed.

10. A laundry machine characterized by The control method of the washing machine according to any one of claims 1-9; The water outlet end of the drain pipeline is connected to a recovery device, and the filtered impurities drained with the sewage drained from the filter device are collected through the recovery device.

11. A laundry washing machine according to Claim 10, characterized in that The washing machine further comprises an external drainage pipeline for draining water to the outside, and the first valve cavity is further provided with a drain outlet connected to the external drainage pipeline. The switching mechanism comprises a flap rotatably installed in the valve cavity, the flap has a drain seal in the first valve cavity on a first surface, and a drain seal in the second valve cavity on a second surface opposite to the first surface, and a circulating seal in the first valve cavity on a second surface opposite to the first surface; the water inlet and the sewage outlet are in an open state, and the drain outlet and the sewage inlet are provided on the same side surface of the valve body; When the switching mechanism is in the first position, the drain seal blocks the drain outlet, the circulating seal opens the circulating water outlet, and the drain seal blocks the sewage inlet; When the switching mechanism is in the second position, the circulating seal blocks the circulating water outlet, the drain seal opens the drain outlet, and the drain seal opens the sewage inlet.

12. A laundry washing machine according to Claim 10 or 11, characterized in that, The filter device comprises: a filter cavity, on which a water inlet, a filtered water outlet, and a drain opening are provided; a filter mechanism rotatably installed in the filter cavity; cleaning particles provided in the filter cavity for rubbing and colliding with the inner wall of the filter cavity and the outer wall of the filter mechanism; the filtered water outlet extends outward from the filter cavity to form a sealing support part; one end of the filter mechanism has a water outlet connector inserted into the sealing support part, and the water outlet connector is rotatably and sealingly connected to the sealing support part; a first bearing, a first seal, and a second seal are sleeved on the water outlet connector, the first seal is provided on one side of the first bearing facing the inside of the filter cavity, and the second seal is provided on one side of the first bearing facing away from the inside of the filter cavity.

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