A washing machine and control method

Abstract

The present application belongs to the technical field of washing machines, and discloses a washing machine and a control method, the washing machine comprising: a water containing cylinder; an external drainage pipeline for draining water outside the washing machine; a filtering device for receiving water in the water containing cylinder to filter, having a water inlet, a filtered water outlet and a sewage outlet; the filtered water outlet is directly or indirectly communicated with the external drainage pipeline, and the water in the water containing cylinder is drained by the external drainage pipeline after being filtered by the filtering device to remove filtering impurities; the washing machine further comprises a recycling device for collecting sewage carrying filtering impurities drained from the sewage outlet. In the present application, the washing machine drains water after filtering by the filtering device, and the filtering impurities cleaned from the filtering device are drained from the sewage outlet and collected in the recycling device, which maximally ensures that no filtering impurities are directly drained from the washing machine, thereby avoiding the case that microplastics existing in the filtering impurities are drained outside with water flow to enter ecological circulation and finally affect the ecological environment and human health.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing machines, in particular, relates to a washing machine and a control method. 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 the clothes and mix into the washing water. If the lint in the washing water cannot be removed, it will most likely adhere to the surface of the clothes after the washing is completed, affecting the washing effect of the clothes. Therefore, a filter for filtering lint is installed on the existing washing machine, and the washing water is circulated 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 to filter 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 lint and sundries, which will affect the filtering effect of the filter, cause the blockage of the drain valve / drain pump, and easily breed bacteria, so it needs to be cleaned in time, otherwise it will cause the pollution of the washing water and secondary pollution of the clothes, affecting the health of the user. However, most of the washing machines need the user to take down the filter for manual cleaning, which is inconvenient to operate.

[0004] Due to the above problems, a filter capable of self-cleaning is proposed in the prior art. For example, a filter and a washing machine are disclosed in Chinese Patent No. 201310612183.8, which comprises a filter cylinder and a filter screen. The cylinder is provided with a water inlet, a water outlet and a sewage outlet. The filter screen is installed in the cylinder and divides the inner cavity of the filter cylinder into an internal cavity and an external cavity. The upper end of the internal cavity is connected with the water inlet, and the lower end is connected with the sewage outlet. The external cavity is connected with the water outlet. The sewage flows into the internal cavity from the water inlet, is filtered by the filter screen, enters the external cavity and flows out from the water outlet, and the filtered sundries are discharged from the sewage outlet.

[0005] However, in the above-mentioned scheme, the sewage outlet is directly connected with the sewage discharge pipeline leading to the outside of the washing machine, and the filtered sundries are discharged from the washing machine together with the washing water, which will cause the following problems.

[0006] In one aspect, in recent years, the concept of microplastics has been proposed and gradually received increasing attention in the field of environmental protection. Microplastics generally refer to plastic fragments and particles with a diameter of less than 5 mm. When mixed into the water environment of nature, microplastics can easily adsorb organic pollutants in water to form organic pollution spheres due to their high specific surface area. Microplastics in water can be easily eaten by low-end food chain organisms such as mussels and plankton, and since microplastics cannot be digested, when these low-end food chain organisms are preyed upon by upper-level organisms, microplastics will continue to accumulate in the upper-level organisms. As the top organisms in the food chain, the food sources of humans include the above-mentioned organisms with in-vivo accumulated microplastics, thereby causing the accumulation of microplastics in the human body and possibly affecting human health.

[0007] Research has found that an important source of microplastics is wastewater discharged by household washing machines. This is because washing machines wash clothes and wash off the fibers of the clothes. With the popularity of chemical fiber fabrics, these shed fibers are discharged with the washing machine drainage flow and become microplastics mixed into the natural water environment. Meanwhile, microplastics can also come from industrial products made of plastic materials, and the outer drum, drain pipe and other structures in the washing machine are generally made of plastic and will inevitably produce shed plastic fragments due to aging and other reasons after long-term use. Therefore, how to reduce the content of microplastics in the washing machine drainage has become a problem to be solved in the field of environmental protection. In the above-mentioned Chinese patent solution, the filter impurities that can contain microplastics are discharged from the washing machine together with the washing machine drainage, and there is a problem of high content of microplastics in the washing machine drainage.

[0008] On the other hand, the washing machine can only circulate and filter the washing / rinsing water during the washing / rinsing process, but the washing machine drainage is not filtered by the filtering device and is directly discharged from the drain port of the filtering device. The washing drum itself can also have filter impurities that have not been completely removed, and direct discharge from the washing machine can also cause microplastics in the washing machine to enter the ecological cycle.

[0009] Therefore, the present application is proposed. SUMMARY

[0010] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a washing machine with a filtering device and a control method. The filtering device filters the drainage flow of the washing machine before discharging it, thereby avoiding the problem of microplastics in the drainage flow. At the same time, the filtering device also has a self-cleaning function, and the filter impurities cleaned out can be discharged into the recycling device for collection, thereby avoiding the problem of microplastics in the filter impurities entering the ecological cycle.

[0011] To solve the above technical problems, the basic idea of the technical solution of the present application is:

[0012] A washing machine comprises:

[0013] water tub;

[0014] an external drainage pipeline for draining water outside the washing machine;

[0015] a filtering device for receiving water in the water tub to filter, having a water inlet, a filtered water outlet and a sewage outlet;

[0016] the filtered water outlet is in communication with the external drainage pipeline, and water in the water tub is drained by the external drainage pipeline after being filtered by the filtering device to remove filtering impurities;

[0017] the washing machine further comprises a recovery device for collecting sewage carrying filtering impurities discharged from the sewage outlet.

[0018] Further, a first switching device is further provided between the filtered water outlet and the external drainage pipeline, for controlling the water tub and the external drainage pipeline to be selectively in communication with the filtered water outlet of the filtering device.

[0019] Preferably, a delivery pump is provided between the water tub and the water inlet of the filtering device, for delivering water in the water tub to the filtering device.

[0020] Further, the first switching device comprises a first valve body having a first valve cavity; the first valve body is provided with a water inlet in communication with the filtered water outlet, a circulating water outlet in communication with the water tub, and a drainage outlet in communication with the external drainage pipeline.

[0021] a switching mechanism is provided in the first valve cavity, for selectively opening the circulating water outlet and the drainage outlet.

[0022] Preferably, the switching mechanism comprises:

[0023] a flap rotatably installed in the first valve cavity, having a first surface and a second surface opposite to each other;

[0024] a drainage sealing member provided on the first surface of the flap, for blocking the drainage outlet;

[0025] a circulating sealing member provided on the second surface of the flap, for blocking the circulating water outlet;

[0026] More preferably, the first switching device further comprises a first driving element for driving the flap to rotate in the first valve cavity.

[0027] Further, a sewage control device is provided between the sewage outlet of the filtering device and the recovery device, for controlling the sewage outlet and the recovery device to be in communication / disconnection.

[0028] Further, the sewage control device comprises a second valve body with a second valve cavity, a sewage inlet and a sewage outlet are arranged on the second valve body, the sewage inlet is communicated with the sewage outlet; a blocking mechanism is arranged in the second valve cavity, for blocking the sewage inlet or the sewage outlet;

[0029] Preferably, the sewage control device further comprises a second driving element, for driving the blocking mechanism to move in the second valve cavity, to open / close the sewage inlet or the sewage outlet.

[0030] Preferably, the washing machine further comprises a first switching device, for controlling the water tank and the external discharge pipeline to be selectively communicated with the filtered water outlet of the filter device; the first switching device comprises a first valve body with a first valve cavity.

[0031] The second valve body is connected with the first valve body as a whole, and the first valve cavity and the second valve cavity are independent of each other.

[0032] Further, the recovery device comprises:

[0033] A shell with a recovery cavity inside;

[0034] A filter assembly arranged in the recovery cavity, for separating the recovery cavity into a first cavity and a second cavity;

[0035] The sewage carrying the filtered impurities enters the first cavity, and enters the second cavity after being filtered by the filter assembly, and the filtered impurities are collected in the first cavity.

[0036] Further, a water outlet communicated with the second cavity is arranged on the recovery device, for discharging the water filtered by the filter assembly;

[0037] Preferably, the water outlet is communicated with the water tank, and the filtered water is introduced into the water tank; and / or, the water outlet is communicated with the external discharge pipeline, and the filtered water is discharged through the external discharge pipeline.

[0038] More preferably, the water outlet is connected with a second switching device, and the second switching device controls the water tank and the external discharge pipeline to be selectively communicated with the water outlet.

[0039] Further, a tee structure is arranged between the water tank and the water inlet of the filter device, the tee structure is communicated with the external discharge pipeline, and an openable / closable control valve is arranged between the tee structure and the external discharge pipeline.

[0040] Another object of the present application is to provide a control method of the washing machine, wherein a delivery pump is arranged between the water tank and the water inlet of the filter device; in the draining stage of the washing machine, the delivery pump is opened, the water in the water tank is introduced into the filter device, and the filtered water is discharged through the external discharge pipeline after the filtered impurities are filtered out.

[0041] Further, the washing machine further comprises a pollution control device, which controls the on / off between the recycling device and the pollution outlet of the filtering device;

[0042] During the pollution process of the filtering device, the pollution control device connects the recycling device and the pollution outlet of the filtering device, and the sewage carrying the filtering impurities is discharged through the pollution outlet and collected in the recycling device;

[0043] Preferably, the washing machine further comprises a first switching device, which controls the on / off between the water tank and the external discharge pipeline and the filtered water outlet of the filtering device;

[0044] During the washing / rinsing process, the first switching device connects the water tank and the filtered water outlet of the filtering device, and the circulating pump is started, so that the water in the water tank is circulated through the filtering device to filter out the filtering impurities in the water;

[0045] During the drainage stage of the washing machine, the first switching device connects the external discharge pipeline and the filtered water outlet of the filtering device, and the circulating pump is started, so that the water in the water tank is filtered through the filtering device and then discharged through the external discharge pipeline.

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

[0047] In the present application, the water in the water tank is first drained through the filtering device, and the filtering impurities in the water are filtered out before being discharged from the washing machine, thereby avoiding the presence of filtering impurities in the drainage water flow. At the same time, the recycling device is also provided in the washing machine, and the filtering impurities discharged from the filtering device after self-cleaning are collected in the recycling device, and will not flow into the drainage water flow. Through the above-mentioned manner, the filtering impurities are directly discharged from the washing machine to the greatest extent, thereby avoiding the micro-plastics in the filtering impurities from entering the ecological cycle with the water flow, and ultimately affecting the ecological environment and human health.

[0048] In the present application, by providing the first switching device downstream of the filtered water outlet, the flow direction of the filtered water discharged from the filtering device can be controlled, and the filtering device can be controlled to be used for the circulation filtering of the washing / rinsing water during the washing / rinsing stage, and to be used for the filtering of the drainage water flow during the drainage stage, without the need to provide multiple filtering devices, thereby simplifying the internal structure of the washing machine.

[0049] In the present application, the filtering assembly is provided in the recycling device to filter the sewage discharged from the filtering device, so as to separate the filtering impurities from the water, thereby facilitating the user to handle the filtering impurities. The water outlet is provided on the recycling device to discharge the filtered water, thereby avoiding the overflow of the recycling device. At the same time, the filtered water can be introduced into the water tank for reuse, or directly discharged through the external discharge pipeline, thereby avoiding the problem that the micro-plastics contained in the filtering impurities enter the drainage water flow.

[0050] The three-way structure is arranged between the water tank and the water inlet of the filter device and is communicated with the external discharge pipeline, and the control valve is arranged to control the water path on-off, so that once the filter device is blocked during the water discharge process, the water in the water tank can be directly discharged through the external discharge pipeline by opening the control valve, and the normal operation of the washing machine is ensured.

[0051] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0052] The accompanying drawings, which are part of the present application, serve to further understand the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. In the drawings:

[0053] Figure 1 is a structural schematic diagram of a washing machine in the first embodiment of the present application;

[0054] Figure 2 is a structural schematic diagram of a washing machine in the second embodiment of the present application;

[0055] Figure 3 is a water path communication schematic diagram in the washing / rinsing process in the second embodiment of the present application;

[0056] Figure 4 is a water path communication schematic diagram in the water discharge stage in the second embodiment of the present application;

[0057] Figure 5 is a water path communication schematic diagram in the filter device sewage discharge process in the second embodiment of the present application;

[0058] Figure 6 is a communication structure schematic diagram between the filter device and the recovery device in the second embodiment of the present application;

[0059] Figure 7 is a control flow chart of the washing machine in the water discharge stage in the sixth embodiment of the present application;

[0060] Figure 8 is a control flow chart of the washing machine in the washing / rinsing process in the sixth embodiment of the present application;

[0061] Figure 9 is a partial enlarged view of the sewage inlet of the recovery device in the seventh embodiment of the present application (normal state);

[0062] Figure 10 is a partial enlarged view of the sewage inlet of the recovery device in the seventh embodiment of the present application (occlusion state when the air pump is opened);

[0063] Figure 11 is a partial enlarged view of the sewage inlet of the recovery device in embodiment seven of the present application (open state after the air pump is closed);

[0064] Figure 12 is a structural schematic view of the blocking member in embodiment seven of the present application;

[0065] Figure 13 is a schematic view of the communication structure between the filtering device and the recovery device in the first implementation of embodiment eight of the present application (no water in the sewage temporary storage device);

[0066] Figure 14 is an enlarged schematic view of A in the present application; Figure 13

[0067] Figure 15 is a schematic view of the communication structure between the filtering device and the recovery device in the first implementation of embodiment eight of the present application (full water in the sewage temporary storage device);

[0068] Figure 16 is an enlarged schematic view of B in the present application; Figure 15

[0069] is a schematic view of the communication structure between the filtering device and the recovery device in the third implementation of embodiment eight of the present application. Figure 17 In the figure: 10, box; 100, water containing cylinder; 110, window pad; 210, drainage pipeline; 230, backwater pipeline; 240, sewage discharge pipeline; 241, sewage discharge valve; 250, external discharge pipeline; 251, control valve; 260, water containing cylinder drainage pipe; 300, water inlet box; 400, conveying pump; 500, recovery device; 510, shell; 520, filtering assembly; 531, first chamber; 532, second chamber; 540, blocking member; 541, base body; 542, opening part; 550, sewage inlet; 551, tubular part; 552, connecting part; 600, filtering device; 610, filtering cavity; 6101, water inlet; 6102, filtered water outlet; 6103, sewage discharge port; 620, filtering mechanism; 660, driving mechanism;

[0070] 701, water inlet; 702, circulating water outlet; 703, drainage outlet; 704, sewage inlet; 705, sewage outlet; 711, first valve body; 712, switching mechanism; 713, first motor; 721, second valve body; 722, blocking mechanism; 723, second motor; 810, air pump; 811, suction pipeline; 820, sewage temporary storage device; 821, air permeable hole; 822, floating ball; 823, guide part; 830, buffer part; 831, air passage pipeline; 832, air passage hole.

[0071] ​​

[0072] 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

[0073] 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.

[0074] 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.

[0075] 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.

[0076] Example 1

[0077] like Figure 1 As shown, the washing machine described in this embodiment includes:

[0078] Water container 100;

[0079] The external drain pipe 250 is used to drain water to the outside of the washing machine.

[0080] The filter device 600 receives water from the water container 100 for filtration and has an inlet 6101 and a filtered water outlet 6102.

[0081] The filter device 600 has a filtered water outlet 6102 connected to the external discharge pipe 250. When the washing machine drains water, the water in the water tank 100 is filtered by the filter device 600 to remove impurities and then discharged through the external discharge pipe 250.

[0082] Specifically, in this embodiment, the filtered water outlet 6102 of the filter device 600 is directly connected to the external discharge pipe 250, that is, the water inlet of the external discharge pipe 250 is connected to the filtered water outlet 6102.

[0083] In the above scheme, the washing machine drainage flow first passes through the filter device 600 for filtering, and then is discharged by the external drainage pipeline 250, which can ensure that the washing machine drainage does not contain filtering impurities, thereby avoiding the problem that microplastics contained in the filtering impurities are discharged with the water flow and enter the ecological cycle, thereby causing harm to the ecological environment and human health.

[0084] Further, the filter device 600 of the embodiment is provided with a pollution discharge port 6103, and the filtering impurities remaining in the filter device 600 during the filtering process can be discharged with the water flow through the pollution discharge port 6103, without the need for the user to take out the filter device 600 for manual cleaning, and the use is more convenient. The washing machine is internally provided with a recycling device 500, and the sewage discharged from the pollution discharge port 6103 is finally introduced into the recycling device 500 for collection, and the filtering impurities therein will not flow into the drainage flow and be directly discharged from the washing machine. The recycling device 500 can process the received sewage, thereby collecting the filtering impurities in the sewage and preventing the filtering impurities from entering the water cycle in nature.

[0085] In the above manner, the filtering impurities are maximally ensured not to be discharged with the washing machine drainage flow, thereby avoiding the problem that microplastics contained in the filtering impurities enter the ecological cycle.

[0086] In the embodiment, a delivery pump 400 is arranged between the water tank 100 and the water inlet 6101 of the filter device 600. Specifically, the water tank 100 is connected to a water tank drainage pipe 260, the water tank drainage pipe 260 is connected to a water inlet end of the delivery pump 400, a water outlet end of the delivery pump 400 is connected to the drainage pipeline 210, and the drainage pipeline 210 is connected to the water inlet 6101 of the filter device 600. The pollution discharge port 6103 of the filter device 600 is connected to a pollution discharge pipeline 240 for conveying the discharged sewage, and a pollution discharge valve 241 is arranged on the pollution discharge pipeline 240, so as to control the on-off of the pollution discharge pipeline 240.

[0087] During the drainage stage of the washing machine, the pollution discharge valve 241 is closed, and the delivery pump 400 is started, so that the water in the water tank 100 is introduced into the filter device 600 under the action of the delivery pump 400, and after the filtering impurities are filtered out by the filter device 600, the water is discharged from the washing machine by the external drainage pipeline 250. After the drainage is completed, the pollution discharge valve 241 is opened, the pollution discharge pipeline 240 is connected, and the sewage remaining in the filter device 600 can be discharged from the pollution discharge port 6103 and finally introduced into the recycling device 500 through the pollution discharge pipeline 240.

[0088] The washing machine of the embodiment can filter the drainage flow by the filter device 600, remove the filtering impurities existing in the drainage flow, and avoid the filtering impurities containing microplastics from being directly discharged from the washing machine with the drainage flow, thereby avoiding the problem that the content of microplastics in the washing machine drainage is too high, which causes harm to the ecological environment.

[0089] Example 2

[0090] like Figures 2 to 5 As shown, the difference between this embodiment and the first embodiment described above is that the filtered water outlet 6102 of the filtration device 600 is indirectly connected to the external discharge pipe 250. For example, the filtered water outlet 6102 is connected to a transfer device, such as a water storage tank or a water valve, and the inlet end of the external discharge pipe 250 is connected to this transfer device, thereby achieving indirect connection between the filtered water outlet 6102 and the external discharge pipe 250.

[0091] In this embodiment, a first switching device is provided between the filtered water outlet 6102 of the filter device 600 and the external discharge pipe 250, thereby achieving indirect connection between the filtered water outlet 6102 and the external discharge pipe 250. The first switching device is also connected to the water tank 100 and can be used to control the selective connection between the water tank 100 and the external discharge pipe 250 and the filtered water outlet 6102 of the filter device 600.

[0092] Specifically, the first switching device includes a first valve body 711 having a first valve chamber. The first valve body 711 is provided with an inlet 701 communicating with the filtered water outlet 6102, a circulating water outlet 702 communicating with the water container 100 via a return water pipe 230, and a drain outlet 703 communicating with an external discharge pipe 250. A switching mechanism 712 is provided within the first valve chamber. The switching mechanism 712 is movably installed within the first valve chamber and can selectively open either the circulating water outlet 702 or the drain outlet 703.

[0093] During the washing / rinsing process of the washing machine, the first switching device connects the water tank 100 and the filtered water outlet 6102 of the filter device 600, that is, the switching mechanism 712 opens the circulating water outlet 702. After the delivery pump 400 is turned on, the water in the water tank 100 is pumped to the filter device 600, filtered, enters the first valve chamber, and then flows out from the circulating water outlet 702 into the return water pipe 230. The return water pipe 230 is specifically connected to the window gasket 110 at the opening of the water tank 100. Water filtered by the filter device 600 to remove impurities returns to the water tank 100 from the window gasket 110. Under the action of the delivery pump 400, the water in the water tank 100 can continuously circulate through the filter device 600, thereby removing impurities from the water. The reduced content of impurities in the washing / rinsing water can improve the washing effect of the washing machine.

[0094] In the draining stage of the washing machine, the first switching device is controlled to open the filter water outlet 6102 of the filter device 600 and the external draining pipeline 250, i.e. the switching mechanism 712 is controlled to open the draining outlet 703. After the delivery pump 400 is opened, the water in the tub 100 is pumped to the filter device 600, filtered, and then enters the first valve cavity and flows out of the draining outlet 703 into the external draining pipeline 250. The water in the tub 100 is filtered by the filter device 600 to remove impurities, and then drained through the external draining pipeline 250, so that the content of impurities in the water drained by the washing machine is significantly reduced.

[0095] In the above scheme, the first switching device is arranged downstream of the filter water outlet 6102 of the filter device 600, so that the flow direction of the filtered water discharged by the filter device 600 can be controlled. Thus, the washing machine can use the same filter device 600 to perform cycle filtration on the washing / rinsing water in the washing / rinsing stage and to filter the water flow in the draining stage. The washing machine does not need to arrange filter structures at different positions of the waterway structure, so that the internal structure of the washing machine is simplified.

[0096] In this embodiment, the switching mechanism 712 in the first valve cavity specifically includes:

[0097] a flap rotatably arranged in the first valve cavity and having a first surface and a second surface opposite to each other;

[0098] a draining seal arranged on the first surface of the flap and used for blocking the draining outlet 703;

[0099] a cycle seal arranged on the second surface of the flap and used for blocking the cycle water outlet 702.

[0100] In detail, the water inlet 701 of the first valve body 711 is arranged on the left side cavity wall thereof, the cycle water outlet 702 is arranged on the front side cavity wall, and the draining outlet 703 is arranged on the right side cavity wall. The flap of the switching mechanism 712 is rotated by 90° around the rotation shaft thereof, so that the state of the draining seal blocking the draining outlet 703 is switched to the state of the cycle seal blocking the cycle water outlet 702.

[0101] Further, the first switching device further includes a first driving element for driving the flap to rotate in the first valve cavity. In this embodiment, the first driving element is a first motor 713 arranged outside the first valve body 711, and the driving end of the first motor 713 is connected with the flap. In the washing / rinsing process of the washing machine, the first motor 713 drives the flap to rotate to the position where the draining seal blocks the draining outlet 703, and in the draining stage of the washing machine, the first motor 713 drives the flap to rotate to the position where the cycle seal blocks the cycle water outlet 702.

[0102] In the specific scheme of this embodiment, the filter device 600 includes:

[0103] The filter cavity 610 has a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103;

[0104] The filter mechanism 620 is rotatably arranged in the filter cavity 610.

[0105] The driving mechanism 660 is connected with the filter mechanism 620 and is used to drive the filter mechanism 620 to rotate in the filter cavity 610.

[0106] The filter mechanism 620 includes a filter screen support and a filter screen covering the surface of the filter screen support, which divides the filter cavity 610 into an outer cavity and an inner cavity. The water in the water tank 100 enters the outer cavity of the filter cavity 610 through the water inlet 6101, and the filtered impurities in the water are blocked by the filter screen and adhere to the outer surface of the filter mechanism 620. The clean water without filtered impurities enters the inner cavity and finally flows out of the filter cavity 610 from the filtered water outlet 6102. Through the aperture design of the filter screen, the filter mechanism 620 can not only filter large-size wire scraps in the water, but also filter micro-plastics in the water, thereby significantly reducing the content of micro-plastics in the washing machine drainage.

[0107] When it is necessary to clean the filter device 600, the filter mechanism 620 is driven to rotate in the filter cavity 610 by the driving mechanism 660 such as a motor, the residual water in the filter cavity 610 is agitated, the filtered impurities adhering to the surface of the filter mechanism 620 are stripped from the filter mechanism 620 under the action of centrifugal force and turbulent water flow, and then are mixed into the water in the filter cavity 610 and are discharged with the water flow through the sewage outlet 6103 and finally can be collected in the recycling device 500.

[0108] The washing machine described in the embodiment further includes a sewage control device arranged between the sewage outlet 6103 of the filter device 600 and the recycling device 500 and used to control the on / off between the sewage outlet 6103 and the recycling device 500. When the filter device 600 filters the water flowing in, the sewage control device disconnects the communication between the sewage outlet 6103 and the recycling device 500, so that the water flowing into the filter device 600 cannot flow out of the sewage outlet 6103, and it is ensured that the water received by the filter device 600 can be discharged from the filtered water outlet 6102 after being filtered.

[0109] During the sewage discharge process in which the filter device 600 discharges sewage to the outside, the sewage control device connects the recycling device 500 and the sewage outlet 6103 of the filter device 600, the sewage carrying the filtered impurities is discharged through the sewage outlet 6103 and enters the recycling device 500 to be collected.

[0110] In the embodiment, the pollution control device comprises a second valve body 721 having a second valve cavity, and a sewage inlet 704 and a sewage outlet 705 are arranged on the second valve body 721, and the sewage inlet 704 is communicated with the pollution outlet 6103. A blocking mechanism 722 is arranged in the second valve cavity for blocking the sewage outlet 705. The sewage outlet 705 is connected with the pollution pipeline 240, and the sewage carrying the filtered impurities flows out from the sewage outlet 705 and finally enters the recovery device 500 along the pollution pipeline 240.

[0111] The pollution control device further comprises a second driving element for driving the blocking mechanism 722 to move in the second valve cavity to open / close the sewage outlet 705.

[0112] The specific structure of the blocking mechanism 722 is similar to the switching mechanism 712 in the first valve cavity, and the blocking mechanism 722 also comprises a rotatable flap and a sealing element arranged on the flap. The sewage outlet 705 is arranged on the right cavity wall of the second valve body 721, and the flap can be controlled to rotate to make the sealing element block the sewage outlet 705, or the flap can be controlled to reversely rotate to make the sealing element separate from the sewage outlet 705, thereby realizing the opening of the sewage outlet 705.

[0113] The second driving element is a second motor 723 arranged outside the second valve body 721, and the driving end of the second motor 723 is connected with the flap in the second valve cavity, thereby driving the flap to rotate in the second valve cavity and realizing the opening or blocking of the sewage outlet 705.

[0114] It can be understood that the positions of the sewage inlet and the sewage outlet on the second valve body can be transposed, so that the movement of the blocking mechanism in the second valve cavity can open / close the sewage inlet, and the control of the sewage discharge in the filtering device can also be realized.

[0115] In the preferred scheme of the embodiment, the first valve body 711 and the second valve body 721 are connected as a whole, but the first valve cavity and the second valve cavity remain independent from each other and are controlled by the first motor 713 and the second motor 723 respectively to independently control the actions of the switching mechanism 712 and the blocking mechanism 722.

[0116] In the above scheme, the first valve body 711 of the first switching device and the second valve body 721 of the pollution control device are connected as a whole, so that the two are integrally arranged in the same space in the washing machine, and the structure is more compact, which is beneficial to saving the installation space.

[0117] In the embodiment, the drainage of the washing machine passes through the filtering device 600 and the first valve body 711 in sequence and then enters the external drainage pipeline 250 for discharge. During the drainage stage of the washing machine, if the drainage filtering circuit (from the water inlet 6101 of the filtering device 600 to the drainage outlet 703 of the first valve body 711) is blocked, the washing machine cannot complete the drainage, and the washing program will be interrupted due to the drainage failure.

[0118] To solve this problem, the embodiment is provided with a tee structure between the water tank 100 and the water inlet 6101 of the filter device 600, the tee structure is communicated with the external discharge pipeline 250, and an openable / closable control valve 251 is arranged between the tee structure and the external discharge pipeline 250.

[0119] In the drainage stage of the washing machine, normally, the control valve 251 is in a closed state, the tee structure is not communicated with the external discharge pipeline 250, the water in the water tank 100 is filtered in the filter device 600, and then enters the external discharge pipeline 250 through the drainage outlet 703 of the first valve body 711 to be discharged from the washing machine. When the drainage filter circuit is blocked, the control valve 251 is opened, the tee structure is communicated with the external discharge pipeline 250, and then the water in the water tank 100 can be directly discharged into the external discharge pipeline 250 to be discharged from the washing machine. At this time, the drainage of the washing machine is no longer filtered, but the normal operation of the washing program is preferentially ensured.

[0120] In the embodiment, when the washing machine is drained, the water in the water tank 100 is filtered to remove filter impurities before being discharged from the washing machine, which avoids the case that the microplastics possibly existing in the drainage of the washing machine are directly discharged together with the drainage water flow to enter the ecological cycle. Meanwhile, the recycling device 500 is arranged in the washing machine to collect the sewage carrying filter impurities discharged from the filter device 600, which avoids the filter impurities cleaned from the filter device 600 being directly discharged from the washing machine, and then causes the content of microplastics in the drainage of the washing machine to be too high.

[0121] The first switching device is connected at the filtered water outlet 6102 of the filter device 600, which is used to control the filtered water discharged from the filter device 600 to be re-input into the water tank 100 or the external discharge pipeline 250, so that the filter device 600 can be used for the circulation filtration of the washing / rinsing water in the washing / rinsing stage, and can also be used for the filtration of the drainage water flow in the drainage stage, which simplifies the internal structure of the washing machine.

[0122] Embodiment three

[0123] As shown in Figure 2 and Figure 6 , the embodiment is a further limitation of the above-mentioned embodiment two, and the recycling device 500 comprises:

[0124] a shell 510, which has a recycling chamber inside;

[0125] a filter assembly 520, which is arranged in the recycling chamber and separates the recycling chamber into a first chamber 531 and a second chamber 532.

[0126] The sewage carrying the impurities is introduced into the first chamber 531, filtered by the filtering assembly 520, and then introduced into the second chamber 532, and the filtering impurities are collected in the first chamber 531.

[0127] In the above scheme, the recovery device 500 collects the sewage discharged by the filtering device 600, and further filters the sewage by the internal filtering assembly 520 to separate the filtering impurities in the sewage. In this way, the user can directly collect and process the separated filtering impurities, avoiding the situation that the filtering impurities are mixed in the sewage and cannot be effectively processed.

[0128] Specifically, the filtering assembly 520 can be a frame horizontally arranged at a certain height in the recovery chamber and a filter screen laid on the frame, and the upper side of the filtering assembly 520 forms the first chamber 531 and the lower side forms the second chamber 532. After the sewage carrying the filtering impurities is introduced into the first chamber 531, the water can pass through the filtering assembly 520 into the second chamber 532, and the filtering impurities are blocked by the filter screen and remain on the upper surface of the filtering assembly 520.

[0129] The filter screen of the filtering assembly 520 can filter the microplastics in the sewage to prevent the microplastics from mixing into the water body.

[0130] In this embodiment, the recovery device 500 is inserted / extracted on the cabinet 10 of the washing machine, and the user can extract the recovery device 500 from the cabinet 10 for cleaning.

[0131] Specifically, the housing 510 of the recovery device 500 is inserted / extracted on the cabinet 10, and the upper side of the housing 510 has an opening. When the user extracts the housing 510 from the cabinet 10, the filtering impurities attached to the upper surface of the filtering assembly 520 can be cleaned through the opening on the upper side of the housing 510. The filtering assembly 520 is preferably detachably connected to the housing 510, and the user can detach the filtering assembly 520 from the inside of the housing 510 and take it out for cleaning, which is more convenient to operate.

[0132] In a further scheme of this embodiment, a water outlet is arranged on the recovery device 500 and communicates with the second chamber 532, for discharging the water filtered by the filtering assembly 520. The arrangement of the water outlet can discharge the clean water in the second chamber 532 from the recovery device 500 in time, avoiding 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.

[0133] 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 recycling device 500, only the filtered impurities on the filter assembly 520 need to be cleaned, without the need to manually pour out the water in the second chamber 532. When the filter assembly 520 is detachably installed in the shell 510, the user does not even need to completely remove the shell 510 from the cabinet 10 of the washing machine, but only needs to remove the filter assembly 520 for cleaning, which is more convenient to operate.

[0134] In a preferred form of the embodiment, the water outlet of the recycling device 500 is in communication with the water tub 100, and the water filtered by the filter assembly 520 is introduced into the water tub 100 for reuse in the subsequent operation of the washing machine, which can save the water consumption of the washing machine.

[0135] Further preferably, the washing machine further comprises a detergent feeding device having a water inlet box 300 in communication with the water tub 100. The recycling device 500 is arranged inside the water inlet box 300, and after the filtered device 600 discharges the sewage, the clean water flows out of the water outlet on the second chamber 532 and directly enters the water inlet box 300, and then enters the water tub 100 along the pipeline connecting the water inlet box 300 and the water tub 100.

[0136] Through the above structure, the space inside the water inlet box 300 can be fully utilized, and at the same time, a separate pipeline is not needed to connect the recycling device 500 and the water tub 100, so that the internal structure of the washing machine is more compact, thereby saving the installation space inside the washing machine.

[0137] In the embodiment, the recycling device 500 can filter the collected sewage, so as to separate the filtered impurities containing microplastics from the water, and facilitate the user to handle the collected filtered impurities. The water outlet is arranged on the recycling device 500, and the filtered water can be directly discharged, which effectively avoids the overflow of the recycling device 500. The discharged water does not contain filtered impurities, and can be introduced into the water tub 100 for the subsequent operation of the washing machine, which helps to save the water consumption of the washing machine.

[0138] Embodiment Four

[0139] The difference between the embodiment and the above-mentioned embodiment three is that the water outlet on the recycling device is in communication with the external discharge pipeline, and the water filtered by the filter assembly is discharged from the washing machine through the external discharge pipeline.

[0140] Since the filter assembly is arranged in the recycling device to filter the collected sewage, the filtered water no longer carries the filtered impurities, and can be directly introduced into the external discharge pipeline to be discharged from the washing machine, which does not cause the problem that the microplastics enter the ecological cycle with the washing machine drainage.

[0141] Compared with the above-mentioned embodiment three, only the direction of the filtered water discharged from the water outlet of the recovery device is changed in this embodiment, and the functions of preventing the overflow of the recovery device and avoiding the direct discharge of the filtered impurities containing microplastics from the washing machine can also be achieved.

[0142] Embodiment five

[0143] The difference between this embodiment and the above-mentioned embodiment three is that the water outlet of the recovery device is connected with a second switching device, and the second switching device controls the water communication between the water tank and the external discharge pipeline and the water outlet.

[0144] In the above-mentioned scheme, the direction of the water flow discharged from the water outlet of the recovery device can be controlled by the second switching device, so that the filtered water in the recovery device can be selectively returned to the water tank or directly discharged from the washing machine.

[0145] Specifically, after the washing drainage is completed, the second switching device controls the water communication between the external discharge pipeline and the water outlet of the recovery device. After the sewage control device controls the water communication between the sewage outlet and the recovery device, the sewage containing the filtered impurities in the filtering device is discharged into the recovery device, filtered by the filtering assembly, and then discharged from the water outlet into the external discharge pipeline and directly discharged from the washing machine. Since the washing drainage contains a high concentration of detergent in addition to the filtered impurities, the detergent in the water cannot be filtered out by the filtering assembly, so the water discharged from the recovery device is not suitable for the subsequent rinsing process. At this time, the water discharged from the recovery device is directly discharged from the washing machine by controlling the second switching device.

[0146] After the intermediate rinsing drainage is completed, the second switching device controls the water communication between the water tank and the water outlet of the recovery device. After the sewage control device controls the water communication between the sewage outlet and the recovery device, the sewage containing the filtered impurities in the filtering device is discharged into the recovery device, filtered by the filtering assembly, and then discharged from the water outlet back into the water tank. The cleanliness of the intermediate rinsing drainage is relatively high, and after the filtered impurities are filtered out in the recovery device, the intermediate rinsing drainage can be returned to the water tank for the subsequent rinsing process, thereby saving the amount of rinsing water used by the washing machine.

[0147] After the final rinsing drainage is completed, the second switching device controls the water communication between the external discharge pipeline and the water outlet of the recovery device. After the sewage control device controls the water communication between the sewage outlet and the recovery device, the sewage containing the filtered impurities in the filtering device is discharged into the recovery device, filtered by the filtering assembly, and then discharged from the water outlet into the external discharge pipeline and directly discharged from the washing machine. Since the washing machine no longer needs to add a large amount of water to the water tank during the subsequent operation, the water discharged from the recovery device can be directly discharged from the washing machine by controlling the second switching device.

[0148] In this embodiment, the washing machine can automatically control the water discharged from the recovery device to return to the water tank or directly discharge from the washing machine according to different operation stages, and the degree of intelligence is higher.

[0149] Example 6

[0150] This embodiment provides a control method for the washing machine described in Embodiment 2 or 3 above.

[0151] like Figures 2 to 5 As shown, specifically, during the drainage stage, the switching mechanism 712 keeps the circulating water outlet 702 blocked and the drain outlet 703 open, and the washing machine alternately performs drainage filtration operation and sewage discharge operation.

[0152] The drainage filtration operation includes: the delivery pump 400 is in the open state, the sealing mechanism 722 seals the sewage outlet 705, and the water in the water tank 100 is filtered by the filtration device 600 and discharged through the external discharge pipe 250.

[0153] The sewage discharge operation includes: the transfer pump 400 is in the off state, the sealing mechanism 722 opens the sewage outlet 705, and the sewage in the filter device 600 is discharged into the sewage pipe 240.

[0154] In the above solution, by alternately performing drainage filtration and sewage discharge operations during the washing machine's drainage process, filter impurities remaining inside the filter device 600 during drainage filtration can be discharged in a timely manner, preventing filter impurities from accumulating inside the filter device 600 and affecting filtration efficiency. Especially when the content of filter impurities 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 filtration operations until drainage is complete.

[0155] In a further embodiment, during the washing machine's drain filtration operation, the delivery pump 400 is intermittently turned on. By intermittently turning on the delivery pump 400, during the periods when the delivery pump 400 is off, the water in the water tank 100 pauses its flow through the filter device 600. Filter impurities adhering to the inside of the filter device 600 can detach and dissolve into the water during this period, and then be discharged with the water flow during the drain operation. This avoids the situation where the water flow through the filter device 600 for an excessively long period, causing filter impurities to adhere too firmly to the inside of the filter device 600 and preventing them from being fully discharged during the drain operation.

[0156] Meanwhile, the intermittent operation of the transfer pump 400 can prevent the transfer pump 400 from working continuously for a long time, thereby preventing the transfer pump 400 from overheating and extending the service life of the transfer pump 400.

[0157] In the specific solution of this embodiment, the drainage filtration operation includes the following steps:

[0158] S1, control the switching mechanism 712 to open the drainage outlet 703;

[0159] S2, start the delivery pump 400 and keep it running for a certain time length;

[0160] S3, stop the delivery pump 400;

[0161] S4, start the driving mechanism 660 to drive the filtering mechanism 620 to rotate in the filtering cavity 610 for a certain time length;

[0162] S5, stop the driving mechanism 660, if the number of times of executing step S2 in the current drainage and filtering operation reaches a preset number, end the drainage and filtering operation, otherwise return to step S2.

[0163] In the above scheme, during the period when the delivery pump 400 is stopped, the filtering mechanism 620 is driven to rotate by the driving mechanism 660, which can make the filtering impurities attached to the outer wall of the filtering mechanism 620 be stripped under the dual action of centrifugal force and turbulent water flow and be mixed into the water in the filtering cavity 610, which helps the filtering impurities attached to the outer wall of the filtering mechanism 620 to be fully stripped off.

[0164] Further, in the execution process of a drainage and filtering operation, the delivery pump 400 is kept running for a first preset time length T1 after being started for the first time, and is kept running for a second preset time length T2 after being started each time thereafter. The first preset time length T1 is greater than the second preset time length T2.

[0165] In the above scheme, 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 be directly written into the control program of the washing machine. Specifically, the first preset time length T1 is the time length experienced by the filtering mesh on the filtering mechanism 620 when most of the mesh holes are covered by filtering impurities during the period when the filtering device 600 is continuously filtering.

[0166] In a drainage and filtering operation, there is basically no filtering impurity attached to the filtering mesh when the delivery pump 400 is started for the first time, so the value of the first preset time length T1 can be relatively large. During the period when the delivery pump 400 is stopped, even if the filtering mechanism 620 rotates at a high speed, it cannot be guaranteed that the filtering impurities attached to the filtering mesh will be completely stripped off, that is, when the delivery pump 400 is started each time thereafter, there can be some filtering impurities attached to the filtering mesh, 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 filtering mesh being blocked and affecting the filtering process.

[0167] Further, the time length for which the filtering mechanism 620 is continuously rotated in step S4 of the embodiment is a third preset time length T3, and the third preset time length T3 is less than the second preset time length T2.

[0168] The specific value of the third preset time length T3 can be obtained through a large number of experiments in advance and be directly written into the control program of the washing machine, so as to ensure that the filtering impurities attached to the filtering mechanism 620 can be fully stripped off.

[0169] As Figure 7 The control flow chart of the washing machine in the draining phase of the present embodiment is shown, including the following steps:

[0170] 11) The switching mechanism opens the draining outlet, guiding the water through the filtering outlet and the external draining pipeline;

[0171] 12) The delivery pump is opened and lasts for a first preset time T1;

[0172] 13) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0173] 14) The driving mechanism is closed, the delivery pump is opened and lasts for a second preset time T2;

[0174] 15) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0175] 16) The driving mechanism is closed, the delivery pump is opened and lasts for a second preset time T2;

[0176] 17) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0177] 18) The driving mechanism is closed, the blocking mechanism opens the sewage outlet, and the filtering device discharges sewage;

[0178] 19) Steps 12) to 18) are executed in a cycle until the draining phase ends.

[0179] In the present embodiment, during the washing / rinsing process of the washing machine, the switching mechanism 712 keeps the circulating water outlet 702 open and blocks the draining outlet 703, and the washing machine alternately executes the circulating filtering operation and the sewage discharge operation.

[0180] The circulating filtering operation includes that the delivery pump 400 is in an open state, the blocking mechanism 722 blocks the sewage outlet 705, and the water in the tub 100 is subjected to the circulating filtering operation.

[0181] Similar to the draining process, when the washing machine performs the circulating filtering operation on the washing / rinsing water during the washing / rinsing process, the circulating filtering operation and the sewage discharge operation are alternately executed, so as to prevent the problem of large accumulation of filtering impurities inside the filtering device 600.

[0182] The specific steps of the circulating filtering operation are consistent with those of the draining filtering operation, and the difference is that the switching mechanism 712 keeps the circulating water outlet 702 open during the circulating filtering operation, instead of the draining outlet 703.

[0183] As Figure 8The control flow chart of the washing machine in the washing / rinsing process of the embodiment is shown, including the following steps:

[0184] 21) The switching mechanism opens the circulating water outlet, guides the filtered water outlet and the water tub;

[0185] 22) The delivery pump is opened and lasts for a first preset time T1;

[0186] 23) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0187] 24) The driving mechanism is closed, the delivery pump is opened and lasts for a second preset time T2;

[0188] 25) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0189] 26) The driving mechanism is closed, the delivery pump is opened and lasts for a second preset time T2;

[0190] 27) The delivery pump is closed, the driving mechanism is opened and lasts for a third preset time T3;

[0191] 28) The driving mechanism is closed, the blocking mechanism opens the sewage outlet, and the filtering device discharges sewage;

[0192] 29) Steps 22) to 28) are executed in cycles until the washing / rinsing process ends, and the preparation of starting the drainage.

[0193] In the embodiment, the washing machine alternately executes the drainage filtering operation and the sewage discharge operation in the drainage stage, and alternately executes the circulating filtering operation and the sewage discharge operation in the washing / rinsing process, so that the filtering impurities remaining in the filtering device 600 can be discharged in time through the sewage outlet 6103, avoiding the accumulation of filtering impurities affecting the filtering efficiency. During the execution of the drainage filtering operation or the circulating filtering operation, the delivery pump 400 is intermittently opened, and the filtering mechanism 620 is driven to rotate by the driving mechanism 660 during the closing of the delivery pump 400, so that the filtering impurities attached to the filtering mechanism 620 can be fully detached and then fully discharged during the execution of the sewage discharge operation. Through the above process, the filtering device 600 can be self-cleaned at any time during the operation of the washing program, avoiding the situation that the filtering device 600 is blocked, and ensuring the filtering efficiency of the washing machine on water.

[0194] Embodiment Seven

[0195] As Figure 5 , Figure 6 , and Figures 7 to 12As shown, the embodiment is a further limitation of the above-mentioned embodiment two, and the washing machine further comprises a suction device, and the suction action can be performed by the suction device to generate a negative pressure environment outside the sewage outlet 705 of the second valve body 721, and then drive the sewage in the filter device 600 to flow out of the sewage outlet 705 of the second valve body 721 under the action of the pressure difference and finally be discharged into the recycling device 500.

[0196] Due to the limitation of the internal space of the washing machine, there may be a long distance between the filter device 600 and the recycling device 500, resulting in a long path required for the sewage to be discharged into the recycling device 500. Without the aid of external force, the sewage in the filter device 600 is difficult to be completely discharged into the recycling device 500. If the setting height of the recycling device 500 is higher than the sewage discharge port 6103 of the filter device 600, the sewage may not be discharged.

[0197] The washing machine generally uses a traditional water pump to provide driving power for water flow, but since the filter device 600 discharges the sewage carrying the filtered impurities into the recycling device 500, using the traditional pumping mode may cause blockage when the sewage passes through the pump body, thereby causing the washing machine to fail.

[0198] In the embodiment, the air pump 810 is used as the suction device. Meanwhile, a one-way sealing member 540 is arranged at the sewage inlet 550 of the recycling device 500 from the outside to the inside. When the filter device 600 needs to discharge sewage, the air pump 810 is controlled to perform the suction action, the sealing member 540 blocks the sewage inlet 550, the air between the sewage outlet 705 and the recycling device 500 is sucked out by the air pump 810, a negative pressure environment is formed in the pipeline outside the sewage outlet 705, and the sewage in the filter device 600 can enter the second valve cavity and be discharged from the sewage outlet 705 under the action of the pressure difference.

[0199] During the opening of the air pump 810, since the sewage inlet 550 of the recycling device 500 is blocked, air cannot enter between the sewage outlet 705 and the recycling device 500 from the sewage inlet 550, a strong pressure difference can be quickly formed inside and outside the sewage outlet 705 of the second valve body 721, and then the sewage in the filter device 600 can be efficiently and rapidly discharged into the recycling device 500 for collection. Meanwhile, the air pump 810 is only used for sucking air to form a negative pressure environment, and the discharged sewage does not pass through the air pump 810, thereby avoiding the problem of pump body blockage caused by water pump delivery.

[0200] In a further scheme of the embodiment, a sewage temporary storage device 820 with an internal cavity is arranged between the sewage outlet 705 and the recycling device 500, the air pump 810 is communicated with the internal cavity of the sewage temporary storage device 820 through a suction pipeline 811 to suck air therein. The water outlet of the sewage temporary storage device 820 is higher than the sewage inlet 550 of the recycling device 500.

[0201] When the sewage needs to be discharged from the sewage filtering device 600, the washing machine sequentially performs the following steps:

[0202] S1, the air pump 810 is controlled to perform a suction action, the sewage inlet 550 of the recovery device 500 is blocked by the blocking piece 540, and the air in the sewage temporary storage device 820 is sucked out;

[0203] S2, the blocking mechanism 722 opens the sewage outlet 705, and the sewage in the filtering device 600 is discharged into the sewage temporary storage device 820 under the action of the pressure difference through the second valve body 721;

[0204] S3, the air pump 810 is closed, the blocking piece 540 opens the sewage inlet 550, and the sewage in the sewage temporary storage device 820 is discharged into the recovery device 500 under the action of gravity.

[0205] In the above scheme, by setting the sewage temporary storage device 820, the sewage can be temporarily stored in the internal cavity of the sewage temporary storage device 820 after being sucked out of the filtering device 600 under the action of the pressure difference. In this way, when the sewage flows out of the filtering device 600 quickly, it is prevented from being sucked into the air pump 810 due to the large suction force of the air pump 810, thereby protecting the air pump 810 and preventing the working performance of the air pump 810 from being affected.

[0206] The blocking mechanism 722 keeps the sewage outlet 705 blocked at the initial stage of the air pump 810 starting to perform the suction action, so that the filtering device 600 and the sewage temporary storage device 820 are not connected, and at the same time, the sewage temporary storage device 820 and the recovery device 500 are not connected due to the presence of the blocking piece 540, so that a more obvious negative pressure environment can be formed in the sewage temporary storage device 820 more quickly. Then, by controlling the blocking mechanism 722 to open the sewage outlet 705, the sewage in the filtering device 600 can be driven by a larger driving force, so that it can be efficiently and fully discharged into the sewage temporary storage device 820.

[0207] Further, a buffer part 830 is arranged between the air pump 810 and the sewage temporary storage device 820, and the buffer part 830 has a buffer chamber inside. The buffer chamber is in communication with the internal cavity of the sewage temporary storage device 820, the suction pipeline 811 is connected with the buffer part 830, and the air pump 810 and the buffer chamber are connected.

[0208] In the above scheme, after the air pump 810 is turned on, the inside of the buffer part 830 and the inside of the sewage temporary storage device 820 can be in a negative pressure state, and then after the blocking mechanism 722 opens the sewage outlet 705, the sewage in the filtering device 600 can be quickly discharged under the action of the pressure difference. By arranging the air pump 810 and the sewage temporary storage device 820, even if a large amount of sewage is discharged and overflows from the sewage temporary storage device 820, the overflowed sewage can be stored in the buffer chamber of the buffer part 830, and will not directly enter the air pump 810.

[0209] In the preferred scheme of the present embodiment, the buffer part 830 is arranged above the sewage temporary storage device 820 and is connected by a vertically extending air passage 831 connected to the top of the sewage temporary storage device 820. The above structure can fully utilize the internal cavity of the sewage temporary storage device 820. When the internal cavity is filled with sewage, the sewage can enter the air passage 831, thereby increasing the amount of sewage that can be accommodated by the sewage temporary storage device 820. On the other hand, the height required for the sewage to enter the buffer part 830 is increased, and the suction force required by the air pump 810 is greater, which can further prevent the sewage temporary storage device 820 from overflowing.

[0210] Similarly, the air pump 810 is arranged above the buffer part 830, and the suction pipe 811 vertically extends to connect the air pump 810 and the buffer chamber of the buffer part 830. In this way, the suction force required for the sewage to enter the air pump 810 is further increased, which further prevents the air pump 810 from being flooded.

[0211] In the present embodiment, the top of the sewage temporary storage device 820 is provided with an air hole 821 for connecting the internal cavity of the sewage temporary storage device 820 and the external space. Especially for the scheme in which the sewage is discharged into the recovery device 500 by gravity, after the air pump 810 is turned off, external air can enter the internal cavity of the sewage temporary storage device 820 through the air hole 821, drive the sewage therein to flow to the recovery device 500, and then make the blocking piece 540 open the sewage inlet 550, so that the sewage is discharged into the recovery device 500.

[0212] In the above scheme, the opening area of the air hole 821 is small, and when the air pump 810 is in an open state to perform a suction action, the air entering the sewage temporary storage device 820 through the air hole 821 will not have a significant impact on the formation of a negative pressure environment. After the air pump 810 is turned off, the air in the sewage temporary storage device 820 is no longer extracted, and due to the arrangement of the air hole 821, the inside of the sewage temporary storage device 820 can quickly recover to near atmospheric pressure, and the entering air can push the sewage to be discharged into the recovery device 500. By arranging the air hole 821 on the sewage temporary storage device 820, the air pressure in the recovery device 500 is avoided to be too large, and after the air pump 810 stops working, the sewage cannot flow into the recovery device 500.

[0213] In this embodiment, the blocking member 540 specifically comprises:

[0214] The base body 541 is mounted on the sewage inlet 550 of the recovery device 500;

[0215] The opening part 542 is relatively movable with the base body 541 to open / close the space between the outside and the inside of the recovery device 500.

[0216] Specifically, the recovery device 500 comprises a housing 510 with a recovery chamber inside, the sewage inlet 550 is arranged on the housing 510, and the outer periphery of the sewage inlet 550 extends from the inner wall of the housing 510 of the recovery device 500 to the inside of the recovery device 500 by a certain length to form a tubular part 551. The base body 541 is mounted at the extended end of the tubular part 551, and the opening part 542 is relatively movable with the extended end of the tubular part 551 to open / close the opening at the extended end of the tubular part 551.

[0217] Further, the base body 541 is sleeved on the extended end of the tubular part 551, and the opening part 542 covers the opening of the tubular part 551 from the outside of the tubular part 551 to achieve blocking, and the opening part 542 is flipped away from the tubular part 551 to open the opening. The structure of the blocking member 540 is simple, and the opening part 542 abuts against the right end surface of the tubular part 551 and cannot be flipped to the inside of the tubular part 551, thereby achieving one-way conduction of the sewage inlet 550 from the outside to the inside.

[0218] In one scheme of this embodiment, the opening part 542 is made of a flexible material capable of elastic deformation, such as rubber or the like. When the air pump 810 is opened, the part of the opening part 542 covering the opening deforms to protrude into the inside of the tubular part 551, thereby achieving blocking of the opening. The opening part 542 can wrap the included angle between the inner wall of the tubular part 551 and the right end surface of the tubular part 551 to a certain extent, thereby increasing the contact area of the opening part 542 with the opening of the tubular part 551. At the same time, the surface of the opening part 542 facing the tubular part 551 is formed as a convex surface, the surface area is increased, that is, the force receiving area of the opening part 542 subjected to the negative pressure adsorption force is increased, thereby the blocking member 540 can achieve better sealing effect on the sewage inlet 550, which is conducive to the rapid formation of the negative pressure environment.

[0219] Further, the opening part 542 is integrally formed with the base body 541, that is, the blocking member 540 is entirely made of a flexible material, and the base body 541 and the opening part 542 do not need an additional connecting structure to achieve the relative movability of the opening part 542 with the base body 541, thereby the opening part 542 can be moved to open / close the opening at the right end of the tubular part 551.

[0220] In another aspect of the embodiment, the opening part of the blocking member is made of hard material, and the surface of the opening part facing the opening of the tubular part is a convex surface protruding towards the inside of the tubular part. Specifically, the opening of the tubular part is circular, the opening part is in the form of a circular sheet, and the surface of the opening part facing the opening of the tubular part is an arc surface protruding in the middle.

[0221] When the opening part blocks the opening of the tubular part, since the opening part has an arc surface and can partially extend into the opening, and the surface of the opening part in contact with the opening of the tubular part is inclined relative to the end surface of the tubular part, the opening can be more firmly blocked, and the sealing effect is better. At the same time, the arc surface structure of the opening part increases the surface area, i.e., the force receiving area of the opening part subjected to the suction force of the air pump, and can further improve the sealing performance, so as to better form a negative pressure environment between the blowdown port of the filtering device and the recovery device.

[0222] Further, the opening part of the blocking member is separately provided from the base body and can be relatively movably connected to the base body. Specifically, the opening part and the base body are rotatably connected, and the opening part opens / blocks the opening of the tubular part through a flipping movement.

[0223] Alternatively, the opening part and the base body can be integrally formed by plastic, and the opening part and the base body are both in a hard state and do not have obvious deformation. The opening part and the base body are connected through a connecting piece with a small thickness, and the connecting piece is thin and can be deformed under a small force, so that the opening part and the base body can be relatively moved.

[0224] In a further aspect of the embodiment, the outer periphery of the sewage inlet 550 extends from the outer wall of the shell 510 of the recovery device 500 to the outside of the recovery device 500 by a certain length to form a connecting part 552, and the connecting part 552 is used to connect with a pipeline and is communicated to the sewage temporary storage device 820 through the pipeline.

[0225] Specifically, the end of the pipeline can be sleeved on the connecting part 552, and the installation is more convenient.

[0226] In the embodiment, the air pump 810 is arranged to suck air between the sewage outlet 705 of the second valve body 721 and the recovery device 500, and the one-way sealing member 540 is arranged at the sewage inlet 550 of the recovery device 500, so that a negative pressure environment is quickly formed outside the sewage outlet 705, the sewage in the filter device 600 is driven to be discharged through the second valve body 721 by the pressure difference, and then the sewage impacts the one-way sealing member 540 to open the sewage inlet 550, and the sewage is collected into the recovery device 500. Even if the distance between the filter device 600 and the recovery device 500 is far or there is a height difference, the sewage in the filter device 600 can be fully discharged. The sewage temporary storage device 820 is arranged between the filter device 600 and the recovery device 500, and the sewage temporary storage device 820 is in communication with the air pump 810 through the buffer portion 830, so that the air pump 810 is prevented from sucking in sewage when sucking air.

[0227] Embodiment Eight

[0228] As shown in Figure 5 and Figures 13 to 17 , the embodiment is a further limitation of the above-mentioned embodiment seven, and the washing machine further comprises an isolation mechanism arranged between the sewage outlet 705 and the air pump 810, which can gradually disconnect the communication between the air pump 810 and the sewage outlet 705 with the discharge of the sewage, so as to prevent the sewage discharged from the filter device 600 from being too large when the air pump 810 continuously sucks, and the sewage is sucked into the air pump 810. Thus, the air pump 810 can be protected, and the sewage can be prevented from entering the air pump 810 to affect its working performance.

[0229] In the specific scheme of the embodiment, the isolation mechanism comprises a floating member, and an air hole 832 is arranged on the communication path between the air pump 810 and the sewage outlet 6103. During the process of discharging the sewage, the floating member rises to the air hole 832 below to block the air hole 832.

[0230] In the embodiment, the floating member is a floating ball 822, and the diameter of the floating ball 822 is greater than the diameter of the air hole 832.

[0231] As a first implementation manner of the embodiment, as shown in Figures 12 to 15 , the floating ball 822 is arranged inside the sewage temporary storage device 820, and the air hole 832 is arranged on the top wall of the sewage temporary storage device 820. Preferably, the isolation mechanism further comprises a guide portion 823 extending from the bottom of the sewage temporary storage device 820 to the air hole 832, and the guide portion 823 has a hollow channel, and the floating ball 822 is arranged in the hollow channel.

[0232] As shown in Figure 13 and Figure 14As shown, in the initial state, there is no water in the sewage temporary storage device 820, and the floating ball 822 is located at the bottom end of the guide portion 823. During the process of discharging sewage into the sewage temporary storage device 820, the water level in the sewage temporary storage device 820 gradually rises. The side wall of the guide portion 823 is provided with a through hole for connecting the hollow channel with the space outside the guide portion 823. The water level inside the guide portion 823 rises synchronously, and the floating ball 822 always floats at the water level and gradually rises as the water level rises. As shown in Figure 15 and Figure 16 As shown, when the sewage temporary storage device 820 is filled with water, the floating ball 822 rises with the water level to the top of the sewage temporary storage device 820, and blocks the air vent 832 from below, so that the sewage cannot overflow further upward through the air vent 832, ensuring that the sewage cannot overflow from the air vent 832 into the air pump 810.

[0233] The guide portion 823 is a circular tube structure, and the inner diameter of the guide portion 823 is greater than the outer diameter of the floating ball 822. The floating ball 822 and the guide portion 823 form a clearance fit, which reduces or even eliminates the frictional resistance of the floating ball 822 when reciprocating inside the guide portion 823, thereby avoiding the situation that the floating ball 822 is stuck inside the guide portion 823 and cannot rise with the water level.

[0234] Preferably, the guide portion 823 is vertically arranged inside the sewage temporary storage device 820, which is more conducive to the floating ball 822 rising without obstruction to block the air vent 832 as the water level rises.

[0235] In the above scheme, the lower end of the air vent pipe 831 is connected to the top wall of the sewage temporary storage device 820, and the connection between the air vent pipe 831 and the sewage temporary storage device 820 forms the air vent 832. The diameter of the floating ball 822 is greater than the diameter of the air vent pipe 831, and the floating ball 822 blocks the air vent 832 as it rises with the water level, that is, the floating ball 822 moves to the lower end of the air vent pipe 831 to block the opening of the lower end of the air vent pipe 831.

[0236] As a second embodiment of the present embodiment, the isolation mechanism composed of the floating ball and the guide portion is arranged inside the buffer portion.

[0237] Specifically, the top wall of the buffer portion is provided with an air vent, and is connected to the air pump through a suction pipe. The buffer portion is provided with a guide portion vertically extending from the bottom to the air vent, the side wall of the guide portion has a through hole, and the floating ball is arranged inside the guide portion.

[0238] When the sewage temporary storage device overflows, the sewage enters the buffer portion along the aeration pipeline, gradually accumulates in the buffer cavity of the buffer portion, and is not directly sucked into the air pump. In the process of the sewage entering the buffer portion, the water level in the buffer portion gradually rises, and the float ball gradually rises in the guide portion as the water level rises, and approaches the aeration hole at the top. When the buffer portion is also filled with sewage, the float ball rises to the uppermost end of the guide portion, and can block the aeration hole at the lower end of the suction pipeline, so as to prevent the sewage from overflowing from the buffer portion and being sucked into the air pump.

[0239] As a third implementation of the embodiment, as shown in Figure 17 The sewage temporary storage device 820 and the buffer portion 830 are both provided with a separation mechanism composed of a float ball 822 and a guide portion 823. The top wall of the sewage temporary storage device 820 and the top wall of the buffer portion 830 are respectively provided with an aeration hole 832 that can be blocked by the corresponding float ball 822.

[0240] Specifically, the lower end of the aeration pipeline 831 is connected to the top wall of the sewage temporary storage device 820, forming an aeration hole 832. The lower end of the suction pipeline 811 is connected to the top wall of the buffer portion 830, forming another aeration hole 832.

[0241] Under normal circumstances, when the filter device 600 discharges sewage, the float ball 822 in the sewage temporary storage device 820 rises with the water level, and can block the aeration hole 832 when moving to the top of the sewage temporary storage device 820, so as to prevent the sewage from overflowing from the sewage temporary storage device 820. However, when the float ball 822 in the sewage temporary storage device 820 is accidentally stuck and cannot move, the aeration pipeline 831 and the sewage temporary storage device 820 always maintain communication with each other. Under the condition that the filter device 600 continuously discharges sewage, the sewage enters the buffer portion 830 along the aeration pipeline 831.

[0242] If the sewage continuously enters the buffer portion 830, the float ball 822 in the buffer portion 830 gradually rises with the water level. When the buffer portion 830 is also filled with sewage, the float ball 822 can block the aeration hole 832 on the top wall of the buffer portion 830, i.e., the lower end of the suction pipeline 811 is sealed, so that the sewage cannot overflow from the buffer portion 830 into the air pump 810.

[0243] In the embodiment, by providing the float ball 822 and the guide portion 823 in the sewage temporary storage device 820 and / or the buffer portion 830, the float ball 822 can block the aeration hole 832 above when the sewage fills the sewage temporary storage device 820 / the buffer portion 830, so as to prevent the sewage from overflowing from the aeration hole 832, and further prevent the sewage from overflowing into the air pump 810, thereby ensuring the working performance of the air pump 810.

[0244] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content with the above-mentioned prompt as equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A washing machine comprising: a water tub; an external drainage pipeline for draining water outside the washing machine; a filter device for receiving water in the water tub to filter, having a water inlet, a filtered water outlet and a sewage outlet; characterized in that the filtered water outlet is directly or indirectly communicated with the external drainage pipeline, and the water in the water tub is drained by the external drainage pipeline after being filtered by the filter device to remove filtering impurities; the washing machine further comprising: a recovery device for collecting sewage carrying filtering impurities discharged from the sewage outlet; a sewage control device comprising a second valve body having a second valve cavity, a sewage inlet and a sewage outlet being provided on the second valve body, and the sewage inlet being communicated with the sewage outlet; a sewage temporary storage device having an internal cavity being provided between the sewage outlet and the recovery device; a buffer portion having a buffer cavity being provided between the air pump and the sewage temporary storage device, and the buffer cavity being communicated with the internal cavity of the sewage temporary storage device; a suction device, which is an air pump, performing a suction action to generate a negative pressure environment outside the sewage outlet of the second valve body, and driving the sewage in the filter device to flow out through the sewage outlet of the second valve body under the action of pressure difference.

2. A laundry washing machine according to Claim 1, characterized in that a first switching device being provided between the filtered water outlet and the external drainage pipeline, and controlling the water tub and the external drainage pipeline to be selectively communicated with the filtered water outlet of the filter device.

3. A laundry washing machine according to Claim 2, characterized in that a delivery pump being provided between the water tub and the water inlet of the filter device, and delivering water in the water tub to the filter device.

4. A laundry washing machine according to Claim 2, characterized in that the first switching device comprising a first valve body having a first valve cavity, a water inlet being provided on the first valve body and communicated with the filtered water outlet, a circulating water outlet being provided on the first valve body and communicated with the water tub, and a drainage outlet being provided on the first valve body and communicated with the external drainage pipeline; a switching mechanism being provided in the first valve cavity, and selectively opening the circulating water outlet and the drainage outlet.

5. A laundry washing machine according to Claim 4, characterized in that the switching mechanism comprising: a flap being rotatably installed in the first valve cavity, and having a first surface and a second surface being opposite to each other; a drainage sealing member being provided on the first surface of the flap, and used for blocking the drainage outlet; a circulating sealing member being provided on the second surface of the flap, and used for blocking the circulating water outlet.

6. A laundry washing machine according to Claim 5, characterized in that the first switching device further comprising a first driving element for driving the flap to rotate in the first valve cavity.

7. A laundry washing machine according to any one of the preceding claims, characterized in that, a blocking mechanism being provided in the second valve cavity, and used for blocking the sewage inlet or the sewage outlet.

8. A laundry washing machine according to Claim 7, characterized in that the sewage control device further comprising a second driving element for driving the blocking mechanism to move in the second valve cavity, so as to open or block the sewage inlet, or to open or block the sewage outlet.

9. A laundry washing machine according to Claim 7, characterized in that the first switching device of the washing machine comprising a first valve body having a first valve cavity; the second valve body being connected with the first valve body as a whole, and the first valve cavity and the second valve cavity being independent of each other.

10. A laundry washing machine according to any one of the preceding claims 1-6, characterized in that, the recovery device comprising: a housing having a recovery cavity inside; a filter assembly being provided in the recovery cavity, and separating the recovery cavity into a first chamber and a second chamber; sewage carrying filtering impurities entering the first chamber, and entering the second chamber after being filtered by the filter assembly, and filtering impurities being collected in the first chamber.

11. A laundry washing machine according to Claim 10, characterized in that a water outlet being provided on the recovery device and communicated with the second chamber, and used for discharging water filtered by the filter assembly.

12. A laundry washing machine according to Claim 11, characterized in that The water outlet is communicated with the water containing cylinder, and the filtered water is introduced into the water containing cylinder; and / or the water outlet is communicated with the external discharge pipeline, and the filtered water is discharged through the external discharge pipeline.

13. A laundry washing machine according to Claim 12, characterized in that The water outlet is connected with the second switching device, and the second switching device controls the water containing cylinder and the external discharge pipeline to be in communication with the water outlet alternatively.

14. A laundry washing machine according to any one of the preceding claims 1-6, characterized in that, A tee structure is arranged between the water containing cylinder and the water inlet of the filtering device, the tee structure is communicated with the external discharge pipeline, and a controllable valve is arranged between the tee structure and the external discharge pipeline.

15. A control method of the washing machine according to any one of claims 1 to 14, characterized in that, A conveying pump is arranged between the water containing cylinder and the water inlet of the filtering device; in the draining stage of the washing machine, the conveying pump is started, the water in the water containing cylinder is introduced into the filtering device, and the filtered impurities are filtered out and discharged through the external discharge pipeline.

16. The control method of the washing machine according to claim 15, characterized in that, The washing machine further comprises a sewage control device for controlling the communication or disconnection between the recovery device and the sewage outlet of the filtering device. In the sewage discharge process of the filtering device, the sewage control device connects the recovery device and the sewage outlet of the filtering device, the sewage carrying the filtered impurities is discharged through the sewage outlet and collected in the recovery device.

17. The control method of the washing machine according to claim 16, characterized in that, The washing machine further comprises a first switching device for controlling the communication of the water containing cylinder and the external discharge pipeline with the filtered water outlet of the filtering device alternatively. In the washing or rinsing process, the first switching device connects the water containing cylinder and the filtered water outlet of the filtering device, and the conveying pump is started, so that the water in the water containing cylinder is circulated through the filtering device to filter out the filtered impurities in the water. In the draining stage of the washing machine, the first switching device connects the external discharge pipeline and the filtered water outlet of the filtering device, and the conveying pump is started, so that the water in the water containing cylinder is filtered through the filtering device and then discharged through the external discharge pipeline.

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