A washing machine

Abstract

The present application belongs to the technical field of washing machines, and discloses a washing machine, which comprises a water containing cylinder, a filtering device in communication with the water containing cylinder, a suction device and a recovery device.The filtering device receives water in the water containing cylinder to filter the water, and has a sewage outlet for discharging sewage outward.The suction device performs a suction action to discharge the sewage in the filtering device through the sewage outlet.The recovery device collects the sewage discharged by the suction device and filters the sewage, and the filtered water is introduced into the water containing cylinder.In the present application, the suction device provides driving force for discharging the sewage in the filtering device, and the discharged sewage is collected in the recovery device, so that the microplastics carried by the sewage are prevented from being directly discharged, and the sewage is filtered in the recovery device and then introduced into the water containing cylinder again, which can be used for subsequent washing process or discharged through the water containing cylinder, so that the recovery device is prevented from overflowing.

Description

TECHNICAL FIELD

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

[0002] In the process of washing clothes by the washing machine, due to the friction between clothes and clothes, and between clothes and the washing machine itself, lint will fall off the clothes and mix into the washing water. If the lint in the washing water cannot be removed, it may 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 filtering impurities such as lint, which will affect the filtering effect of the filter and cause the blockage of the drain valve / drain pump, and bacteria are likely to breed in the filter, so the filter needs to be cleaned in time, otherwise the washing water will be polluted and the clothes will be polluted again, affecting the health of the user. However, most washing machines need the user to take down the filter for manual cleaning, which is inconvenient to operate.

[0004] In view of the above problems, the existing technology proposes a filter device with a self-cleaning function, which can automatically discharge the attached filtering impurities. Most washing machines using the above filter device directly discharge the sewage carrying the filtering impurities into the drain flow of the washing machine after completing the self-cleaning of the filter device, which brings the following problems.

[0005] Problem one, due to the relatively compact space inside the washing machine, the sewage discharge path of the filter device is relatively long, and there may be a certain height difference, so that the sewage in the filter device is difficult to be fully discharged without the aid of driving force.

[0006] Problem two, in recent years, the concept of microplastics has been proposed in the environmental protection field and gradually received increasing attention. Microplastics generally refer to plastic fragments and particles with a diameter of less than 5 millimeters, which are mixed into the water environment of nature. Due to the high specific surface area, microplastics can easily adsorb organic pollutants in water to form organic pollution spheres. 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 accumulated microplastics in the body, which may cause the accumulation of microplastics in the human body and affect human health.

[0007] An important source of microplastics is found to be the 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 drain water and become microplastics mixed into the natural water environment. At the same time, microplastics can also come from industrial products made of plastic materials. The outer barrel, drain pipe and other structures of the washing machine are generally made of plastic and will inevitably produce plastic debris 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 environmental protection field. The washing machine with a self-cleaning function of the filter device in the prior art has the problem of high content of microplastics in the washing machine drainage because the filter impurities containing microplastics directly flow into the washing machine drainage.

[0008] Problem three, to avoid direct discharge of filter impurities, a collection cavity can be set to collect the sewage discharged by the filter device. However, the filter device in the prior art is mostly flushed by water flowing into the interior to remove the attached filter impurities, thereby causing a large amount of sewage to be discharged. To prevent the discharged sewage from overflowing from the collection cavity, the volume of the collection cavity needs to be increased, resulting in a large occupation of the internal space of the washing machine.

[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 filter device, which is provided with a recovery device to collect and filter the sewage discharged by the filter device and then enter the water containing barrel again, effectively preventing the problem of overflow of the recovery device. At the same time, the sewage in the filter device is driven to flow into the recovery device by the suction device to form a pressure difference, ensuring that the sewage in the filter device can be fully discharged.

[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] a water containing barrel;

[0014] a filter device, which is in communication with the water containing barrel, receives water in the water containing barrel for filtration, and has a sewage discharge port for discharging sewage outward;

[0015] characterized in that it further comprises:

[0016] a suction device, which performs a suction action to drive the sewage in the filter device to be discharged through the sewage discharge port under the action of a pressure difference;

[0017] a recovery device, which collects and filters the sewage discharged by the filter device, and the filtered water flows into the water containing barrel.

[0018] Further, the washing machine further comprises a detergent feeding device, which is in communication with the water tub and is used for feeding detergent into the water tub; the recovery device is in communication with the detergent feeding device, and the filtered water in the recovery device is introduced into the water tub through the detergent feeding device.

[0019] Further, the detergent feeding device comprises a water inlet box, which is in communication with the water tub; the recovery device comprises a housing and a filter assembly arranged in the housing, the filter assembly is used for filtering the collected sewage; the housing is provided with a water outlet, which is used for discharging the filtered water, and the water outlet is in communication with the water inlet box.

[0020] Further, the housing has a recovery chamber inside, and the filter assembly divides the recovery chamber into a first chamber and a second chamber, and the water outlet of the housing is in communication with the second chamber.

[0021] The sewage carrying impurities enters the first chamber and enters the second chamber after being filtered by the filter assembly, and the impurities are collected in the first chamber.

[0022] Preferably, the first chamber is arranged above the second chamber.

[0023] Further, the housing of the recovery device is arranged inside the water inlet box, and the filtered water in the recovery device flows out of the water outlet and directly into the water inlet box;

[0024] Preferably, the housing is inserted / extracted inside the water inlet box;

[0025] More preferably, the filter assembly is detachably mounted inside the housing.

[0026] Further, the water outlet and the water inlet box are in communication through a pipeline, the filtered water in the recovery device is discharged from the water outlet and enters the water inlet box through the pipeline;

[0027] Preferably, the housing is inserted / extracted inside the cabinet of the washing machine;

[0028] More preferably, the filter assembly is detachably mounted inside the housing.

[0029] Further, the water inlet box is connected to a water inlet pipe, and the water inlet pipe is in communication with the water tub;

[0030] Preferably, the water outlet end of the water inlet pipe is connected to the water tub, and the water inlet pipe comprises a corrugated pipe with a certain length.

[0031] Further, the sewage outlet of the filter device is communicated with a sewage temporary storage device having an internal cavity, the sewage temporary storage device is communicated with a recovery device, the suction device is communicated with the internal cavity of the sewage temporary storage device to suck air in the internal cavity of the sewage temporary storage device.

[0032] Further, a buffer part is arranged between the suction device and the sewage temporary storage device, the buffer part has a buffer cavity inside, and the buffer cavity is respectively communicated with the internal cavity of the sewage temporary storage device and the suction device.

[0033] Further, an openable / closable sewage control valve is arranged between the filter device and the sewage temporary storage device.

[0034] After the above technical scheme is adopted, the present application has the following beneficial effects compared with the prior art.

[0035] In the present application, the suction device sucks air in the space outside the sewage outlet, a pressure difference is formed inside and outside the sewage outlet of the filter device, and driving force is provided for the discharge of sewage in the filter device, so that the situation that the sewage cannot be discharged due to too long distance or height difference between the filter device and the recovery device is avoided. The recovery device can collect the sewage discharged from the filter device, so that the lint and other filtering impurities carried in the sewage are prevented from being directly discharged from the washing machine, and the microplastics in the filtering impurities are prevented from entering the ecological cycle with the water flow, thereby affecting the ecological environment and human health. At the same time, the recovery device can also filter the collected sewage, and the filtered water is re-input into the water tub, which can be used for subsequent washing process or discharged through the drain pipe connected to the water tub, so that the filtering impurities are prevented from being discharged with the water, and the overflow of the recovery device is also effectively prevented.

[0036] In the present application, the recovery device is communicated with the water inlet box of the detergent feeding device, the filtered water in the recovery device is input into the water tub through the water inlet box, so that the situation that the filtered water is difficult to be input into the water tub due to long distance between the recovery device and the water tub is avoided. When the recovery device is arranged inside the water inlet box, the space inside the water inlet box can be fully utilized, and the pipeline structure for communicating the recovery device with the water inlet box is omitted, so that the occupation of the internal space of the washing machine is reduced, and the miniaturization design of the washing machine is facilitated.

[0037] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of the washing machine in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the washing machine in Embodiment 1 of the present invention;

[0041] Figure 3 This is a schematic diagram of the connection structure between the filtration device and the recycling device in Embodiment 1 of the present invention;

[0042] Figure 4 This is a partial enlarged view (normal state) of the wastewater inlet of the recycling device in Embodiment 3 of the present invention;

[0043] Figure 5 This is a partial enlarged view of the sewage inlet of the recycling device in Embodiment 3 of the present invention (the blocked state when the air pump is turned on);

[0044] Figure 6 This is a partial enlarged view of the sewage inlet of the recycling device in Embodiment 3 of the present invention (open state after the air pump is turned off);

[0045] Figure 7 This is a schematic diagram of the sealing component in Embodiment 3 of the present invention;

[0046] Figure 8 This is a schematic diagram of the connection structure between the filtration device and the recovery device in Embodiment 4 of the present invention (there is no water in the wastewater storage device);

[0047] Figure 9 This is the present invention. Figure 8 Enlarged view of point A in the middle;

[0048] Figure 10 This is a schematic diagram of the connection structure between the filtration device and the recycling device in Embodiment 4 of the present invention (the sewage storage device is full of water);

[0049] Figure 11 This is the present invention. Figure 10 Enlarged view of point B in the middle;

[0050] Figure 12 This is a schematic diagram of the connection structure between the filtration device and the recycling device in Embodiment Six of the present invention.

[0051] In the figure: 10, box; 100, water tank; 110, window pad; 210, drainage pipeline; 220, circulating pipeline; 230, backwater pipeline; 240, sewage pipeline; 241, sewage control valve; 250, external discharge pipeline; 260, water tank drainage pipe; 270, switching device; 300, water inlet box; 310, water inlet pipe; 400, circulating pump; 500, recovery device; 510, shell; 520, filter assembly; 531, first chamber; 532, second chamber; 540, blocking piece; 541, base body; 542, opening part; 550, sewage inlet; 551, tubular part; 552, connecting part; 600, filter device; 610, filter cavity; 6101, water inlet; 6102, filtered water outlet; 6103, sewage outlet; 620, filtering mechanism; 621, water outlet joint; 660, driving mechanism; 680, cleaning particles; 690, baffle; 810, air pump; 811, suction pipeline; 820, sewage temporary storage device; 821, air hole; 822, floating ball; 823, guide part; 830, buffer part; 831, air vent pipeline; 832, air vent hole.

[0052] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but not to limit the scope of the present application.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0055] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] Embodiment one

[0057] As Figures 1 to 3As shown, the washing machine described in the embodiment includes:

[0058] The water tub 100;

[0059] The filter device 600 is in communication with the water tub 100 and receives water in the water tub 100 for filtration, and has a sewage outlet 6103 for discharging sewage outward;

[0060] The suction device performs a suction action to suck out the sewage in the filter device 600 through the sewage outlet 6103;

[0061] The recycling device 500 is used to collect the sewage sucked out by the suction device.

[0062] In the embodiment, the washing machine is provided with a circulating filtration pipeline having two ends in communication with the water tub 100, and the filter device 600 is arranged on the circulating filtration pipeline. The circulating pump 400 is further arranged on the circulating filtration pipeline, and the water in the water tub 100 is continuously circulated through the circulating filtration pipeline by the circulating pump 400, so that the lint and other filtration impurities in the water can be removed when passing through the filter device 600, thereby reducing the content of lint in the water and improving the washing effect of the clothes.

[0063] The filter device 600 is provided with the sewage outlet 6103, and the filtration impurities remaining in the filter device 600 after filtration can be discharged from the sewage outlet 6103 along with the water flow, without the need for the user to take out the filter device 600 for manual cleaning, and the use is more convenient. The recycling device 500 is in communication with the sewage outlet 6103 of the filter device 600, and the sewage carrying the filtration impurities discharged from the sewage outlet 6103 can enter the recycling device 500 for collection, and will not be discharged from the washing machine along with the drainage water flow. Through the above method, the microplastics in the filtration impurities are prevented from being discharged along with the water flow and entering the ecological cycle, thereby causing harm to the ecological environment and human health.

[0064] Due to the limitation of the internal space of the washing machine, the filter device 600 and the recycling device 500 may be far apart, resulting in a long path required for the sewage to be discharged into the recycling device 500. Figure 1 As shown, in the embodiment, the recycling device 500 and the filter device 600 are arranged on the left and right side regions of the top of the cabinet 10 of the washing machine, and under the condition of not relying on 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 outlet 6103 of the filter device 600, the sewage may not be discharged.

[0065] To solve the problem of discharging the sewage from the filter device 600 into the recycling device 500, the washing machine in the embodiment is provided with the suction device, which can suck out the sewage in the filter device 600 by performing a suction action and deliver it to the recycling device 500.

[0066] The laundry machine generally uses a traditional water pump to provide driving power for water flow, but since the filter device 600 discharges sewage carrying filter impurities into the recovery device 500, the traditional pumping mode may cause blockage when the sewage passes through the pump body, thereby causing the laundry machine to malfunction.

[0067] In this embodiment, the air pump 810 is used as the suction device, and a pressure difference is generated inside and outside the sewage discharge port 6103 through the suction action of the air pump 810, thereby sucking out the sewage without contacting the sewage and sending it into the recovery device 500. Specifically, when the filter device 600 needs to discharge sewage, the air pump 810 is controlled to perform a suction action, and the air in the space outside the sewage discharge port 6103 is sucked out by the air pump 810, so that the pipeline outside the sewage discharge port 6103 forms a negative pressure environment, and the sewage in the filter device 600 can be sucked out under the action of the pressure difference, and then enter the recovery device 500.

[0068] In the above manner, the sewage in the filter device 600 can be efficiently and quickly discharged into the recovery device 500 for collection, and at the same time, the air pump 810 is only used to suck 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.

[0069] In this embodiment, the recovery device 500 also directly or indirectly communicates with the water tub 100, and can filter the collected sewage, and then pass the filtered water into the water tub 100. Through the above structure, the filter impurities in the sewage can be collected in the recovery device 500, and the clean water filtered without filter impurities can be passed into the water tub 100 for subsequent washing process, or be discharged from the water tub 100 through the water tub drain pipe 260 connected to the water tub 100 and finally be discharged from the laundry machine. This can not only avoid the filter impurities being discharged with the drain water flow of the laundry machine to affect the ecological environment, but also avoid the sewage being continuously accumulated in the recovery device 500 to cause the recovery device 500 to overflow. In this way, the volume of the recovery device 500 itself does not need to be set too large, and the installation space occupied by the recovery device 500 in the laundry machine can be saved.

[0070] In a further scheme of this embodiment, the laundry machine further includes a detergent dispensing device in communication with the water tub 100, for dispensing detergent into the water tub 100. The recovery device 500 communicates with the detergent dispensing device, and the filtered water in the recovery device 500 is passed into the water tub 100 through the detergent dispensing device.

[0071] Specifically, the detergent dispensing device comprises a water inlet box 300 in communication with the water tub 100, the recovery device 500 comprises a housing 510, and a filter assembly 520 is arranged inside the housing 510 and used for filtering the collected sewage. An outlet (not shown in the figure) is arranged on the housing 510 and used for discharging the filtered water, and the outlet is in communication with the water inlet box 300.

[0072] In the above scheme, since the water inlet box 300 itself is used for water inlet of the water tub 100, the recovery device 500 recovers water to the water tub 100 through the water inlet box 300 of the detergent dispensing device, and it is not necessary to additionally add a structure for communication between the recovery device 500 and the water tub 100, which is beneficial to simplify the water path structure inside the washing machine and avoid a too long water path.

[0073] Further, the housing 510 has a recovery chamber inside, the filter assembly 520 divides the recovery chamber into a first chamber 531 and a second chamber 532, and the outlet on the housing 510 is in communication with the second chamber 532. The sewage carrying the filtered impurities enters the first chamber 531 of the recovery device 500, enters the second chamber 532 after being filtered by the filter assembly 520, and the filtered impurities are collected in the first chamber 531.

[0074] Specifically, the filter assembly 520 can be a frame arranged horizontally at a certain height inside the recovery chamber and a filter screen laid on the frame, and the filter assembly 520 forms the first chamber 531 on the upper side and the second chamber 532 on the lower side. By arranging the first chamber 531 and the second chamber 532 in the housing 510 in a vertical manner through the filter assembly 520, after the sewage carrying the filtered impurities enters the first chamber 531, the water can enter the second chamber 532 through the filter assembly 520 under the action of gravity, and the filtered impurities are blocked by the filter screen and remain on the upper surface of the filter assembly 520.

[0075] The filter screen of the filter assembly 520 can filter microplastics in the sewage and prevent the microplastics from mixing into the water body.

[0076] In a further scheme of the embodiment, the housing 510 of the recovery device 500 is arranged inside the water inlet box 300, and the filtered water in the recovery device 500 flows out of the outlet and directly enters the water inlet box 300.

[0077] Since the water inlet box 300 has a certain space inside, the recovery device 500 is arranged as a whole inside the water inlet box 300, and the filtered water flows out of the outlet and enters the water inlet box 300, thereby achieving the purpose of passing the filtered water into the water inlet box 300. Meanwhile, the internal space of the water inlet box 300 can be fully utilized, so that the recovery device 500 does not separately occupy part of the space inside the washing machine, which is beneficial to save installation space.

[0078] In another aspect, the water outlet of the recycling device 500 is located inside the water inlet box 300, and no additional pipeline is needed to connect the water outlet and the water inlet box 300 to deliver the filtered water in the recycling device 500 to the water inlet box 300, thereby simplifying the pipeline structure inside the washing machine. The simplified pipeline structure makes the internal structure of the washing machine more compact, reduces the space occupied by the peripheral structure of the tub 100, and helps the miniaturization design of the washing machine under the premise of ensuring the capacity of the washing machine.

[0079] In a further aspect of the embodiment, the shell 510 is inserted / extracted inside the water inlet box 300. Specifically, the water inlet box 300 is arranged close to the inner wall of the cabinet 10 of the washing machine, and the user can insert or extract the shell 510 into / from the cabinet 10. The upper side of the shell 510 is open, and when the user extracts the shell 510, the user can clean the filtered impurities attached to the upper surface of the filter assembly 520 through the opening of the upper side of the shell 510. The filter assembly 520 is preferably detachably connected to the shell 510, and the user can detach the filter assembly 520 from the inside of the shell 510 and take it out for cleaning, which is more convenient to operate.

[0080] In a further aspect of the embodiment, the water inlet box 300 is connected to the water inlet pipe 310, and the water inlet pipe 310 is connected to the tub 100. Preferably, the water outlet end of the water inlet pipe 310 is connected to the tub 100, and the water inlet pipe 310 includes a corrugated pipe with a certain length.

[0081] In the above aspect, the water inlet box 300 is directly connected to the tub 100 through the water inlet pipe 310, and the filtered water discharged from the recycling device 500 can be delivered into the tub 100. Since the tub 100 vibrates to a certain extent during the operation of the washing machine, the water inlet pipe 310 includes at least a corrugated pipe, so that the displacement caused by the vibration of the tub 100 can be absorbed by the corrugated pipe, avoiding the loosening of the connection structure between the tub 100 and the water inlet pipe 310 due to the vibration of the tub 100, which causes water leakage.

[0082] In the embodiment, the sewage outlet 6103 of the filter device 600 is connected to the sewage temporary storage device 820 having an internal cavity, the sewage temporary storage device 820 is connected to the recycling device 500, the air pump 810 is connected to the internal cavity of the sewage temporary storage device 820 to suck the air inside the sewage temporary storage device 820, and the water outlet of the sewage temporary storage device 820 is higher than the sewage inlet of the recycling device 500.

[0083] Further, an openable / closable sewage control valve 241 is arranged between the filter device 600 and the sewage temporary storage device 820. Specifically, the sewage outlet 6103 and the sewage temporary storage device 820 are connected through a sewage pipeline 240, and the sewage control valve 241 is arranged on the sewage pipeline 240 to control the opening and closing of the sewage pipeline 240.

[0084] In the above scheme, when the circulating pump 400 drives the water in the water tank 100 to circulate and filter, the blowdown control valve 241 is in the closed state, and the blowdown pipeline 240 is disconnected. When it is necessary to discharge the sewage in the filtering device 600, the washing machine sequentially executes the following steps:

[0085] S1, the air pump 810 is controlled to execute the suction action, and the air in the sewage temporary storage device 820 is sucked out;

[0086] S2, the blowdown control valve 241 is opened, the blowdown pipeline 240 is connected, and the sewage in the filtering device 600 is discharged into the sewage temporary storage device 820 under the action of the pressure difference;

[0087] S3, the air pump 810 is closed, and the sewage in the sewage temporary storage device 820 is discharged into the recovery device 500 under the action of gravity.

[0088] In the above scheme, by arranging the sewage temporary storage device 820, the sewage is temporarily stored in the internal cavity of the sewage temporary storage device 820 after being sucked out from the filtering device 600 under the action of the pressure difference. In this way, the situation that the sewage is sucked into the air pump 810 due to the large suction force of the air pump 810 when the sewage flows out of the filtering device 600 is avoided, which protects the air pump 810 and prevents the working performance of the air pump 810 from being affected.

[0089] The blowdown control valve 241 is kept in the closed state at the initial stage when the air pump 810 starts to execute the suction action, and the filtering device 600 is not connected with the sewage temporary storage device 820, so that a more obvious negative pressure environment can be formed in the sewage temporary storage device 820 more quickly. Then, the blowdown control valve 241 is opened, and the sewage in the filtering device 600 can be driven by a larger driving force, so that the sewage is efficiently and sufficiently discharged into the sewage temporary storage device 820.

[0090] The volume of the sewage temporary storage device 820 is preferably greater than the volume of the filtering device 600, or at least greater than the maximum sewage amount that can be stored in the filtering device 600, so as to ensure that the sewage in the filtering device 600 is completely discharged without causing the sewage temporary storage device 820 to overflow, thereby effectively preventing the air pump 810 from being filled with water.

[0091] In a further scheme of the embodiment, the air pump 810 is a bidirectional pump that has the function of sucking air and can also introduce air into the sewage temporary storage device 820. In the above step S3, the air pump 810 is first closed to stop sucking air, and then the air pump 810 is opened again and controlled to operate in reverse to introduce air into the sewage temporary storage device 820, which can drive the sewage in the sewage temporary storage device 820 to be discharged into the recovery device 500.

[0092] In another aspect of the embodiment, the air pump 810 is a suction pump having only suction function. The washing machine further comprises a gas charging device (not shown in the figure) such as a gas charging pump, which is in communication with the sewage temporary storage device 820. In the above aspect, the step S3 comprises: closing the air pump 810, opening the gas charging device, charging air into the sewage temporary storage device 820, and driving the sewage in the sewage temporary storage device 820 to flow into the recovery device 500.

[0093] Further, a buffer 830 is arranged between the air pump 810 and the sewage temporary storage device 820, and the buffer 830 has a buffer chamber inside. The buffer chamber is in communication with the internal cavity of the sewage temporary storage device 820, and the suction pipeline 811 is connected with the buffer 830 to guide the air pump 810 to the buffer chamber.

[0094] In the above aspect, the air pump 810 can suck the inside of the buffer 830 and the inside of the sewage temporary storage device 820 to a negative pressure state after being turned on, and then the sewage in the filter device 600 can be quickly discharged under the action of pressure difference after the sewage control valve 241 is opened. By arranging the buffer 830 between the air pump 810 and the sewage temporary storage device 820, even if the sewage temporary storage device 820 overflows, the overflowed sewage can be stored in the buffer chamber of the buffer 830, and will not directly enter the air pump 810.

[0095] In a preferred aspect of the embodiment, the buffer 830 is arranged above the sewage temporary storage device 820 and is in communication through a vertical air pipeline 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, and the sewage can enter the air pipeline 831 only when the internal cavity is filled with sewage, 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 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.

[0096] Similarly, the air pump 810 is arranged above the buffer 830, and the suction pipeline 811 vertically extends to communicate the air pump 810 with the buffer chamber of the buffer 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.

[0097] In the embodiment, the top of the sewage temporary storage device 820 is provided with a gas permeable hole 821 for communicating the internal cavity of the sewage temporary storage device 820 with the external space. Especially for the aspect that the sewage is discharged into the recovery device 500 by gravity, after the air pump 810 is closed, the external air can enter the internal cavity of the sewage temporary storage device 820 through the gas permeable hole 821 to drive the sewage therein to flow into the recovery device 500.

[0098] In the above scheme, the opening area of the air vent 821 is small, and when the air pump 810 is in the open state, the rate of air entering the sewage temporary storage device 820 through the air vent 821 is limited, which does not significantly affect the formation of the 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 presence of the air vent 821, the inside of the sewage temporary storage device 820 can quickly recover to near atmospheric pressure. The sewage is pushed out by the entering air and enters the recovery device 500. By providing the air vent 821 on the sewage temporary storage device 820, the air pressure in the recovery device 500 is prevented from being too high, and after the air pump 810 stops working, the sewage cannot flow into the recovery device 500.

[0099] In this embodiment, the filter device 600 specifically comprises:

[0100] a filter cavity 610, on which a water inlet 6101, a filtered water outlet 6102, and a sewage outlet 6103 are arranged, and the water inlet 6101 and the filtered water outlet 6102 are connected to the circulating filter pipeline;

[0101] a filter mechanism 620, which is rotatably arranged in the filter cavity 610;

[0102] a driving mechanism 660, which drives the filter mechanism 620 to rotate in the filter cavity 610.

[0103] The filter mechanism 620 comprises a filter screen support and a filter screen covering the surface of the filter screen support, which separates 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 filter 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 filter impurities enters the inner cavity and flows out through the water outlet connector 621 connected to the inner cavity, and finally flows out of the filter cavity 610 through the filtered water outlet 6102. By designing the pore size of the filter screen, the filter mechanism 620 can not only filter large-size wire scraps in the water, but also filter microplastics in the water, thereby significantly reducing the content of microplastics in the washing machine drainage.

[0104] 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, to agitate the residual water in the filter cavity 610, so that the filter 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 are mixed into the water in the filter cavity 610. Finally, the sewage can be discharged from the sewage outlet 6103 into the sewage temporary storage device 820 by the action of the air pump 810 and finally be collected by the recovery device 500.

[0105] In the embodiment, the self-cleaning operation of the filter mechanism 620 driven by the driving mechanism 660 and / or the sewage discharge operation of the air pump 810 to discharge the sewage from the filter device 600 is performed at least once during one complete washing program of the washing machine. When the sewage discharge operation is performed, the filter mechanism 620 can be kept in a stationary state or be driven to rotate by the driving mechanism 660.

[0106] Further, the cleaning particles 680 are arranged in the filter cavity 610 of the filter device 600 to rub against and clean the inner wall of the filter cavity 610 and the outer wall of the filter mechanism 620. During the circulation filtering process, the cleaning particles 680 continuously rub against the inner wall of the filter cavity 610 and the outer wall of the filter mechanism 620 with the flowing water, so that the adhered filtering impurities are removed, thereby preventing the deposition of the filtering impurities and avoiding the covering of the filter mechanism 620 by the filtering impurities to affect the filtering efficiency. When the filter mechanism 620 rotates for self-cleaning, the cleaning particles 680 move in the filter cavity 610 under the action of the turbulent water flow, rub against the inner wall of the filter cavity 610 and the outer wall of the filter mechanism 620, thereby improving the stripping efficiency of the filtering impurities and achieving better self-cleaning effect of the filter device 600.

[0107] The baffle 690 is arranged in the filter cavity 610 to divide the filter cavity 610 into a first space on the left and a second space on the right, and the cleaning particles 680 and the main body of the filter mechanism 620 are located in the first space. The water inlet 6101 is in communication with the first space, and the filtered water outlet 6102 and the sewage outlet 6103 are in communication with the second space. The baffle 690 is provided with a water passing hole in communication with the first space and the second space, so that the sewage in the filter cavity 610 can be discharged from the sewage outlet 6103 through the baffle 690, and the cleaning particles 680 cannot pass through the water passing hole and are thus blocked by the baffle 690 on the left side, thereby avoiding the cleaning particles 680 from being discharged with the sewage through the sewage outlet 6103 or being accumulated at the sewage outlet 6103 to cause blockage.

[0108] The circulation filtering pipeline of the washing machine in the embodiment specifically includes:

[0109] The water tank drain pipe 260 is connected to the water inlet end of the circulating pump 400.

[0110] The drain pipeline 210 is connected to the water outlet end of the circulating pump 400 at one end and connected to the switching device 270 at the other end.

[0111] The circulation pipeline 220 is connected to the switching device 270 at one end and connected to the water inlet 6101 of the filter device 600 at the other end.

[0112] The backwater pipeline 230 is connected to the filtered water outlet 6102 of the filter device 600 at one end and in communication with the water tank 100 at the other end to deliver the filtered water into the water tank 100.

[0113] The switching device 270 is further connected to an external drainage pipeline 250 for draining water outside the washing machine, and the switching device 270 can control the circulation pipeline 220 and the external drainage pipeline 250 to be selectively connected to the drainage pipeline 210. In this way, the circulation filtration and drainage of the washing machine can be driven by one circulation pump 400, and the corresponding functions can be realized by controlling the conduction direction of the switching device 270.

[0114] The water outlet end of the backwater pipeline 230 is connected to the window gasket 110 at the opening of the tub 100, and the filtered water from the window gasket 110 enters the tub 100.

[0115] In the washing machine of the embodiment, the sewage carrying the filter impurities discharged from the filter device 600 is collected by the recovery device 500, and is filtered at the same time to separate the filter impurities from the water, thereby avoiding the problem that the sewage carrying the filter impurities is directly discharged from the washing machine, and the microplastics in the filter impurities enter the ecological cycle and affect the ecological environment and human health. The filter impurities are separated from the water by the recovery device 500, which is more convenient for the user to clean, and the filtered clean water is re-introduced into the tub 100 through the water inlet box 300, can be discharged through the tub 100, or can be used for subsequent washing process, which is beneficial to save the water consumption of the washing machine, and can also minimize the size of the recovery device 500 without causing water overflow.

[0116] The recovery device 500 is arranged inside the water inlet box 300, fully utilizes the internal space of the water inlet box 300, and eliminates the pipeline structure connecting the recovery device 500 and the water inlet box 300, so that the internal structure of the washing machine is more compact, the installation space is reduced, and the miniaturization design of the washing machine is facilitated.

[0117] The air pump 810 is arranged in the washing machine, and air is sucked between the filter device 600 and the recovery device 500 to form a negative pressure environment outside the sewage outlet 6103, so that the sewage in the filter device 600 is driven to be discharged from the sewage outlet 6103 and enter the recovery device 500 through the pressure difference. 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. Compared with the traditional water pump conveying mode, the trouble of pump body blockage is avoided.

[0118] Embodiment two

[0119] The difference between the embodiment and the above-mentioned embodiment one is that the water outlet of the recovery device is connected to the water inlet box through a pipeline, and the filtered water in the recovery device is discharged from the water outlet and enters the water inlet box through the pipeline.

[0120] In this embodiment, the recycling device and the water inlet box are each independently installed inside the washing machine's cabinet and connected by a pipeline. The clean water discharged from the outlet of the recycling device is sent into the water inlet box, and then into the water tank through the water inlet pipe connecting the water inlet box and the water tank.

[0121] Similar to Embodiment 1 above, in this embodiment, the housing of the recycling device is insertable / removable inside the washing machine's casing, making it convenient for the user to remove the housing from the washing machine casing and clean the collected filter impurities.

[0122] The solution in this embodiment can also achieve the purpose of returning water from the recycling device to the water tank through the water inlet box. Compared with the first embodiment, although the recycling device needs to occupy a certain space inside the washing machine, it does not require major modifications to the existing water inlet box structure. Only an opening connected to the recycling device needs to be added, and the modification cost is small.

[0123] Example 3

[0124] like Figures 3 to 7 As shown, this embodiment is a further limitation of the first embodiment above, wherein the wastewater inlet 550 of the recycling device 500 is provided with a unidirectional blocking member 540 that flows from the outside to the inside.

[0125] When the air pump 810 is turned on, the sealing component 540 can block the sewage inlet 550 of the recovery device 500, preventing air from being drawn out of the sewage inlet 550 within the recovery device 500, thus creating a relatively independent space between the sewage outlet 6103 and the recovery device 500. This allows a negative pressure environment to be quickly created inside the sewage storage device 820 under the suction of the air pump 810, improving sewage discharge efficiency. When the air pump 810 is turned off, the suction disappears, and the sewage flows out of the sewage storage device 820 due to gravity or the increased air pressure generated by air entering the sewage storage device 820. Under water pressure, the sealing component 540 can open the sewage inlet 550, allowing the sewage to enter the recovery device 500 for collection.

[0126] Specifically, the sealing component 540 includes:

[0127] The substrate 541 is installed on the sewage inlet 550 of the recycling device 500;

[0128] The opening part 542 is movable relative to the base 541, opening / closing the space outside and inside the recycling device 500.

[0129] Further, the sewage inlet 550 is arranged on the shell 510 of the recovery device 500, and the outer periphery of the sewage inlet 550 extends from the inner wall of the shell 510 of the recovery device 500 to the inside of the recovery device 500 to form a tubular portion 551. The base body 541 is mounted at the extended end of the tubular portion 551, and the opening portion 542 is movably arranged opposite to the extended end of the tubular portion 551 to open / close the opening of the extended end of the tubular portion 551.

[0130] In detail, the base body 541 is sleeved on the extended end of the tubular portion 551, and the opening portion 542 covers the opening of the tubular portion 551 from the outside of the tubular portion 551 to achieve the closing, and the opening portion 542 is flipped away from the tubular portion 551 to open the opening. The structure of the closing member 540 is simple, and the opening portion 542 abuts against the right end surface of the tubular portion 551 and cannot be flipped to the inside of the tubular portion 551, so that the sewage inlet 550 is unidirectionally communicated from the outside to the inside.

[0131] In one scheme of the embodiment, the opening portion 542 is made of flexible material capable of elastic deformation, such as rubber. When the air pump 810 is opened, the part of the opening portion 542 covering the opening deforms to protrude into the inside of the tubular portion 551 to achieve the closing of the opening. The opening portion 542 can be wrapped around the included angle between the inner wall of the tubular portion 551 and the right end surface of the tubular portion 551 to a certain extent, so as to increase the contact area of the opening portion 542 and the opening of the tubular portion 551. At the same time, the surface of the opening portion 542 facing the tubular portion 551 is formed as a convex surface, and the surface area is increased, that is, the force receiving area of the opening portion 542 subjected to the negative pressure adsorption force is increased, so that the closing member 540 can better seal the sewage inlet 550, and the rapid formation of the negative pressure environment is facilitated.

[0132] Further, the opening portion 542 and the base body 541 are integrally formed, that is, the closing member 540 is entirely made of flexible material, and the base body 541 and the opening portion 542 do not need additional connecting structure, so that the opening portion 542 and the base body 541 can be movably arranged, and the opening portion 542 can open / close the opening of the right end of the tubular portion 551.

[0133] In another scheme of the embodiment, the opening portion of the closing member is made of hard material, and the surface of the opening portion facing the opening of the tubular portion is a convex surface protruding into the inside of the tubular portion. Specifically, the opening of the tubular portion is circular, the opening portion is in a circular sheet structure, and the surface of the opening portion facing the opening of the tubular portion is an arc surface protruding in the middle.

[0134] When the opening portion blocks the opening of the tubular section, its curved surface allows it to partially extend into the opening. Furthermore, the surface of the opening portion that contacts the opening of the tubular section is inclined relative to the end face of the tubular section, resulting in a more secure seal and a better sealing effect. Simultaneously, the curved structure of the opening portion increases the surface area, which in turn increases the area subjected to the suction force of the air pump, further enhancing the sealing performance and thus better creating a negative pressure environment between the drain port of the filter device and the recovery device.

[0135] Furthermore, the opening portion of the sealing component is separately provided from the base, and the two are connected in a relatively movable manner. Specifically, the opening portion and the base are rotatably connected, and the opening portion opens / closes the tubular opening through a flipping motion.

[0136] Alternatively, the opening and the base can be integrally molded from plastic, where both the opening and the base are rigid and will not undergo significant deformation. The opening and the base are connected by a thin connecting piece, which is thin enough to deform under relatively small forces, allowing relative movement between the opening and the base.

[0137] In a further embodiment, the outer periphery of the sewage inlet 550 extends a certain length from the outer wall of the housing 510 of the recycling device 500 to the outside of the recycling device 500 to form a connecting part 552. The connecting part 552 is used to connect to a pipeline and to the sewage temporary storage device 820 through the pipeline. The end of the pipeline can be sleeved on the connecting part 552, making installation more convenient.

[0138] In this embodiment, a unidirectional sealing element 540 is provided at the sewage inlet 550 of the recycling device 500. This sealing element 540 can seal the sewage inlet 550 of the recycling device 500 when the air pump 810 draws air, thereby creating a negative pressure environment more quickly and increasing the pressure difference that can be formed at the discharge port 6103, thus improving the efficiency of the filtration device 600 in discharging sewage. After the air pump 810 is turned off, the sealing element 540 can automatically open the sewage inlet 550 under the impact of water flow, allowing sewage to smoothly enter the recycling device 500 for collection.

[0139] Example 4

[0140] like Figures 8 to 11 As shown, this embodiment is a further limitation of the above embodiment one or three. The washing machine also includes an isolation mechanism disposed between the sewage storage device 820 and the air pump 810. The isolation mechanism can gradually disconnect the connection between the air pump 810 and the sewage storage device 820 as the sewage is discharged, further preventing the sewage storage device 820 from overflowing.

[0141] In the specific scheme of the embodiment, the isolation mechanism comprises a floating member, and a vent hole 832 is arranged on a communication path between the air pump 810 and the sewage temporary storage device 820. During the sewage discharge process, the floating member rises with the water surface to block the vent hole 832 below the vent hole 832.

[0142] 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 vent hole 832.

[0143] In a further scheme of the embodiment, the floating ball 822 is arranged inside the sewage temporary storage device 820, and the vent hole 832 is formed at the connection between the vent pipe 831 and 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 vent hole 832, and the guide portion 823 has a hollow channel, and the floating ball 822 is arranged in the hollow channel.

[0144] As shown in Figure 8 and Figure 9 , 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 sewage discharge into the sewage temporary storage device 820, the water surface in the sewage temporary storage device 820 gradually rises. The side wall of the guide portion 823 is provided with a through hole for communicating the hollow channel with the space outside the guide portion 823, the water surface inside the guide portion 823 rises synchronously, and the floating ball 822 always floats on the water surface and gradually rises as the water surface rises. As shown in Figure 10 and Figure 11 , when the sewage temporary storage device 820 is full of water, the floating ball 822 rises with the water surface to the top of the sewage temporary storage device 820, and blocks the vent hole 832 from below, so that the sewage cannot overflow further upward through the vent hole 832, and it is ensured that the sewage will not overflow from the sewage temporary storage device 820.

[0145] In the above scheme, the floating ball 822 arranged in the sewage temporary storage device 820 is used to block the vent hole 832, which can block the vent hole 832 when the sewage temporary storage device 820 reaches the full water state, so that the filter device 600 can discharge a larger amount of sewage at one time, and the efficiency of sewage discharge is improved. By arranging the guide portion 823 to guide the movement of the floating ball 822, the floating ball 822 can only move reciprocatingly inside the guide portion 823, and the situation that the floating ball 822 cannot block the vent hole 832 due to deviation of the movement track is avoided.

[0146] In the embodiment, the guide portion 823 is in a circular tube structure, and the inner diameter of the guide portion 823 is greater than the outer diameter of the floating ball 822. A gap is formed between the floating ball 822 and the guide portion 823, which reduces or even eliminates the frictional resistance when the floating ball 822 reciprocates 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 surface.

[0147] In the preferred scheme of the embodiment, 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 surface rises.

[0148] In the embodiment, by arranging the floating ball 822 and the guide portion 823 in the sewage temporary storage device 820, the floating ball 822 can block the air vent 832 above when the sewage fills the sewage temporary storage device 820, preventing the sewage from overflowing from the air vent 832, and further avoiding the problem of the sewage temporary storage device 820 overflowing.

[0149] Embodiment Five

[0150] The difference between the embodiment and the above-mentioned embodiment four is that the isolation mechanism composed of the floating ball and the guide portion is arranged inside the buffer portion.

[0151] Specifically, the air vent is formed at the connection between the suction pipeline and the buffer portion. The guide portion vertically extends from the bottom to the air vent in the buffer portion, the side wall of the guide portion has a through hole, and the floating ball is arranged inside the guide portion.

[0152] In the embodiment, the volume of the sewage temporary storage device is greater than the volume of the filter device. In the normal operation of the washing machine, the sewage generally does not completely fill the sewage temporary storage device. However, in some abnormal situations, for example, there is sewage that has not been completely discharged in the previous time in the sewage temporary storage device, the sewage temporary storage device may overflow. At this time, the overflowing sewage enters the buffer portion along the air vent pipeline and gradually accumulates in the buffer cavity of the buffer portion, without being directly sucked into the air pump.

[0153] In the process of the sewage entering the buffer portion, the water surface in the buffer portion gradually rises, and the floating ball gradually rises in the guide portion as the water surface rises, and approaches the air vent at the top end. When the buffer portion is also filled with sewage, the floating ball rises to the uppermost end of the guide portion, which can block the air vent at the lower end of the suction pipeline, avoiding the situation that the sewage overflowing from the buffer portion is sucked into the air pump.

[0154] Embodiment Six

[0155] As Figure 12As shown, the difference between this embodiment and the above embodiment four is that: both the sewage temporary storage device 820 and the buffer part 830 are provided with an isolation mechanism composed of a float 822 and a guide part 823, and the top wall of the sewage temporary storage device 820 and the top wall of the buffer part 830 are respectively provided with vent holes 832 that can be blocked by the corresponding float 822.

[0156] Specifically, the lower end of the vent pipe 831 is connected to the top wall of the sewage storage device 820, forming a vent hole 832. The lower end of the suction pipe 811 is connected to the top wall of the buffer section 830, forming another vent hole 832.

[0157] Under normal circumstances, when the filter device 600 discharges sewage, the float 822 in the sewage storage device 820 rises with the water level until it reaches the top of the sewage storage device 820, where it blocks the vent 832, preventing sewage from overflowing from the sewage storage device 820. However, if the float 822 in the sewage storage device 820 becomes accidentally stuck and cannot move, the vent pipe 831 will remain connected to the sewage storage device 820. If the sewage storage device 820 overflows, the overflowing sewage will flow upwards along the vent pipe 831 into the buffer section 830.

[0158] In this embodiment, a float 822 is also provided inside the buffer section 830. If sewage continues to enter the buffer section 830, the float 822 inside the buffer section 830 will gradually rise with the water level. When the buffer section 830 is also filled with sewage, the float 822 can block the vent 832 on the top wall of the buffer section 830, that is, seal off the lower end of the suction pipe 811, so that sewage cannot overflow from the buffer section 830 into the air pump 810.

[0159] In this embodiment, floats 822 are provided in both the sewage storage device 820 and the buffer section 830, providing dual protection. Even if the float 822 in the sewage storage device 820 fails and causes sewage to overflow, the float 822 in the buffer section 830 can still prevent sewage from further overflowing into the air pump 810 by blocking the vent 832 at the lower end of the suction pipe 811 when the buffer section 830 is full of sewage, making it safer and more reliable.

[0160] Example 7

[0161] like Figure 2 and Figure 3 As shown, this embodiment provides a control method for the washing machine described in Embodiment 1, which controls the air pump 810 to perform suction actions multiple times when the filter device 600 needs to discharge sewage, thereby completing the discharge of sewage from the filter device 600 in multiple stages.

[0162] In one solution of the embodiment, the washing machine controls the sewage in the filter device 600 to be discharged in multiple times according to the sewage amount discharged by the air pump 810 each time of performing the suction action.

[0163] Specifically, the water level detection device is arranged on the sewage temporary storage device 820 to detect the water level inside the sewage temporary storage device 820. The control method of the washing machine comprises:

[0164] A1, controlling the air pump 810 to perform the suction action;

[0165] A2, the water level in the sewage temporary storage device 820 rises to the first set water level, and the air pump 810 is closed;

[0166] A3, the water level in the sewage temporary storage device 820 falls to the second set water level, and returns to step A1.

[0167] Further, according to the maximum sewage amount in the filter device 600 and the difference between the first set water level and the second set water level, the washing machine is provided with a preset number N1 of times of performing the suction action by the air pump 810, when the number of times of performing step A1 reaches N1, the washing machine does not perform step A3 after the completion of step A2, and ends the sewage discharge process of the filter device 600.

[0168] In another solution of the embodiment, the washing machine controls the sewage in the filter device 600 to be discharged in multiple times according to the duration of performing the suction action by the air pump 810 each time.

[0169] Specifically, the control method of the washing machine comprises:

[0170] B1, controlling the air pump 810 to perform the suction action;

[0171] B2, the duration of performing the suction action by the air pump 810 reaches the first preset duration t1, and the air pump 810 is closed;

[0172] B3, the air pump 810 is closed for the second preset duration t2, and returns to step S21.

[0173] Further, according to the maximum sewage amount in the filter device 600 and the sewage amount that can be discharged by performing the suction action for the first preset duration t1, the washing machine is provided with a preset number N2 of times of performing the suction action by the air pump 810, when the number of times of performing step S21 reaches N2, the washing machine does not perform step S23 after the completion of step S22, and ends the sewage discharge process of the filter device 600.

[0174] Through the above two schemes, the washing machine can control the amount of sewage discharged by the filtering device 600 when the air pump 810 performs a suction action once, ensure that the amount of sewage does not exceed the maximum volume of the sewage temporary storage device 820, and perform the next suction action after the sewage received in the sewage temporary storage device 820 is discharged into the recovery device 500 after the execution of the suction action is completed. In this way, it is ensured that the sewage temporary storage device 820 will not overflow during the process of discharging sewage from the filtering device 600, and the situation of sewage overflowing from the sewage temporary storage device 820 and being sucked into the air pump 810 is avoided.

[0175] In the embodiment, the volume of the sewage temporary storage device 820 can be smaller than the volume of the filtering device 600. By controlling the amount of sewage discharged when the air pump 810 performs a suction action once, the sewage temporary storage device 820 can be prevented from overflowing, and the overall volume of the sewage temporary storage device 820 can be reduced, which is beneficial to saving the installation space inside the washing machine.

[0176] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned 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; a filtering device in communication with the water tub, receiving water in the water tub for filtering, and having a sewage outlet for discharging sewage water outward; characterized in that it further comprises: a suction device performing a suction action to suck out the sewage water in the filtering device through the sewage outlet; a recovery device collecting and filtering the sewage water sucked out by the suction device, and the filtered water being introduced into the water tub; the sewage outlet of the filtering device being in communication with a sewage temporary storage device having an internal cavity, the sewage temporary storage device being in communication with the recovery device, the suction device being in communication with the internal cavity of the sewage temporary storage device and sucking air in the internal cavity of the sewage temporary storage device; a buffer portion being provided between the suction device and the sewage temporary storage device, the buffer portion having a buffer cavity inside, the buffer cavity being in communication with the internal cavity of the sewage temporary storage device and the suction device respectively.

2. A laundry washing machine according to Claim 1, characterized in that The washing machine further comprises a detergent feeding device in communication with the water tub, for feeding detergent into the water tub; the recovery device is in communication with the detergent feeding device, and the filtered water in the recovery device is introduced into the water tub through the detergent feeding device.

3. A laundry washing machine according to Claim 2, characterized in that The detergent feeding device comprises a water inlet box in communication with the water tub; the recovery device comprises a housing and a filtering assembly provided inside the housing, the filtering assembly being used for filtering the collected sewage water; the housing is provided with a water outlet for discharging the filtered water, and the water outlet is in communication with the water inlet box.

4. A laundry washing machine according to Claim 3, characterized in that The housing has a recovery cavity inside, the filtering assembly divides the recovery cavity into a first cavity and a second cavity, and the water outlet of the housing is in communication with the second cavity; the sewage water carrying filtering impurities enters the first cavity and enters the second cavity after being filtered by the filtering assembly, and the filtering impurities are collected in the first cavity.

5. A laundry washing machine according to Claim 4, characterized in that The first cavity is arranged above the second cavity.

6. A laundry washing machine according to Claim 4, characterized in that The housing of the recovery device is arranged inside the water inlet box, and the filtered water in the recovery device flows out of the water outlet and directly into the water inlet box.

7. A laundry washing machine according to Claim 6, characterized in that The housing is inserted or extracted inside the water inlet box.

8. A laundry washing machine according to Claim 7, characterized in that The filtering assembly is detachably mounted inside the housing.

9. A laundry washing machine according to Claim 4, characterized in that The water outlet and the water inlet box are in communication through a pipeline, the filtered water in the recovery device is discharged from the water outlet and enters the water inlet box through the pipeline.

10. A laundry washing machine according to Claim 9, characterized in that The housing is inserted or extracted inside the cabinet of the washing machine.

11. A laundry washing machine according to Claim 10, characterized in that The filtering assembly is detachably mounted inside the housing.

12. A laundry washing machine according to any one of claims 3 to 11, characterized in that, The water inlet box is connected to a water inlet pipe, and the water inlet pipe is in communication with the water tub.

13. A laundry washing machine according to Claim 12, characterized in that The water outlet end of the water inlet pipe is connected to the water tub, and the water inlet pipe comprises a corrugated pipe having a certain length.

14. A laundry washing machine according to any one of the preceding claims 1-11, characterized in that, An openable or closable sewage control valve is provided between the filtering device and the sewage temporary storage device.

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