CN115613304A

CN115613304A - Washing machine and control method thereof

Info

Publication number: CN115613304A
Application number: CN202110789621.2A
Authority: CN
Inventors: 许升; 吕艳芬; 刘凯
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2023-01-17

Abstract

The invention belongs to the technical field of washing machines, and discloses a washing machine and a control method thereof, wherein the washing machine comprises: the water containing cylinder is provided with a water inlet communicated with the water containing cylinder, receives water in the water containing cylinder for filtration, and is also provided with a sewage discharge port for discharging filtered impurities outwards; the water inlet end of the water return pipeline is communicated with the filtering device, the water outlet end of the water return pipeline is communicated with the water containing barrel, and the water filtered in the filtering device is sent into the water containing barrel; and the recovery device is communicated with the sewage discharge port of the filtering device and is used for collecting filtering impurities discharged by the filtering device. In the washing machine, water in the water containing barrel can be conveyed to the filtering device for filtering, then the water returns to the water containing barrel through the water return pipeline, and the water in the water containing barrel is driven to continuously circulate through the filtering device in the washing and rinsing processes, so that the thread scrap content in the water can be reduced, and the washing effect is improved.

Description

Washing machine and control method thereof

Technical Field

The invention belongs to the technical field of washing machines, and particularly relates to a washing machine and a control method thereof.

Background

In the process of washing the clothes by the washing machine, the clothes generate thread scraps to fall off and mix into the washing water due to friction between the clothes and friction between the clothes and the washing machine. If the lint in the washing water cannot be removed, the lint is likely to adhere to the surface of the laundry after the washing is completed, which may affect the washing effect of the laundry. For this reason, the conventional washing machine is provided with a filter for filtering lint, and washing water is circulated through the filter to remove lint from the washing water during washing.

The filter of the existing washing machine is generally arranged in the inner tub or the drainage pump for filtering thread scraps and impurities in the washing water. However, after the washing machine is used for a long time, the filter is filled with the thread scraps and the sundries, the filtering effect of the filter is affected, the blocking of a drain valve/a drain pump is caused, bacteria are easy to breed, the filter needs to be cleaned in time, otherwise, the washing water is polluted, the secondary pollution is caused to clothes, and the health of a user is affected. However, most washing machines require the user to remove the filter for manual cleaning, and are inconvenient to operate.

On the other hand, in the partial filter, due to consideration of blockage of the filter holes on the filter by the lint, the pore size of the filter holes is usually set to be larger, but fine lint on some clothes cannot be filtered due to the blockage, so that the lint is adhered to the clothes, and the user experience is influenced. Meanwhile, part of the thread scraps can be discharged along with water flow and enter ecological cycle, and the health of a human body is finally influenced.

Because of the above problems, the prior art proposes a filter capable of self-cleaning, which is capable of removing thread scraps and the like in the filter by washing or vibrating, and then collecting the thread scraps and the like into a drain pipe of a washing machine along with washing water to be discharged out of the washing machine. However, in the scheme, the washed thread scraps are directly gathered into the drainage water flow of the washing machine and still enter into ecological circulation, thus posing a threat to human health.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a washing machine and a control method thereof, wherein a filtering device is arranged in the washing machine, water in a water containing barrel can be conveyed to the filtering device for filtering and then returns to the water containing barrel through a water return pipeline, and in the washing and rinsing processes, the water in the water containing barrel is driven to continuously circulate through the filtering device, so that the thread scrap content in the water can be reduced, the washing effect is improved, meanwhile, the filtered filtering impurities can be discharged into a recycling device for collection, and cannot be directly discharged along with the drainage of the washing machine, and the possibility that fine thread scraps enter ecological circulation along with the water flow is reduced.

In order to solve the technical problems, the invention adopts the technical scheme that:

a washing machine, comprising:

a water-containing cylinder is arranged in the water tank,

the filtering device is provided with a water inlet communicated with the water containing barrel, receives water in the water containing barrel for filtering, and is also provided with a sewage discharge port for discharging filtered impurities outwards;

the water inlet end of the water return pipeline is communicated with the filtering device, the water outlet end of the water return pipeline is communicated with the water containing barrel, and the water filtered in the filtering device is sent into the water containing barrel;

and the recovery device is communicated with the sewage discharge port of the filtering device and is used for collecting filtering impurities discharged by the filtering device.

Furthermore, a window pad is arranged at the opening of the water containing barrel, and filtered water conveyed in the water return pipeline enters the water containing barrel through the window pad.

Furthermore, a window pad water return port communicated with the water containing barrel is formed in the window pad, and the water outlet end of the water return pipeline is connected to the window pad water return port;

preferably, the window mat water return port is provided at a top region of the window mat.

Further, a sprayer assembly is installed on the window mat; the water outlet end of the water return pipeline is connected with the spray head component; or the water outlet end of the water return pipeline is connected to a spray pipeline which supplies water to the spray head component.

Furthermore, a water return port of the water containing barrel is arranged on the water containing barrel, and a water outlet end of the water return pipeline is connected with the water return port of the water containing barrel;

preferably, the water return port of the water containing barrel is arranged on the barrel wall of the water containing barrel.

Furthermore, a buffer element is arranged at the water outlet end of the water return pipeline, and the water return pipeline is connected with a water return port of the water containing barrel through the buffer element;

preferably, the buffer is a bellows having a certain length.

Furthermore, the washing machine further comprises a main water inlet pipeline connected with an external water source, and the water outlet end of the water return pipeline is communicated with the main water inlet pipeline.

Furthermore, a detergent box is arranged on the main water inlet pipeline, a water inlet of the detergent box is communicated with an external water source, and a water outlet of the detergent box is communicated with the water containing barrel;

the washing agent box is provided with a filtered water inlet, the water outlet end of the water return pipeline is connected with the filtered water inlet, and filtered water conveyed in the water return pipeline enters the water containing barrel through the washing agent box.

Furthermore, a sewage discharge port of the filtering device is communicated with the recovery device through a sewage discharge pipeline, and a sewage discharge control valve for controlling the on-off of the sewage discharge pipeline is arranged on the sewage discharge pipeline;

preferably, when the pollution discharge control valve is opened, the pollution discharge pipeline is communicated from the filtering device to the recovery device in a one-way mode.

Another object of the present invention is to provide the control method of the above washing machine, further comprising a circulation pump disposed on a pipeline connecting the water drum and the water inlet of the filtering device, or on the water return pipeline;

the control method comprises the following steps: and starting the circulating pump, conveying the water in the water containing barrel into the filtering device for filtering, and returning the filtered water to the water containing barrel through the water return pipeline.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

In the invention, the water containing barrel of the washing machine is communicated with the water inlet of the filtering device, water to be filtered is introduced into the filtering device, the filtered water returns to the water containing barrel through the water return pipeline, and the water in the water containing barrel is driven to continuously circulate through the filtering device for filtering in the washing and rinsing processes, so that the thread scrap content in the water can be reduced, and the washing effect is improved. Meanwhile, filtering impurities such as thread scraps filtered by the filtering device are discharged into the recovery device to be collected, and are not directly discharged along with the drainage of the washing machine, so that the condition that fine thread scraps are mixed into ecological circulation to harm the ecological environment and human health is avoided.

According to the invention, the water return pipeline connected to the filtering device returns water to the water containing barrel through the window pad at the barrel opening of the water containing barrel, so that the window pad can be flushed while the water returns, and the cleanness of the window pad is ensured. When the return water pipeline is connected to the spraying component or the spraying pipeline, the spraying effect on the internal clothes can be realized while returning water, spraying water does not need to enter from the outside of the washing machine independently, and the water consumption in the washing process is saved.

In the invention, the water outlet end of the water return pipeline is directly connected to the water containing barrel, so that the extension length of the water return pipeline can be reduced, and the space is saved. The water outlet end of the water return pipeline is provided with the buffer piece, so that a certain buffer effect can be achieved on the vibration of the water containing barrel in the operation process of the washing machine, and the water leakage caused by the looseness of connection between the water return pipeline and the water return port of the water containing barrel due to the vibration of the water containing barrel can be prevented.

According to the invention, the water return pipeline is connected to the detergent box, and filtered water enters the water containing barrel through the detergent box, so that the detergent box can be further flushed, and the condition that the detergent is not completely dissolved is avoided.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic structural view of a washing machine in an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the invention at A in FIG. 1;

FIG. 3 is a schematic view of a window gasket according to an embodiment of the present invention;

FIG. 4 is a schematic view of a washing machine according to a second embodiment of the present invention;

FIG. 5 is a schematic view showing a structure of a washing machine according to a third embodiment of the present invention;

FIG. 6 is a schematic structural view of a filter device according to a fourth embodiment of the present invention;

FIG. 7 is a schematic view of section B-B of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic view illustrating a washing machine performing a self-cleaning operation according to a fifth embodiment of the present invention;

FIG. 9 is a schematic view illustrating a fifth embodiment of a drain operation of the washing machine according to the present invention;

FIG. 10 is an enlarged schematic view of the invention at C of FIG. 9;

fig. 11 is a schematic structural view of a washing machine according to a sixth embodiment of the present invention.

In the figure: 10. a box body; 100. a water containing cylinder; 101. a water return port of the water containing barrel; 110. a window pad; 111. a window pad water return port; 112. a showerhead assembly; 113. a down lamp; 114. an inlet of a drying air duct; 210. a drain line; 220. a circulation line; 230. a water return pipeline; 231. a return water control valve; 240. a sewage draining pipeline; 241. a blowdown control valve; 250. an outer discharge pipeline; 260. a drain pipe of the water containing barrel; 270. a switching device; 300. a detergent box; 301. a filtered water inlet; 310. a second water inlet pipe; 400. a circulation pump; 500. a recovery device; 501. filtering impurities; 510. a housing; 520. a filter assembly; 531. a first chamber; 532. a second chamber;

600. a filtration device; 601. a first limiting surface; 602. a second limiting surface; 603. a third limiting surface; 604. a fourth limiting surface; 605. a fifth limiting surface; 606. a sixth limiting surface; 610. a filtering cavity; 6101. a water inlet; 6102. a filtered water outlet; 6103. a sewage draining outlet; 6104. an installation port; 611. a seal support portion; 612. a sleeve portion; 613. reinforcing ribs; 620. a filtering mechanism; 621. a water outlet joint; 622. a rotation support; 623. a filter screen support part; 624. a motor mounting portion; 625. a filter screen; 631. a first bearing; 632. a second bearing; 641. a first seal member; 642. a second seal member; 643. a third seal member; 650. a filter cavity flange; 651. a connecting portion; 652. a plug-in part; 653. a through opening; 660. a drive mechanism.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Example one

As shown in fig. 1 to 3, the washing machine according to the present embodiment includes:

the water containing cylinder (100) is provided with a water inlet,

a filter device 600 having a water inlet 6101 communicated with the water containing cylinder 100, receiving the water in the water containing cylinder 100 for filtration, and a drain 6103 for discharging the filtered impurities to the outside;

a water return pipe 230, the water inlet end of which is communicated with the filtering device 600 and the water outlet end of which is communicated with the water containing barrel 100, for feeding the filtered water into the water containing barrel 100;

the recycling device 500 is communicated with a sewage outlet 6103 of the filtering device 600, and is used for collecting the filtered impurities discharged from the filtering device 600.

In the above scheme, the water containing cylinder 100 is communicated with the water inlet 6101 of the filter device 600 through a pipeline, and the filter device 600 is communicated with the water containing cylinder 100 through the water return pipeline 230, so that a circulating filter pipeline is formed outside the water containing cylinder 100. The water in the water container 100 flows along the circulation filtering line and is filtered by the filtering device 600, thereby reducing the thread scrap content in the water container 100.

Specifically, the circulating pump 400 is disposed on a pipeline connecting the water containing cylinder 100 and the water inlet 6101 of the filtering device 600, when the circulating pump 400 is turned on, the water to be filtered in the water containing cylinder 100 can be introduced into the filtering device 600 through the pipeline, filtered by the filtering device 600 to remove impurities such as thread scraps therein, and then returned to the water containing cylinder 100 through the water return pipeline 230. In the washing and rinsing processes of the washing machine, the water drum 100 is continuously driven to circularly flow through the filtering device 600, so that the thread scrap content in water can be reduced, and the washing effect is improved.

It can be understood that the circulating pump can also be arranged on the water return pipeline, and the same effect can be achieved.

In this embodiment, the filter device 600 includes:

a filtering cavity 610, on which a water inlet 6101, a filtered water outlet 6102 and a sewage outlet 6103 are arranged;

and the filtering mechanism 620 is arranged inside the filtering cavity 610, divides the inside of the filtering cavity 610 into an inner containing cavity and an outer containing cavity, and is provided with a water outlet connector 621 communicated with the filtered water outlet 6102.

The water to be filtered enters the outer cavity of the filtering cavity 610 through the water inlet 6101, enters the inner cavity after being filtered by the filtering mechanism 620, then flows out through the water outlet 621, is discharged out of the filtering device 600 through the filtered water outlet 6102, and the filtered impurities filtered from the water are attached to the outer surface of the filtering mechanism 620. The filtering apparatus 600 of this embodiment has a function of automatically cleaning the attached filtering impurities, and the filtering impurities peeled from the surface of the filtering mechanism 620 after cleaning can be discharged through the sewage outlet 6103. Collect exhaust filtration impurity through setting up recovery unit 500, rather than direct outside the discharge in the drainage rivers that let in washing machine with filtration impurity, can avoid filtering the slight thread crumbs in the impurity and directly get into ecological cycle along with drainage rivers, cause the influence to ecological environment and health.

In a further aspect of this embodiment, a window pad 110 is disposed at a mouth of the water container 100, and the filtered water conveyed in the water return pipe 230 enters the water container 100 through the window pad 110.

Specifically, the window pad 110 is provided with a window pad water return port 111 communicated with the water container 100, and a water outlet end of the water return pipeline 230 is connected to the window pad water return port 111.

Preferably, the window mat return opening 111 is provided at a top region of the window mat 110.

In the above solution, the water return pipe 230 is connected to the window mat water return port 111 of the window mat 110, and the filtered water flows out of the water return pipe 230 and then flows through the inner surface of the window mat 110 into the water containing barrel 100. Therefore, in the process of returning water to the water containing cylinder 100, the window pad 110 can be washed, dirt accumulation on the inner side of the window pad 110, particularly on the wrinkled part, can be avoided, and cleanness of the window pad 110 can be ensured.

In detail, as shown in fig. 3, the window mat 110 of the present embodiment is further provided with a spray head assembly 112, and the spray head assembly 112 may be connected to a spray line for supplying water to spray the laundry. The window pad 110 is further provided with a down lamp 113, and the down lamp 113 can illuminate the inner space when a user opens the door of the washing machine, so that the user can conveniently take and place clothes.

The washing machine in this embodiment also has a function of drying laundry, and a drying air duct communicated with the water containing drum 100 is provided inside the washing machine. Wherein, the inlet 114 of the drying air duct is also connected to the window pad 110, so as to achieve the purpose that the drying air duct introduces drying air into the water containing cylinder 100.

In another scheme of this embodiment, the window mat may not be provided with the window mat return water port alone, but the outlet end of the return water pipeline is directly connected with the spray head assembly on the window mat. Water in the water return pipeline returns to the water containing barrel in a spraying mode through the spray head assembly, and can realize spraying and washing of clothes while returning water, and independent water inlet spraying from the outside of the washing machine is not needed, so that water consumption in the washing process is saved.

In another scheme of this embodiment, a spray pipeline for supplying water to the nozzle assembly is connected to the spray assembly, and a water outlet end of the water return pipeline is connected to the spray pipeline. When water in the water containing barrel is subjected to circulating filtration, water in the water return pipeline can be introduced into the spraying pipeline, and then the clothes are sprayed through the spray head assembly. When the circulating pump does not work, namely when the water return pipeline does not contain circulating filtered water, water can be fed from the outside of the washing machine and supplied to the spray head component through the spray pipeline, so that the spray function is realized. No matter whether the washing machine carries out circulating filtration on the water in the water containing barrel or not, the realization of the spraying function is not influenced.

In this embodiment, the water return pipeline 230 for delivering filtered water into the water containing cylinder 100 is directly or indirectly connected to the window pad 110 at the cylinder opening of the water containing cylinder 100, so that the water can be returned while the inner side of the window pad 110 is washed, or the clothes can be sprayed and washed, thereby improving the user experience.

Example two

As shown in fig. 4, the present embodiment is different from the first embodiment in that: the water containing barrel 100 is provided with a water containing barrel water return port 101, and the water outlet end of the water return pipeline 230 is connected with the water containing barrel water return port 101.

In a preferred embodiment of the present invention, the water return port 101 is disposed on the wall of the water tank 100.

In this embodiment, the filtering device 600 is disposed above the water containing barrel 100, and is located in the middle region of the water containing barrel 100 in the axial direction of the water containing barrel 100, and the water containing barrel water return port 101 is disposed on the barrel wall of the water containing barrel 100, so that compared with a scheme of returning water through the window gasket 110, the distance between the filtered water outlet 6102 of the filtering device 600 and the water containing barrel water return port 101 is shortened, the setting length of the water return pipeline 230 can be reduced, and the water path structure is simplified.

In a further aspect of this embodiment, a buffer member (not shown in the drawings) is disposed at a water outlet end of the water return pipeline 230, and the water return pipeline 230 is connected to the water return port 101 of the water containing barrel through the buffer member.

Preferably, the buffer member is a corrugated tube having a certain length.

Because the water containing barrel 100 vibrates to a certain extent during the operation of the washing machine, in the above scheme, the water return pipeline 230 is connected with the water return port 101 of the water containing barrel through a buffer which can buffer the vibration of the water containing barrel 100 to a certain extent. For example, a corrugated pipe with a certain length is arranged at the water outlet end of the water return pipeline 230, and the corrugated pipe is connected to the water return port 101 of the water containing barrel, so that displacement generated by vibration of the water containing barrel 100 can be absorbed by the corrugated pipe, and the situation of water leakage caused by the loose connection structure between the water return pipeline 230 and the water return port 101 of the water containing barrel due to vibration of the water containing barrel 100 is avoided.

In this embodiment, the water receiving cylinder 100 is provided with the water receiving cylinder return port 101, the return pipe 230 is directly connected to the water receiving cylinder 100, the return path is shortened, and the return pipe 230 has a short length and a simple structure.

EXAMPLE III

As shown in fig. 5, the present embodiment is different from the first embodiment in that: the washing machine further includes a main water inlet pipeline connected to an external water source, and the water outlet end of the water return pipeline 230 is communicated with the main water inlet pipeline. The main water inlet pipeline is used for introducing external water into the water containing barrel 100.

Further, a detergent box 300 is arranged on the main water inlet pipeline, a water inlet of the detergent box 300 is communicated with an external water source, and a water outlet is communicated with the water containing barrel 100.

Specifically, the primary water inlet circuit includes:

a first water inlet pipe (not shown) having both ends connected to a water inlet valve of the washing machine and a water inlet of the detergent box 300;

and a second water inlet pipe 310 having both ends connected to the water outlet of the detergent box 300 and the water inlet of the water container 100, respectively.

The detergent box 300 is provided with a filtered water inlet 301, the water outlet end of the water return pipeline 230 is connected with the filtered water inlet 301, and the filtered water conveyed in the water return pipeline 230 enters the water containing barrel 100 through the detergent box 300.

In this embodiment, the water return pipe 230 is connected to the detergent box 300, and the filtered water firstly enters the detergent box 300 and then enters the water containing barrel 100 through the detergent box 300. The inside of the detergent box 300 can be further washed in the water return process, so that the condition that the detergent is not completely dissolved is avoided.

Example four

As shown in fig. 1, 7 and 8, this embodiment is further defined by the first to third embodiments, in the filter device 600, the filter mechanism 620 is rotatably installed inside the filter cavity 610, and the filter device 600 further includes a driving mechanism 660 connected to the filter mechanism 620 for driving the filter mechanism 620 to rotate in the filter cavity 610. The drive mechanism 660 may be a motor.

In this embodiment, when the filter device 600 needs to be cleaned, the driving mechanism 660 drives the filter mechanism 620 to rotate, and the filtered impurities attached to the surface of the filter mechanism 620 can fall off under the action of centrifugal force, so as to be discharged through the sewage outlet 6103. In the case of water stored in the filtering chamber 610, the rotation of the filtering mechanism 620 may also agitate the water in the filtering chamber 610, and the resulting agitated water flow may further act on the surface of the filtering mechanism 620 to assist in stripping off the filtering impurities.

Adnexed filtering impurity peels off from filtering mechanism 620 surface under centrifugal force and the dual function of surging rivers, has realized filter device 600's automatic clearance in this embodiment, need not the user and unloads filter device 600 and carry out manual clearance, and filtering impurity's clearance rate is high simultaneously, and the clearance is effectual.

Further, as shown in fig. 7 and 8, the outer circumference of the filtered water outlet 6102 on the filtering cavity 610 extends to the outside of the filtering cavity 610 to form a sealing support 611. The water outlet connector 621 is disposed at the left end of the filter mechanism 620, inserted into the sealing support portion 611, and rotatably and sealingly connected to the sealing support portion 611.

The filter device 600 further comprises:

a first bearing 631 sleeved on the water outlet joint 621;

the first sealing member 641 is disposed on one side of the first bearing 631 facing the inside of the filter chamber 610, and seals the gap between the water outlet 621 and the sealing support portion 611.

In detail, the filter mechanism 620 includes a filter screen holder and a filter screen 625, wherein the filter screen holder includes:

a filter screen support 623 located inside the filter cavity 610, wherein the filter screen 625 covers the surface of the filter screen support 623;

a water outlet joint 621 which is arranged at the left end of the filter screen supporting portion 623 and is rotatably inserted into the sealing supporting portion 611;

and a rotating support 622 arranged at the right end of the filter screen support 623 and rotatably connected with the filter chamber 610.

In the above scheme, the first bearing 631 is disposed between the water outlet connector 621 and the sealing support portion 611 to support the water outlet connector 621, so that the water outlet connector 621 can rotate more smoothly in the sealing support portion 611, and meanwhile, the structure is stable, and the stable rotation of the filtering mechanism 620 in the filtering cavity 610 can be ensured. The first sealing element 641 is arranged on the right side of the first bearing 631, so that the washing water in the filtering cavity 610 can not enter the gap between the water outlet joint 621 and the sealing support part 611, the first bearing 631 is prevented from contacting with the water, the failure of the first bearing 631 is avoided, and the effect of the first bearing 631 is ensured. Meanwhile, the first sealing member 641 also prevents the unfiltered washing water from flowing out of the filtered water outlet 6102 through the sealing support 611, which may affect the thread waste removing efficiency of the filter apparatus 600.

In a specific scheme of this embodiment, the first sealing element 641 is disposed on the water outlet 621 in a sleeved manner, an inner wall of the first sealing element 641 is connected to an outer wall of the water outlet 621 in a sealing manner, and an outer wall of the first sealing element 641 is connected to an inner wall of the sealing support portion 611 in a rotatable sealing manner.

In a further aspect of this embodiment, the filter device 600 further includes a second sealing element 642, where the second sealing element 642 is disposed on a side of the first bearing 631 facing away from the inside of the filter cavity 610, and blocks a gap between the water outlet 621 and the sealing support 611.

Specifically, the second sealing element 642 is sleeved on the water outlet connector 621, an inner wall of the second sealing element 642 is in sealing connection with an outer wall of the water outlet connector 621, and an outer wall of the second sealing element 642 is in rotatable sealing connection with an inner wall of the sealing support portion 611.

In the above solution, the left side of the first bearing 631 is further provided with a second sealing element 642, and water flowing out through the water outlet joint 621 can be blocked by the second sealing element 642 and does not contact the first bearing 631. First bearing 631 is located between first sealing member 641 and second sealing member 642, has guaranteed to the at utmost that first bearing 631's installation environment is anhydrous, has avoided first bearing 631 to meet the water and has rusted, influences the pivoted smoothness nature of filter mechanism 620.

In a further aspect of this embodiment, the inner wall of the sealing support portion 611 has a stepped structure, and a first limiting surface 601, a second limiting surface 602, and a third limiting surface 603, which have an annular structure and gradually decrease in inner diameter, are sequentially formed from one end of the sealing support portion 611 to the outside of the filtering cavity 610.

The surface of the first sealing member 641 facing the outside of the filter chamber 610 abuts against the first stopper surface 601, the surface of the first bearing 631 facing the outside of the filter chamber 610 abuts against the second stopper surface 602, and the surface of the second sealing member 642 facing the outside of the filter chamber 610 abuts against the third stopper surface 603.

In the above scheme, a plurality of vertical annular limiting surfaces are formed on the inner wall of the sealing support portion 611 of the stepped structure and are respectively abutted against the respective left side surfaces of the first sealing element 641, the first bearing 631 and the second sealing element 642, so that the movement of the three in the axial direction of the water outlet joint 621 can be limited, and the looseness of a matching structure between the water outlet joint 621 and the sealing support portion 611 in the rotation process of the filter mechanism 620 is prevented.

In a preferred embodiment of this embodiment, an outer diameter of one end of the water outlet joint 621 close to the outside of the filtering cavity 610 is smaller than an outer diameter of the other end, and a fourth limiting surface 604 having an annular structure and perpendicular to an axis of the water outlet joint 621 is formed on an outer wall of the water outlet joint 621. The surface of the first bearing 631 facing the inside of the filter chamber 610 abuts against the fourth limiting surface 604.

By setting the outer diameter of the left end of the water outlet joint 621 smaller than that of the right end, a fourth limiting surface 604 facing the left side is formed at the abrupt change position of the outer diameter and abuts against the right side surface of the first bearing 631. Therefore, the two sides of the first bearing 631 are both provided with the limiting structures, and the structure is more stable.

In this embodiment, one end of the sealing support portion 611 far away from the filtering cavity 610, that is, the left end of the sealing support portion 611 is connected to the filtering cavity flange 650, and the middle of the filtering cavity flange 650 is provided with a through hole 653 communicated with the water outlet connector 621. The outer periphery of the through-hole 653 extends away from the seal support 611 to form a connection portion 651.

Preferably, the surface of the filter cavity flange 650 facing the side of the sealing support 611 has a raised socket 652, and the socket 652 is inserted into the opening at the left end of the sealing support 611.

In the above solution, the left end of the sealing support portion 611 is connected to the filter flange 650, and a connection portion 651 is formed on the filter flange 650, wherein the outer diameter of the connection portion 651 is smaller than the outer diameter of the sealing support portion 611, and the inner diameter of the connection portion 651 is preferably equal to the inner diameter of the water outlet connector 621. When the filter device 600 is installed in the washing machine, it is connected to the pipe through the connection portion 651, so that the washing water without thread scraps after filtering can be discharged, and the installation is easier than a mode in which the pipe is directly connected to the left end of the sealing support portion 611.

The right side of filter cavity flange 650 has a plug portion 652 inserted into the left end opening of seal support 611 for positioning filter cavity flange 650 when assembled with seal support 611. The periphery of the filter cavity flange 650 and the periphery of the sealing support portion 611 are respectively provided with a plurality of fixing portions, and the fixing of the filter cavity flange 650 and the sealing support portion 611 is realized by passing screws through the fixing portions.

In a further aspect of this embodiment, a rotation axis of the rotation support 622 at the right end of the filter mechanism 620 extends toward the outside of the filter cavity 610, and the filter cavity 610 is provided with an installation opening 6104 for the rotation support 622 to pass through. The rotation support 622 is rotatably and hermetically connected to the mounting opening 6104.

In this embodiment, since the filtering mechanism 620 is driven by the driving mechanism to rotate, the driving mechanism is disposed outside the filtering chamber 610, and is prevented from contacting with the washing water. To this end, a rotation support 622 is protruded from the right end of the filter chamber 610, and a motor mounting portion 624 is provided at the right end of the rotation support 622 for connection with a driving mechanism, such as a motor.

Further, the outer circumference of the mounting opening 6104 extends along the axis of the rotation support 622 to the outside of the filtering cavity 610 to form a sleeve portion 612, and the rotation support 622 is sleeved with a third sealing member 643. An inner wall of the third seal 643 is sealingly connected to an outer wall of the rotation support 622, and an outer wall of the third seal 643 is sealingly connected to an inner wall of the sleeve portion 612.

A second bearing 632 is further disposed between the sleeve portion 612 and the rotation support portion 622, and the second bearing 632 is sleeved on the rotation support portion 622 and located at a side of the third sealing member 643 facing the outside of the filtering cavity 610.

In the above-described embodiment, the third seal 643 is provided to prevent water in the filtering chamber 610 from leaking out of the mounting opening 6104, and the second bearing 632 is provided to support the rotation support 622, so that the relative rotation between the rotation support 622 and the sleeve portion 612 can be more smoothly ensured. The second bearing 632 is disposed on the right side of the third seal 643 and does not contact water in the filter chamber 610, thereby preventing failure.

In a preferred embodiment of the present invention, the sleeve portion 612 has an inner diameter smaller at one end thereof adjacent to the outside of the filter chamber 610 than at the other end thereof, and a fifth stopper surface 605 having an annular structure and perpendicular to the axis of the rotation support 622 is formed on the inner wall of the sleeve portion 612. The surface of the third seal 643 facing the outside of the filter chamber 610 abuts against the fifth stopper surface 605.

The outer diameter of one end of the rotating support 622 close to the outside of the filtering cavity 610 is smaller than that of the other end, and a sixth limiting surface 606 having an annular structure and perpendicular to the axis of the rotating support 622 is formed on the outer wall of the rotating support 622. The surface of the second bearing 632 facing the inside of the filter chamber 610 abuts against the sixth stopper surface 606.

In the above configuration, the sleeve portion 612 has a smaller inner diameter at the right end than at the left end, and a fifth stopper surface 605 facing the left side is formed at a sudden change in the inner diameter thereof to abut against the right side surface of the third seal 643. The right end of the rotation support 622 has an outer diameter smaller than that of the left end, and a sixth stopper 606 facing the right side is formed at a sudden change of the outer diameter and abuts against the left side surface of the second bearing 632. The above structure restricts the movement of the third seal 643 and the second bearing 632 in the axial direction of the rotation support portion 622, and the structure is stable.

In this embodiment, the first sealing element 641, the second sealing element 642 and the third sealing element 643 are all oil seals, and the right wall of the filtering cavity 610 is separated from the peripheral side wall thereof. The filter mechanism 620, the first sealing element 641, the second sealing element 642 and the first bearing 631 at the left end thereof are integrally installed inside the filter chamber 610, the third sealing element 643 and the second bearing 632 are installed at the right end thereof, and finally the right wall of the filter chamber 610 is fastened with the peripheral side wall thereof.

In this embodiment, the cross-sectional area of the middle region of the filter screen support portion 623 is constant, and the left and right ends thereof have a tapered structure, so that the local surface of the filter screen 625 is inclined, which is beneficial to the falling off of the adhered lint.

In this embodiment, the water inlet 6101 and the drainage outlet 6103 on the filtering cavity 610 are oriented perpendicular to the axial direction of the filtering mechanism 620.

Preferably, the filtering cavity 610 has a cylindrical structure, the water inlet 6101 is disposed near the right end of the filtering cavity 610, the drain 6103 is disposed near the left end of the filtering cavity 610, and the positions of the water inlet 6101 and the drain 6103 are symmetrical in the circumferential direction of the filtering cavity 610.

In the above-described embodiment, the position of the water inlet 6101 is as far away from the water outlet connector 621 as possible, so that the area of the filter screen 625 can be fully utilized. The water inlet 6101 and the sewage outlet 6103 are arranged up and down, and staggered in the axial direction of the filtering cavity 610, which is beneficial to fully discharging the sewage after the filtering cavity 610 is cleaned with the filtering apparatus 600.

In a further aspect of this embodiment, the outer wall of the sealing support 611 is provided with a reinforcing rib 613 extending along the radial direction of the sealing support 611, and the reinforcing rib 613 is connected to the surface of the filtering cavity 610 where the filtered water outlet 6102 is located.

Since the seal support portion 611 protrudes from the left end surface of the filter chamber 610 by a certain length, the reinforcing rib 613 is provided to support the peripheral side wall thereof from the outside, and the strength of the seal support portion 611 is ensured.

In this embodiment, a rotatable filtering mechanism 620 is disposed in the filtering cavity 610 of the filtering device 600, and after the washing water to be filtered enters the filtering cavity 610, the water filtered to remove thread scraps enters the filtering mechanism 620 and flows out through the water outlet connector 621. The filterable thread scraps are attached to the outer surface of the filtering mechanism 620, and the filtering mechanism 620 is driven to rotate, so that the thread scraps can be separated, and water in the filtering cavity 610 is discharged through the sewage outlet 6103, so that the self-cleaning function of the filtering device 600 is realized, and the manual cleaning of a user is not needed.

The two ends of the filtering mechanism 620 are respectively provided with a first bearing 631 and a second bearing 632 for supporting, so as to ensure that the filtering mechanism 620 smoothly and stably rotates in the filtering cavity 610. Meanwhile, the first bearing 631 and the second bearing 632 are prevented from contacting water by the arrangement of the first seal 641, the second seal 642 and the third seal 643, and the failure of the first bearing 631 and the second bearing 632 is avoided.

EXAMPLE five

As shown in fig. 1 and fig. 2, this embodiment is a further limitation of the fourth embodiment, the sewage outlet 6103 of the filtering apparatus 600 is communicated with the recycling apparatus 500 through the sewage pipeline 240, and the sewage pipeline 240 is provided with a sewage control valve 241 for controlling the on-off of the sewage pipeline 240.

In the preferred embodiment, when the drain control valve 241 is opened, the drain line 240 is communicated from the filter device 600 to the recycling device 500 in one direction.

In the above scheme, the on-off of the sewage pipeline 240 is controlled by the sewage control valve 241, so that the water outlet direction of the filtering device 600 can be controlled. When the drain control valve 241 is used, water cannot flow through the drain pipe 240, so that water in the filtering chamber 610 cannot flow out of the drain outlet 6103, and at this time, the filtered water can be discharged into the water return pipe 230 through the filtered water outlet 6102.

When the blowdown control valve 241 is opened, the blowdown pipeline 240 is conducted, and the sewage in the filtering cavity 610 can flow out of the blowdown port 6103 and be discharged into the recovery device 500. The drain control valve 241 is set to have a one-way conduction structure, so that water in the drain pipeline 240 can be prevented from flowing backwards, that is, sewage carrying filtered impurities is discharged into the recovery device 500 from the filter device 600, and the situation that the filtered impurities return to the filter device 600 from the recovery device 500 is avoided.

Further, a return control valve 231 is disposed on the return pipe 230 for controlling on/off of the return pipe 230. When the return water control valve 231 is opened, the water passing through the filtering device 600 is returned to the water tub 100 through the return pipe 230, thereby realizing circulation filtration of the washing water. When the filter device 600 is cleaned and the sewage needs to be discharged, the return water control valve 231 is closed to prevent the filtered water outlet 6102 from flowing out, thereby ensuring that the water in the filter device 600 is discharged into the recovery device 500 together with the filtered impurities.

In this embodiment, the pipeline for communicating the water container 100 and the filtering device 600 specifically includes:

the water containing barrel drain pipe 260 is connected with the water containing barrel 100 and the water inlet end of the circulating pump 400;

one end of the drain line 210 is connected with the water outlet end of the circulating pump 400;

the circulation line 220 has one end communicating with the drain line 210 and the other end connected to the water inlet 6101 of the filter device 600.

As shown in fig. 1 and 2, the washing machine performs a circulation filtering operation during washing and rinsing, including: the circulation pump 400 is turned on, the water in the water container 100 is sequentially conveyed to the filter device 600 through the water container drain pipe 260, the drain pipeline 210 and the circulation pipeline 220 for filtration, and the filtered water is returned to the water container 100 through the water return pipeline 230.

When the washing machine performs the circulation filtering operation, the return water control valve 231 is opened to conduct the return water pipe 230, and the drain control valve 241 is closed at the same time.

The washing machine may perform a circulation filtering operation in both a washing stage and each rinsing stage. Specifically, after the washing machine starts to supply water, the water level in the water tub 100 is detected, and when the water level reaches a preset water level, the circulation pump 400 is turned on to start the circulation filtering operation. Thus, the water in the water container 100 is prevented from being too small, and the circulating pump 400 sucks air to generate operation noise.

As shown in fig. 8, the washing machine performs a self-cleaning operation immediately before draining after washing or rinsing is completed, including: the return water control valve 231 is closed, the blowdown control valve 241 is opened to conduct the blowdown pipeline 240, the circulating pump 400 protects the running state, water in the water containing barrel 100 is led into the filtering device 600, and the water is discharged into the recovery device 500 after the filtering device is cleaned; meanwhile, the driving mechanism 660 is controlled to drive the filtering mechanism 620 to rotate in the filtering chamber 610.

As shown in fig. 9, the washing machine further performs a drain operation after the cleaning operation is completed: the drain control valve 241 keeps the drain line 240 in a conduction state, and the sewage carrying the filtered impurities in the filtering apparatus 600 is further discharged into the recycling apparatus 500. When the blowdown operation is performed, the driving mechanism 660 can be kept in an open state to drive the filtering mechanism 620 to continuously rotate, and the driving mechanism 660 can also be closed to keep the filtering mechanism 620 still in the filtering cavity 610.

In this embodiment, when the filtering apparatus 600 is installed in a washing machine, the axis of the filtering mechanism 620 is vertically disposed, and the sewage outlet 6103 is disposed at the bottom of the filtering cavity 610 to vertically discharge sewage downward. This arrangement further facilitates the efficient removal of the filtered impurities 501, since the filtered impurities 501 tend to collect at the bottom of the filter chamber 610 under the influence of gravity.

The above-mentioned self-cleaning operation and/or the drain operation is performed at least once in one complete washing course run by the washing machine. Preferably, the washing machine performs a self-cleaning operation and a drain operation before each draining.

In a further aspect of this embodiment, the drain line 210 communicates with the circulation line 220 through a switching device 270, and the switching device 270 includes:

a water inlet connected to the water outlet end of the drain line 210;

a first water outlet connected to the circulation line 220;

a second water outlet connected to an external discharge pipe 250 for discharging water to the outside of the washing machine;

and the switching mechanism controls one of the first water outlet and the second water outlet to be communicated with the water inlet.

In the above solution, the switching device 270 is arranged to alternatively connect the circulation line 220 and the outer discharge line 250 to the drain line 210. As shown in fig. 1 and 8, at this time, the switching mechanism switches on the water inlet and the first water outlet, that is, the water discharge pipeline 210 is communicated with the circulation pipeline 220, and water in the water containing barrel 100 is introduced into the filtering device 600 under the action of the circulation pump 400. As shown in fig. 9, at this time, the switching mechanism switches on the water inlet and the second water outlet, that is, the drain pipeline 210 is communicated with the external discharge pipeline 250, and under the action of the circulation pump 400, the washing water in the water containing drum 100 is pumped out through the water containing drum drain pipe 260, and then is finally conveyed to the external discharge pipeline 250 through the drain pipeline 210 to be discharged out of the washing machine.

Under the above-mentioned mode of setting, washing machine is inside need not to set up mutually independent loop filter pipeline and drain line respectively, also need not to set up drain pump and circulating pump respectively simultaneously, only through the intercommunication mode of auto-change device 270 action in order to change the pipeline, just can realize two kinds of functions of outside drainage and loop filter washing water respectively through same circulating pump 400. Therefore, the pipeline connection structure in the washing machine is simplified, the space occupied by the pipeline is saved, and meanwhile, the production cost can be reduced by only arranging one circulating pump 400.

When the washing machine performs the blowdown operation, the switching device 270 may be controlled to operate, so as to connect the drain pipeline 210 to the external drain pipeline 250. The circulation pump 400 maintains the operation state while the sewage in the filtering device 600 is discharged into the recovery device 500, and the remaining water in the water drum 100 can be discharged to the outside of the washing machine.

As shown in fig. 9 and fig. 10, in a further embodiment of the present embodiment, the recycling apparatus 500 specifically includes:

a housing 510 having a recovery chamber therein;

a filter assembly 520 disposed within the recovery chamber, dividing the recovery chamber into a first chamber 531 and a second chamber 532;

the sewage discharge pipeline 240 is communicated with the first chamber 531, sewage carrying the filtering impurities 501 enters the first chamber 531, the sewage enters the second chamber 532 after being filtered by the filtering assembly 520, and the filtering impurities 501 are collected in the first chamber 531.

In particular, the filter assembly 520 may be a frame horizontally disposed at a certain height within the recovery chamber and a filter screen laid on the frame. After the sewage carrying the filtering impurities 501 enters the first chamber 531, the water can enter the second chamber 532 through the filtering component 520, and the filtering impurities 501 are blocked by the filter screen and remain on the upper surface of the filtering component 520. The housing 510 is installed on the cabinet 10 of the washing machine to be inserted/withdrawn, and has an opening at an upper side, so that the user can withdraw the housing 510 from the cabinet 10, thereby cleaning the filtering impurities 501 attached to the upper surface of the filtering member 520.

Preferably, the second chamber 532 is provided with a water outlet to lead out the clean water entering the second chamber 532, so as to prevent the sewage discharged into the recycling device 500 from overflowing from the recycling device 500 due to an excessive amount of sewage. Meanwhile, when the user draws the housing 510 out of the cabinet 10, only the filtering impurities 501 on the filtering assembly 520 need to be cleaned, and when the filtering assembly 520 is detachably connected with the housing 510, the filtering assembly 520 can be directly detached for cleaning without completely taking the housing 510 off the washing machine, and the water in the second chamber 532 is manually poured out, so that the operation is more convenient.

Specifically, the water outlet of the second chamber 532 may be communicated with the main water inlet pipe of the washing machine through a pipeline, so that the clean water filtered to remove the filtered impurities 501 may be introduced into the water containing barrel 100 for recycling. Or, the water outlet is communicated with a drainage water channel of the washing machine through a pipeline, and the water filtered to remove the impurities 501 is merged into the drainage water flow of the washing machine and is discharged out of the washing machine together. Since the filtering foreign substances 501 are removed while passing through the filtering member 520, there is no filtering foreign substances 501, especially fine lint therein is discharged with the drainage water flow, thereby preventing the fine lint from being mixed into the ecological cycle.

In this embodiment, the washing machine performs a circulation filtering operation during washing and rinsing processes, so that water in the water container 100 circulates through the filtering device 600 to be filtered, thereby reducing the thread residue content in the water and improving the washing effect. After the circulating filtration operation is finished, self-cleaning operation and pollution discharge operation can be performed, and the filtered impurities 501 attached to the surface of the filtering mechanism 620 are discharged into the recovery device 500, so that the filtering device 600 is free from residual scraps. The recycling device 500 collects the filtering impurities 501, and prevents the filtering impurities 501 from converging into the drainage water flow to be discharged out of the washing machine, thereby preventing fine thread scraps therein from entering the ecological cycle.

EXAMPLE six

As shown in fig. 11, the present embodiment is different from the fifth embodiment in that: the axis of the filtering mechanism 620 is vertically arranged.

Specifically, the filtered water outlet 6102 on the filtering cavity 610 is disposed vertically downward, and the water inlet 6101 and the sewage outlet 6103 are opposite in direction and parallel to the horizontal direction. Preferably, the water inlet 6101 is disposed higher than the sewage outlet 6103, so that the filtering impurities remained in the filtering apparatus 600 can be sufficiently discharged, and the residual filtering impurities are prevented from generating bacteria in the filtering apparatus 600 and polluting the washing water.

In this embodiment, other structures and control methods of the washing machine are the same as those in the fifth embodiment, and the operation and effect similar to those in the fifth embodiment are also provided.

EXAMPLE seven

As shown in fig. 1 and 2, the present embodiment provides a control method of a washing machine according to the fifth embodiment, which is used for sufficiently discharging the sewage in the filtering device 600.

Specifically, the control method comprises the following steps:

starting the circulating pump 400, conducting the circulating filtering pipeline, and circularly filtering and rinsing by the washing machine;

after rinsing, the circulation pump 400 is turned off;

the driving mechanism 660 is started to drive the filtering mechanism 620 to rotate in the filtering cavity 610;

when the first set condition is reached, the circulation pump 400 is started, and the drain control valve 241 is opened to conduct the drain line 240;

and when the second set condition is reached, the circulating filtering pipeline is cut off.

Preferably, after the first set condition is reached, the driving mechanism 660 remains open, and the filtering mechanism 620 is driven to rotate continuously.

In this embodiment, the conducting circulation filtering pipeline includes: the switching device 270 conducts the filter device 600 and the water outlet side of the circulation pump 400, and opens the return control valve 231 to conduct the return pipe 230. The cut-off circulating filter pipeline comprises: the switching device 270 connects the outer discharge pipe 250 and the water outlet of the circulation pump 400.

It will be appreciated that the shut-off of the recirculation filter circuit can also be achieved by turning off the recirculation pump 400.

In the above scheme, the washing machine performs the circulation filtration of the rinsing water during the rinsing process, and the filtering device 600 and the circulation filtration pipeline are always filled with the rinsing water.

After the circulation pump 400 is turned off after rinsing, the water in the drain line 210 and the circulation line 220 flows back downward under the action of gravity, and at most, the water level in the drain line 210 is flush with the water level in the water container 100, and the line between the water level and the filter device 600 is filled with air. However, the filter device 600 is lower than the circulation line 220, and water therein does not flow back through the circulation line 220. The circulating pump 400 is closed and the return water control valve 231 is also closed, and at this time, the drain control valve 241 is in a closed state, and water in the filtering apparatus 600 is retained in the filtering chamber 610 and is not discharged to the outside.

After the driving device 600 is started, the filtering mechanism 620 is driven to rotate at a high speed, so that filtering impurities such as thread scraps attached to the surface are peeled off from the surface of the filtering mechanism 620 under the action of centrifugal force. At this time, since the backwater control valve 231 and the blowdown control valve 241 are both in a closed state, water in the filter cavity 610 does not flow out, the filter mechanism 620 rotating at a high speed can also stir water flow in the filter cavity 610, and the formed stirred water flow causes a certain impact force to the surface of the filter mechanism 620, so that lint can also fall off. Lint that is stripped from the surface of the filter mechanism 620 is dissolved into the water in the filter chamber 610.

When the first set condition is reached, the circulation pump 400 is started, and the drain control valve 241 is also opened, so that the drain pipeline 240 is conducted, and the sewage in the filtering apparatus 600 can be discharged from the drain outlet 6103. The circulation pump 400 is opened to press the air in the drainage pipeline 210 and the circulation pipeline 220 into the filtering device 600, so that the sewage carrying the thread scraps in the filtering device 600 is completely discharged through the sewage outlet 6103 under the air pressure, thereby avoiding the existence of sewage residue in the filtering device 600 and achieving good cleaning effect on the filtering device 600. The drain control valve 241 is opened while the circulation pump 400 is turned on, so that pressure generated when air is introduced into the filtering apparatus 600 is ensured, and thus, sufficient discharge of sewage in the filtering apparatus 600 can be ensured.

In order to prevent the water in the water container 100 from entering the filtering device 600 through the circulation pipeline 220 after the sewage in the filtering device 600 is completely discharged, the washing machine is preset with a second set condition, and when the second set condition is reached, the circulation filtering pipeline is cut off, and the water in the water container 100 is stopped from being conveyed to the filtering device 600.

In a specific aspect of this embodiment, the first setting condition may be that the circulation pump 400 is turned off for a first setting time t ₁ The second setting condition may be that the circulation pump 400 is turned on for a second setting time t ₂ 。

In the above scheme, the first set time t ₁ And a second set time t ₂ The specific value of (a) can be obtained in advance through a large number of experiments and directly written into a control program of the washing machine.

Specifically, the first set time t ₁ Is about the maximum time period required for the water level in the drain line 210 to start to fall until stop, and the second set time t ₂ Is about the shortest time period required for the water level in the drain line 210 to rise to near the top end of the drain line 210 after the circulation pump 400 is turned on. So, can guarantee that during circulating pump 400 closed, can get into a larger amount of air in the pipeline, simultaneously, effectively avoid circulating pump 400 to open the back condition that has water to get into filter equipment 600 again.

In another aspect of this embodiment, the water level height may also be used as the first setting condition and the second setting condition. Specifically, the first setting condition is: circulation ofThe water level in the pipe between the ring pump 400 and the filter 600 reaches the first set value H ₁ . The second setting condition is as follows: in the pipe between the circulation pump 400 and the filter unit 600, the water level reaches the second set value H ₂ . Wherein H ₁ <H ₂ 。

In this embodiment, the water level is specifically the height of the water level in the drain pipeline 210, and a water level detection device may be disposed in the drain pipeline 210 of the washing machine to detect the water level in the drain pipeline 210.

In the above-described aspect, the first set value H ₁ Is greater than and as close as possible to the maximum water level height of the washing machine to ensure that the water level in the drain line 210 can be lowered to the first set value H after the circulation pump 400 is turned off ₁ 。

The water level received from the washing machine in the drain line 210 rises to the second set value H ₂ Until the switching device 270 switches on the drain line 210 and the outer discharge line 250, there is generally a time difference therebetween. In order to prevent the water from entering the filter 600 after the circulation pump 400 is turned on due to the response delay, the second setting value H ₂ A certain difference Δ H is required between the value of (a) and the water level corresponding to the top end of the drain line 210. The specific value of the difference value delta H can be obtained through a large number of experiments carried out in advance, so that the fact that the water level received by the washing machine reaches the second set value H is guaranteed ₂ After the signal is received, the switching device 270 is controlled to complete the switching of the water circuit with sufficient response time.

In a further scheme of this embodiment, if the washing machine determines that the current operation process is the last rinsing stage in the washing program, the circulation pump 400 is turned off after the rinsing is finished, and the circulation pump 400 is turned on after the first set condition is reached.

If the washing machine judges that the current running process is not the last rinsing stage in the washing program, the following operations are executed after the rinsing is finished:

the circulation pump 400 maintains the operation state;

when the third set condition is reached, the circulating filtering pipeline is cut off;

in the above scheme, for the intermediate rinsing stage, since the washing machine needs to continue to operate after the washing machine, that is, the rinsing water circulates through the filtering device 600 for filtering, the sewage carrying the lint in the filtering device 600 may not be completely discharged, and only the lint attached to the surface of the filtering mechanism 620 needs to be removed.

After the rinsing is finished, the return water control valve 231 is closed, the drain control valve 241 is opened, the circulating pump 400 keeps the running state, the water in the water containing barrel 100 is continuously conveyed to the filtering device 600 under the action of the circulating pump 400, the interior of the filtering device 600 is washed, and the washed sewage is discharged into the drain pipeline 240 through the drain outlet 6103.

In this embodiment, the third setting condition may be that the rinsing is finished for a third preset time t ₃ The values of which are obtained in advance through experiments and written into a control program, so as to ensure that lint attached to the surface of the filter mechanism 620 can be basically removed.

Alternatively, the water level in the water drum 100 may be lowered to a predetermined value Δ H ₁ When the circulation filtering pipeline is cut off, that is, the switching device 270 is controlled to connect the drainage pipeline 210 and the external drainage pipeline 250, the circulation pump 400 continues to operate, and the residual water in the water containing barrel 100 is drained out of the washing machine.

In the preferred scheme of this embodiment, after rinsing, start actuating mechanism 660, drive filtering mechanism 620 and rotate at a high speed in filtering cavity 610, can stir the water in filtering cavity 610, make the adnexed thread scraps under the dual function of centrifugal force and the water current of stirring, peel off from filtering mechanism 620 surface, merge into the water in filtering cavity 610, discharge filtering cavity 610 by drain 6103 again, the cleaning efficiency of thread scraps is high.

In this embodiment, the washing machine performs the operation of turning off the circulation pump 400 and then turning on the circulation pump 400 only when the last rinsing is finished, so as to completely drain the sewage in the filtering apparatus 600. And when the middle rinsing is finished, the circulating pump 400 keeps the running state, so that the influence on the service life of the circulating pump 400 caused by frequent opening and closing of the circulating pump in the running process of the washing machine is avoided.

In this embodiment, the washing machine also cleans the filtering device 600 after the washing is finished, and the specific control method is as follows:

starting the circulating pump 400, conducting the water outlet end of the circulating pump 400 and the filtering device 600 by the switching device 270, opening the water return control valve 231, and carrying out circulating filtering washing by the washing machine;

after washing, the circulating pump 400 keeps running, the backwater control valve 231 is closed, and the blowdown control valve 241 is opened;

when the fourth set condition is reached, the switching device 270 connects the water outlet end of the circulation pump 400 and the external discharge pipeline 250.

Wherein, the fourth setting condition may be that the washing end reaches a fourth preset time t ₄ Or the water level falling height in the water container 100 can reach the preset value delta H ₂ 。

After washing, the circulation filtering rinsing is required in the subsequent process of the washing program, and similar to the intermediate rinsing, the sewage in the filtering device 600 is not required to be completely discharged, and the circulation pump 400 can be kept in a running state without being turned off.

In this embodiment, after the washing and the intermediate rinsing are finished, the washing machine controls the circulating pump 400 to keep operating, the water in the water container 100 is transported to the filtering device 600 for washing, and the sewage after washing is discharged from the sewage outlet 6103 of the filtering device 600. After the last rinsing is finished, the circulating pump 400 is closed firstly, air enters the pipeline, the circulating pump 400 is restarted, air in the pipeline is pressed into the filtering device 600, so that sewage in the pipeline is completely discharged, no sewage residue exists in the filtering device 600 after the washing machine stops running, and bacteria breeding can be effectively avoided. Meanwhile, the washing machine performs the operation of turning off the circulation pump 400 first and then turning on the circulation pump after the last rinsing is finished, thereby reducing unnecessary turning on and off operations of the circulation pump 400 and prolonging the service life of the circulation pump 400.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A washing machine, characterized by comprising:

a water-containing cylinder is arranged in the water tank,

a water return pipeline, wherein the water inlet end of the water return pipeline is communicated with the filtering device, the water outlet end of the water return pipeline is communicated with the water containing barrel, and water filtered in the filtering device is sent into the water containing barrel;

2. The washing machine as claimed in claim 1, wherein a window pad is provided at a tub opening of the water tub, and the filtered water supplied in the return water pipe passes through the window pad to enter the water tub.

3. The washing machine as claimed in claim 2, wherein the window pad is provided with a window pad water return port communicated with the water containing barrel, and the water outlet end of the water return pipeline is connected to the window pad water return port;

4. The washing machine as claimed in claim 2, wherein the window pad is mounted with a spray head assembly; the water outlet end of the water return pipeline is connected with the spray head component; or the water outlet end of the water return pipeline is connected to a spraying pipeline for supplying water to the spray head assembly.

5. The washing machine as claimed in claim 1, wherein the water drum is provided with a water drum return port, and the water outlet end of the return pipeline is connected with the water drum return port;

6. The washing machine as claimed in claim 5, wherein a buffer member is provided at the water outlet end of the water return pipeline, and the water return pipeline is connected with the water return port of the water containing barrel through the buffer member;

preferably, the buffer is a bellows having a certain length.

7. The washing machine as claimed in claim 1, further comprising a main water inlet pipeline connected to an external water source, wherein the water outlet end of the water return pipeline is communicated with the main water inlet pipeline.

8. The washing machine as claimed in claim 7, wherein a detergent box is arranged on the main water inlet pipeline, a water inlet of the detergent box is communicated with an external water source, and a water outlet is communicated with the water containing barrel;

the washing agent box is provided with a filtered water inlet, the water outlet end of the water return pipeline is connected with the filtered water inlet, and the filtered water conveyed in the water return pipeline enters the water containing barrel through the washing agent box.

9. A washing machine as claimed in any one of claims 1 to 8 wherein the drain outlet of the filtration means is connected to the recovery means via a drain line, the drain line being provided with a drain control valve for controlling the on/off of the drain line;

10. A control method of a washing machine according to any one of claims 1 to 9, characterized in that the washing machine further comprises a circulation pump provided on a pipe communicating the water drum and the water inlet of the filtering device, or on the return pipe;