CN115613304A - Washing machine and control method thereof - Google Patents

Abstract

The invention belongs to the technical field of washing machines, and discloses a washing machine and a control method thereof. The washing machine includes: a water storage tank, a filtering device, which has a water inlet connected to the water storage tank, receives water in the water storage tank for filtering, and has a water storage tank for filtering. The sewage outlet that discharges the filtered impurities to the outside; the return water pipeline, its water inlet end is connected with the filter device, and the water outlet end is connected with the water storage cylinder, and the filtered water in the filter device is sent into the water storage cylinder; the recovery device, connected with the filter device The sewage outlet is connected to collect the filter impurities discharged from the filter device. In the washing machine of the present invention, the water in the water storage cylinder can be transported to the filter device for filtration, and then returned to the water storage cylinder through the return water pipeline. During the washing and rinsing process, the water in the water storage cylinder is continuously circulated through the filter The device can reduce the lint content in the water and improve the washing effect.

Description

A washing machine and its control method

technical field

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

Background technique

During the washing process of the clothes by the washing machine, due to the friction between the clothes and between the clothes and the washing machine itself, the clothes will produce lint and fall off and mix into the washing water. If the lint in the washing water cannot be removed, it is likely to adhere to the surface of the clothes after washing, affecting the washing effect of the clothes. For this reason, a filter for filtering lint is installed on the existing washing machine, and washing water is circulated through the filter during the washing process to remove lint from the washing water.

The filter of the existing washing machine is generally arranged inside the inner tub or the drain pump, and is used to filter lint and sundries in the washing water. However, after the washing machine has been used for a long time, the filter will be filled with lint and debris, which will affect the filtering effect of the filter, cause the blockage of the drain valve/drain pump, and easily breed bacteria, so it needs to be cleaned in time, otherwise It will pollute the washing water, cause secondary pollution to clothes, and affect the health of users. However, most washing machines require the user to remove the filter and clean it manually, which is inconvenient to operate.

On the other hand, for some filters, due to the clogging of the filter holes on the filter by the lint, the aperture of the filter hole is usually set larger, but this also causes the fine lint on some clothes to be unable to be filtered, resulting in this part of the line. The crumbs stick to the clothes and affect the user experience. At the same time, some lint will be discharged with the water flow and enter the ecological cycle, which will eventually affect human health.

Due to the above-mentioned problems, a filter capable of self-cleaning has been proposed in the prior art. The lint inside the filter, etc. will be shed by flushing or vibrating, and then flow into the drain pipe of the washing machine together with the flushing water and discharged. washing machine. However, in the above-mentioned scheme, since the lint under the washing directly flows into the drainage water flow of the washing machine, it will still enter the ecological cycle and pose a threat to human health.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a washing machine and its control method. A filter device is installed in the washing machine, and the water in the water tank can be transported to the filter device for filtration, and then passed through the return pipe. Back to the water tank, during the washing and rinsing process, by driving the water in the water tank to circulate through the filter device continuously, the lint content in the water can be reduced and the laundry effect can be improved. At the same time, the filtered impurities can be discharged into the recycling The device collects it instead of being discharged directly with the washing machine drainage, which reduces the possibility of fine lint entering the ecological cycle with the water flow.

In order to solve the problems of the technologies described above, the present invention adopts the basic idea of technical solution to be:

A washing machine, comprising:

bucket,

The filtering device has a water inlet connected to the water storage cylinder, receives the water in the water storage cylinder for filtering, and also has a sewage outlet for discharging filtered impurities;

The water return pipeline, the water inlet end is connected with the filter device, and the water outlet end is connected with the water storage cylinder, and the filtered water in the filter device is sent into the water storage cylinder;

The recovery device communicates with the sewage outlet of the filter device and is used to collect the filter impurities discharged from the filter device.

Further, a window pad is provided at the mouth of the water storage cylinder, and the filtered water conveyed in the return water pipeline enters the water storage cylinder through the window pad.

Further, the window pad is provided with a window pad return port in communication with the water storage cylinder, and the water outlet end of the return water pipeline is connected to the window pad return port;

Preferably, the water return port of the window mat is arranged at the top area of the window mat.

Further, a sprinkler assembly is installed on the window pad; the water outlet end of the return water pipeline is connected to the sprinkler assembly; or, the water outlet end of the return water pipeline is connected to a spray pipeline that supplies water to the sprinkler assembly.

Further, the water storage cylinder is provided with a water storage cylinder return port, and the water outlet end of the return water pipeline is connected to the water storage cylinder return water port;

Preferably, the water return port of the water storage cylinder is arranged on the cylinder wall of the water storage cylinder.

Further, a buffer is provided at the water outlet end of the return pipe, and the return pipe is connected to the water return port of the water storage cylinder through the buffer;

Preferably, the buffer member is a bellows with a certain length.

Further, the washing machine further includes a main water inlet pipeline connected to an external water source, and the water outlet end of the return water pipeline communicates with the main water inlet pipeline.

Further, a detergent box is provided on the main water inlet pipeline, the water inlet of the detergent box is communicated with an external water source, and the water outlet is communicated with a water storage cylinder;

The detergent box is provided with a filtered water inlet, the water outlet end of the return water pipeline is connected to the filtered water inlet, and the filtered water transported in the return water pipeline enters the water storage cylinder through the detergent box.

Further, the sewage outlet of the filtering device is connected with the recovery device through a sewage pipeline, and a sewage control valve for controlling the on-off of the sewage pipeline is arranged on the sewage pipeline;

Preferably, when the blowdown control valve is opened, the blowdown pipeline is unidirectionally connected from the filter device to the recovery device.

Another object of the present invention is to provide a control method for the above-mentioned washing machine, the washing machine further includes a circulation pump, and the circulation pump is arranged on the pipeline connecting the water storage cylinder and the water inlet of the filter device, or arranged on the On the return water pipeline;

The control method includes: turning on the circulation pump, transporting the water in the water storage cylinder to the filter device for filtering, and returning the filtered water to the water storage cylinder through the return pipeline.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

In the present invention, the water tank of the washing machine is connected with the water inlet of the filter device, and the water to be filtered is passed into the filter device, and the filtered water returns to the water tank through the return pipe, and drives the water tank in the washing and rinsing process. The water is continuously circulated through the filter device for filtration, which can reduce the lint content in the water and improve the laundry effect. At the same time, the filter impurities such as lint filtered out by the filter device are discharged into the recovery device for collection, and will not be discharged directly with the washing machine drainage, avoiding the situation where fine lint is mixed into the ecological cycle and endangers the ecological environment and human health.

In the present invention, the return water pipeline connected to the filter device returns water to the water storage cylinder through the window pad at the mouth of the water storage cylinder, so that the window pad can be washed while returning water to ensure the cleanliness of the window pad. When the return water pipeline is connected to the spray assembly or the spray pipeline, the spray effect on the inner clothes can be realized while returning the water, and there is no need to separately enter the spray water from the outside of the washing machine, which saves the water consumption in the laundry process.

In the present invention, the water outlet end of the return water pipeline is directly connected to the water storage cylinder, which can reduce the extension length of the return water pipeline and save space. By setting the buffer at the water outlet end of the return pipe, the vibration of the water storage cylinder can be buffered to a certain extent during the operation of the washing machine, preventing the vibration of the water storage cylinder from causing the connection between the return water pipeline and the return water outlet of the water storage cylinder to loosen, resulting in water leakage .

In the present invention, the return water pipeline is connected to the detergent box, and the filtered water enters the water tank through the detergent box, which can further flush the detergent box to avoid incomplete dissolution of the detergent.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations to the present invention. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. In the attached picture:

Fig. 1 is the structural representation of washing machine in the embodiment of the present invention;

Fig. 2 is the enlarged schematic view of place A in Fig. 1 of the present invention;

3 is a schematic structural view of a window pad in Embodiment 1 of the present invention;

Fig. 4 is a schematic structural view of the washing machine in Embodiment 2 of the present invention;

5 is a schematic structural view of the washing machine in Embodiment 3 of the present invention;

6 is a schematic structural view of a filter device in Embodiment 4 of the present invention;

Fig. 7 is the schematic diagram of B-B section among Fig. 6 of the present invention;

Fig. 8 is a schematic diagram of the self-cleaning operation performed by the washing machine in Embodiment 5 of the present invention;

Fig. 9 is a schematic diagram of the washing machine performing the sewage discharge operation in Embodiment 5 of the present invention;

Fig. 10 is an enlarged schematic diagram of place C in Fig. 9 of the present invention;

Fig. 11 is a schematic structural view of the washing machine in Embodiment 6 of the present invention.

In the figure: 10, box body; 100, water tank; 101, water tank return port; 110, window pad; 111, window pad return port; 112, nozzle assembly; 113, downlight; 114, drying air duct inlet; 210, drainage pipeline; 220, circulation pipeline; 230, return water pipeline; 231, return water control valve; 240, sewage pipeline; 241, sewage control valve; 250, external drainage pipeline; 260, water storage tube drainage pipe ; 270, switching device; 300, detergent box; 301, filtered water inlet; 310, second water inlet pipe; 400, circulation pump; 500, recovery device; 501, filter impurities; 510, shell; 520, filter assembly; 531, the first chamber; 532, the second chamber;

600, filtering device; 601, the first limit surface; 602, the second limit surface; 603, the third limit surface; 604, the fourth limit surface; 605, the fifth limit surface; 606, the sixth limit surface 610, filter cavity; 6101, water inlet; 6102, filtered water outlet; 6103, sewage outlet; 6104, installation port; 611, sealing support part; 612, sleeve part; 613, reinforcing rib; Mechanism; 621, water outlet joint; 622, rotation support part; 623, filter screen support part; 624, motor installation part; 625, filter screen; 631, first bearing; 632, second bearing; 641, first seal; 642, the second seal; 643, the third seal; 650, the flange of the filter cavity; 651, the connection part; 652, the socket part; 653, the through port; 660, the driving mechanism.

It should be noted that these drawings and text descriptions are not intended to limit the concept scope of the present invention in any way, but illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments.

detailed description

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

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "inner" and "outer" are based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations on the Invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral ground connection; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment one

As shown in Figures 1 to 3, the washing machine described in this embodiment includes:

Water tank 100,

The filtering device 600 has a water inlet 6101 communicating with the water storage cylinder 100, receives the water in the water storage cylinder 100 for filtering, and also has a sewage outlet 6103 for discharging filtered impurities;

The return water pipeline 230, its water inlet end communicates with the filter device 600, and its water outlet end communicates with the water storage cylinder 100, and sends the filtered water into the water storage cylinder 100;

The recovery device 500 communicates with the sewage outlet 6103 of the filter device 600 and is used to collect the filtered impurities discharged from the filter device 600 .

In the above solution, the water storage cylinder 100 is connected with the water inlet 6101 of the filter device 600 through a pipeline, and the filter device 600 is connected with the water storage cylinder 100 through the return water pipeline 230 , thereby forming a circulating filter pipeline outside the water storage cylinder 100 . The water in the water storage tank 100 flows along the circulation filter pipeline and is filtered by the filter device 600 , thereby reducing the lint content in the water storage tank 100 .

Specifically, a circulation pump 400 is provided on the pipeline connecting the water storage cylinder 100 and the water inlet 6101 of the filter device 600. When the circulation pump 400 is turned on, the water to be filtered in the water storage cylinder 100 can pass into the filter device 600 through the pipeline, and pass through the filter device. 600 to filter and remove the filter impurities such as lint therein, and then return to the water storage cylinder 100 through the return water pipeline 230 . During the washing and rinsing process of the washing machine, by continuously driving the circulating flow in the water tank 100 to pass through the filter device 600, the content of lint in the water can be reduced and the washing effect can be improved.

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

In this embodiment, the filtering device 600 includes:

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

The filter mechanism 620 is arranged inside the filter cavity 610 , divides the inside of the filter cavity 610 into an inner cavity and an outer cavity, and has a water outlet joint 621 communicating with the filtered water outlet 6102 .

The water to be filtered enters the outer cavity of the filter cavity 610 through the water inlet 6101, enters the inner cavity after being filtered by the filter mechanism 620, flows out from the water outlet joint 621, and is discharged from the filter device 600 from the filtered water outlet 6102. The filtered impurities adhere to the outer surface of the filter mechanism 620 . The filter device 600 of this embodiment has the function of automatically cleaning the attached filter impurities, and the filter impurities stripped from the surface of the filter mechanism 620 after cleaning can be discharged through the sewage outlet 6103 . By setting the recovery device 500 to collect the discharged filter impurities, instead of passing the filter impurities into the drainage water flow of the washing machine and discharging them directly, it is possible to prevent the fine lint in the filter impurities from directly entering the ecological cycle with the drainage water flow, which is harmful to the ecological environment and the human body. health impact.

In a further solution of this embodiment, a window gasket 110 is provided at the mouth of the water storage cylinder 100 , and the filtered water conveyed in the return water pipeline 230 enters the water storage cylinder 100 through the window gasket 110 .

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

Preferably, the water return port 111 of the window mat is disposed on the top area of the window mat 110 .

In the above scheme, the return water pipeline 230 is connected to the window cushion water return port 111 on the window cushion 110 , and the filtered water flows out from the return water pipeline 230 , and can flow through the inner surface of the window cushion 110 into the water storage cylinder 100 . In this way, in the process of returning water to the water storage cylinder 100, the window mat 110 can also be washed to avoid dirt accumulation on the inside of the window mat 110, especially in the wrinkled part, and the cleanliness of the window mat 110 can be ensured.

In detail, as shown in FIG. 3 , a spray head assembly 112 is provided on the window mat 110 in this embodiment, and the spray head assembly 112 can be connected to a spray pipeline for water supply, so as to spray the laundry. A downlight 113 is also arranged on the window mat 110, and the downlight 113 can illuminate the inner space when the user opens the door of the washing machine, which is convenient for the user to pick and place the clothes.

The washing machine in this embodiment also has the function of drying clothes, and a drying air duct communicating with the water tub 100 is arranged inside the washing machine. Wherein, the inlet 114 of the drying air duct is also connected to the window mat 110 to realize the purpose of the drying air duct passing the drying air into the water storage cylinder 100 .

In another solution of this embodiment, the window pad may not be separately provided with a window pad water return port, but the water outlet end of the return water pipeline may be directly connected to the spray head assembly on the window pad. The water in the return pipe passes through the nozzle assembly and returns to the water storage cylinder in the form of spraying, which can realize the spraying and rinsing of the clothes while returning the water, without the need for separate water spraying from the outside of the washing machine, saving the laundry process of water consumption.

In still another solution of this embodiment, the spray assembly is connected with a spray pipeline for supplying water to the spray head assembly, and the water outlet end of the return water pipeline is connected with the spray pipeline. When the water in the water storage cylinder is circulated and filtered, the water in the return water pipeline can be passed into the spray pipeline, and then the clothes can be sprayed through the spray head assembly. When the circulating pump is not working, that is, when there is no circulated and filtered water in the return water pipeline, water can also be fed from the outside of the washing machine, and water can be supplied to the nozzle assembly through the spray pipeline to realize the spray function. No matter whether the washing machine circulates and filters the water in the water storage cylinder, the realization of the spraying function is not affected.

In this embodiment, the return water pipeline 230 used to deliver the filtered water to the water storage cylinder 100 is directly or indirectly connected to the window pad 110 at the mouth of the water storage cylinder 100, so that the inner side of the window pad 110 can be realized while returning water. The flushing of clothes, or the spray flushing of clothes, improves the user experience.

Embodiment two

As shown in FIG. 4 , the difference between this embodiment and the above-mentioned first embodiment is that: the water tank 100 is provided with a water tank return port 101 , and the water outlet end of the return water pipeline 230 is connected to the water tank return port 101 .

In a preferred solution of this embodiment, the water return port 101 of the water storage cylinder is arranged on the cylinder wall of the water storage cylinder 100 .

In this embodiment, the filter device 600 is arranged above the water storage cylinder 100, and is located in the middle area of the water storage cylinder 100 in the axial direction of the water storage cylinder 100. Compared with the scheme of 110 for water return, the distance between the filtered water outlet 6102 of the filter device 600 and the water return port 101 of the water storage cylinder is shortened, thereby reducing the set length of the return water pipeline 230 and simplifying the waterway structure.

In a further solution of this embodiment, a buffer member (not shown in the figure) is provided at the water outlet end of the return water pipeline 230 , and the return water pipeline 230 is connected to the water return port 101 of the water storage cylinder through the buffer member.

Preferably, the buffer member is a bellows with a certain length.

Since the water tank 100 vibrates to a certain extent during the operation of the washing machine, in the above solution, the return water pipeline 230 is connected to the water tank return port 101 through a buffer, and the buffer can play a certain role in the vibration of the water tank 100. buffering effect. For example, a bellows of a certain length is provided at the water outlet end of the return pipe 230, and the bellows is connected to the water return port 101 of the water storage cylinder, and the displacement generated by the vibration of the water storage cylinder 100 can be absorbed by the bellows, thereby avoiding the The vibration of the water cylinder 100 causes the connection structure between the return water pipeline 230 and the water return port 101 of the water storage cylinder to loosen, resulting in water leakage.

In this embodiment, the water tank 100 is provided with the water tank return port 101, and the return water pipeline 230 is directly connected to the water tank 100, which shortens the return water path. The return water pipeline 230 is short in length and simple in structure.

Embodiment three

As shown in FIG. 5 , the difference between this embodiment and the first embodiment above is that the washing machine further includes a main water inlet pipeline connected to an external water source, and the water outlet end of the return water pipeline 230 communicates with the main water inlet pipeline. The main water inlet pipeline is used to feed external water into the water storage cylinder 100 .

Further, a detergent box 300 is provided on the main water inlet pipeline, the water inlet of the detergent box 300 communicates with an external water source, and the water outlet communicates with the water storage cylinder 100 .

Specifically, the main water inlet pipeline includes:

The first water inlet pipe (not shown in the figure), two ends are connected with the water inlet valve of washing machine and the water inlet of detergent box 300;

Two ends of the second water inlet pipe 310 are respectively connected with the water outlet of the detergent box 300 and the water inlet of the water storage cylinder 100 .

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

In this embodiment, the return water pipeline 230 is connected to the detergent box 300 , and the filtered water first enters the detergent box 300 , and then enters the water container 100 from the detergent box 300 . During the water return process, the inside of the detergent box 300 can be further flushed to avoid incomplete dissolution of the detergent.

Embodiment four

As shown in Fig. 1, Fig. 7 and Fig. 8, this embodiment is a further limitation of the above-mentioned embodiments one to three. In the filter device 600, the filter mechanism 620 is rotatably installed inside the filter cavity 610, and the filter device 600 It also includes a drive mechanism 660 connected with 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 drive mechanism 660 drives the filter mechanism 620 to rotate, and the filter impurities attached to the surface of the filter mechanism 620 can fall off under the action of centrifugal force, thereby being discharged through the sewage outlet 6103 . When there is water in the filter cavity 610, the rotation of the filter mechanism 620 can also stir the water in the filter cavity 610, and the generated turbulent water flow can further act on the surface of the filter mechanism 620 to assist in stripping and filtering impurities.

The attached filter impurities are stripped from the surface of the filter mechanism 620 under the double action of centrifugal force and turbulent water flow, realizing the automatic cleaning of the filter device 600 in this embodiment, without the need for the user to remove the filter device 600 for manual cleaning, and the removal of filter impurities High efficiency and good cleaning effect.

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

Filtration device 600 also includes:

The first bearing 631 is sleeved on the water outlet joint 621;

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

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

The filter screen support part 623 is located inside the filter cavity 610, and the filter screen 625 covers the surface of the filter screen support part 623;

The water outlet joint 621 is arranged at the left end of the filter screen support part 623, and is rotatably inserted in the seal support part 611;

The rotating supporting part 622 is arranged at the right end of the filter screen supporting part 623 and is rotatably connected with the filtering cavity 610 .

In the above scheme, the first bearing 631 is provided between the water outlet joint 621 and the sealing support part 611 to support the water outlet joint 621, so that the rotation of the water outlet joint 621 in the sealing support part 611 is smoother, and the structure is stable at the same time, which can ensure the filtration The stable rotation of the mechanism 620 in the filter cavity 610 . The first seal 641 is arranged on the right side of the first bearing 631, and the washing water in the filter cavity 610 cannot enter the gap between the water outlet joint 621 and the sealing support part 611, preventing the first bearing 631 from contacting with water, avoiding The failure of the first bearing 631 ensures the effect of the first bearing 631 . At the same time, the first sealing member 641 also prevents unfiltered washing water from flowing out from the filtered water outlet 6102 through the sealing support portion 611 , which affects the removal efficiency of the filter device 600 for lint.

In the specific solution of this embodiment, the first sealing member 641 is sleeved on the water outlet joint 621, the inner wall of the first sealing member 641 is in sealing connection with the outer wall of the water outlet joint 621, and the outer wall of the first sealing member 641 is connected to the sealing support portion 611. The inner wall is rotatable and hermetically sealed.

In a further solution of this embodiment, the filter device 600 further includes a second seal 642, which is arranged on the side of the first bearing 631 facing away from the interior of the filter cavity 610, and blocks the water outlet joint 621 and the seal support portion. The gap between 611.

Specifically, the second sealing member 642 is sleeved on the water outlet joint 621, the inner wall of the second sealing member 642 is in sealing connection with the outer wall of the water outlet joint 621, and the outer wall of the second sealing member 642 is rotatably sealed with the inner wall of the sealing support part 611. connect.

In the above solution, a second seal 642 is provided on the left side of the first bearing 631 , and the water flowing out through the water outlet joint 621 can be blocked by the second seal 642 and will not contact the first bearing 631 . The first bearing 631 is located between the first seal 641 and the second seal 642, which ensures that the installation environment of the first bearing 631 is water-free to the greatest extent, and avoids the rust of the first bearing 631 when it encounters water, which affects the rotation of the filter mechanism 620 smoothness.

In a further solution of this embodiment, the inner wall of the sealing support part 611 has a stepped structure, and the first limiting surface 601, the second limiting surface 601, the second limiting surface, which has a ring structure and gradually decreases in inner diameter, are sequentially formed from one end of the sealing supporting part 611 to the outside of the filter cavity 610. The limiting surface 602 and the third limiting surface 603 .

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

In the above solution, a plurality of vertical annular limiting surfaces are formed by the inner wall of the seal support part 611 with a stepped structure, which abut against the respective left surfaces of the first seal 641 , the first bearing 631 and the second seal 642 respectively. , can restrict the movement of the above three in the axial direction of the water outlet joint 621 , and prevent the loosening of the matching structure between the water outlet joint 621 and the sealing support part 611 during the rotation of the filter mechanism 620 .

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

By setting the outer diameter of the left end of the water outlet joint 621 to be smaller than that of the right end, a fourth limit surface 604 towards the left is formed at the sudden change in the outer diameter, abutting against the right side surface of the first bearing 631 . In this way, both sides of the first bearing 631 have limiting structures, and the structure is more stable.

In this embodiment, the end of the sealing support part 611 away from the filter cavity body 610, that is, the left end of the sealing support part 611 is connected to the filter cavity flange 650, and the middle part of the filter cavity flange 650 has a through-hole 653 communicating with the water outlet joint 621. The outer periphery of the through opening 653 extends away from the sealing support portion 611 to form a connecting portion 651 .

Preferably, the surface of the flange 650 of the filter chamber facing the side of the sealing support part 611 has a protruding insertion part 652 , and the insertion part 652 is inserted into the opening at the left end of the sealing support part 611 .

In the above scheme, the left end of the sealing support part 611 is connected to the filter cavity flange 650, and a connecting part 651 is formed on the filter cavity flange 650. The outer diameter of the connecting part 651 is smaller than the outer diameter of the sealing supporting part 611, and the inner diameter of the connecting part 651 It is preferably equal to the inner diameter of the water outlet joint 621 . When the filter device 600 is installed in the washing machine, it is connected to the pipeline through the connecting part 651 to realize the derivation of filtered washing water without lint. Compared with the way that the pipeline is directly connected to the left end of the sealing support part 611, the installation is easier .

The right side of the filter chamber flange 650 has an inserting portion 652 inserted into the opening of the left end of the sealing support portion 611 , which facilitates the positioning of the filter chamber flange 650 and the sealing support portion 611 during assembly. A number of fixing parts are respectively arranged on the periphery of the filter cavity flange 650 and the sealing support part 611 , and screws pass through the fixing parts to realize the fixing of the filter cavity flange 650 and the sealing support part 611 .

In a further solution of this embodiment, the rotation axis of the rotation support part 622 at the right end of the filter mechanism 620 extends to the outside of the filter cavity 610 , and the filter cavity 610 is provided with an installation port 6104 for the rotation support part 622 to pass through. The rotating support part 622 is in a rotatable and sealed connection with the installation port 6104 .

In this embodiment, since the filter mechanism 620 is driven to rotate by the drive mechanism, the drive mechanism is arranged outside the filter cavity 610 to avoid contact with the washing water. For this reason, the rotating support part 622 protrudes from the right end of the filter cavity 610, and a motor mounting part 624 is provided at the right end of the rotating supporting part 622 for connecting with a driving mechanism, such as a motor.

Further, the outer circumference of the installation port 6104 extends outward from the filter cavity 610 along the axis of the rotating support portion 622 to form a sleeve portion 612 , and the third sealing member 643 is sheathed on the rotating support portion 622 . The inner wall of the third sealing member 643 is sealingly connected with the outer wall of the rotating support portion 622 , and the outer wall of the third sealing member 643 is rotatably and sealingly connected with the inner wall of the sleeve portion 612 .

A second bearing 632 is provided between the sleeve part 612 and the rotating support part 622 , and the second bearing 632 is sleeved on the rotating supporting part 622 and located on the side of the third seal 643 facing the outside of the filter chamber 610 .

In the above scheme, the setting of the third sealing member 643 prevents the water in the filter cavity 610 from leaking from the installation port 6104, and the setting of the second bearing 632 can support the rotation support part 622, ensuring that the rotation support part 622 is in contact with the sleeve. The relative rotation of the cylindrical portion 612 is smoother. The second bearing 632 is arranged on the right side of the third seal 643 and does not contact with the water in the filter cavity 610 to avoid failure.

In the preferred solution of this embodiment, the inner diameter of the end of the sleeve part 612 near the outside of the filter cavity 610 is smaller than the inner diameter of the other end, and a ring structure is formed on the inner wall of the sleeve part 612, and is perpendicular to the axis of the rotating support part 622 The fifth limiting surface 605. A surface of the third sealing member 643 facing the outside of the filter cavity 610 abuts against the fifth limiting surface 605 .

The outer diameter of one end of the rotating support part 622 close to the outside of the filter cavity 610 is smaller than the outer diameter of the other end, and a sixth limiting surface with a ring structure and perpendicular to the axis of the rotating supporting part 622 is formed on the outer wall of the rotating supporting part 622 606. The surface of the second bearing 632 facing the inside of the filter cavity 610 abuts against the sixth limiting surface 606 .

In the above solution, the inner diameter of the right end of the sleeve portion 612 is smaller than the inner diameter of the left end, and a fifth limiting surface 605 toward the left is formed at a sudden change in the inner diameter of the sleeve portion 612 , abutting against the right side surface of the third sealing member 643 . The outer diameter of the right end of the rotating support portion 622 is smaller than the outer diameter of the left end, and a sudden change in the outer diameter forms a sixth limiting surface 606 toward the right, abutting against the left surface of the second bearing 632 . The above structure restricts the movement of the third sealing member 643 and the second bearing 632 in the axial direction of the rotation support part 622, and the structure is stable.

In this embodiment, the first sealing member 641 , the second sealing member 642 and the third sealing member 643 are all oil seals, and the right wall of the filter cavity 610 and its peripheral side wall are separately provided. First install the filter mechanism 620, and the first seal 641, the second seal 642 and the first bearing 631 at the left end to the interior of the filter chamber 610 as a whole, and install the third seal 643 and the second bearing 632 at the right end , and finally fasten the right wall of the filter cavity 610 with its surrounding side wall.

In this embodiment, the cross-sectional area of the middle region of the filter screen support part 623 is constant, and its left and right ends have a tapered structure, so that the partial surface of the filter screen 625 is inclined to facilitate the falling off of attached lint.

In this embodiment, the direction of the water inlet 6101 and the sewage outlet 6103 on the filter cavity 610 is perpendicular to the axial direction of the filter mechanism 620 .

Preferably, the filter chamber 610 has a cylindrical structure, the water inlet 6101 is arranged near the right end of the filter chamber 610, the sewage outlet 6103 is arranged near the left end of the filter chamber 610, and the water inlet 6101 and the sewage outlet 6103 are located around the filter chamber 610 The upward position is symmetrical.

In the above scheme, the position of the water inlet 6101 is as far away from the water outlet joint 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 set up and down, and are staggered in the axial direction of the filter cavity 610 , which is beneficial to fully discharge the sewage after cleaning the filter device 600 in the filter cavity 610 .

In a further solution of this embodiment, the outer wall of the sealing support part 611 is provided with reinforcing ribs 613 extending radially of the sealing supporting part 611 , and the reinforcing ribs 613 are connected to the surface of the filter cavity 610 where the filtered water outlet 6102 is located.

Since the sealing support part 611 protrudes a certain length from the left end surface of the filter cavity 610 , the reinforcing rib 613 supports its peripheral side wall from the outside, ensuring the strength of the sealing support part 611 .

In this embodiment, a rotatable filter mechanism 620 is provided in the filter cavity 610 of the filter device 600. After the washing water to be filtered enters the filter cavity 610, the water filtered to remove lint enters the filter mechanism 620 and passes through the water outlet connector 621. flow out. The filtered lint is attached to the outer surface of the filter mechanism 620. By driving the filter mechanism 620 to rotate, the lint can be separated and discharged from the sewage outlet 6103 along with the water in the filter cavity 610, realizing the self-cleaning function of the filter device 600 without User cleanup manually.

Both ends of the filter mechanism 620 are respectively provided with a first bearing 631 and a second bearing 632 for support, ensuring smooth and stable rotation of the filter mechanism 620 in the filter cavity 610 . At the same time, through the arrangement of the first seal 641 , the second seal 642 and the third seal 643 , the first bearing 631 and the second bearing 632 are prevented from being in contact with water, and failure of both is avoided.

Embodiment five

As shown in Figures 1 and 2, this embodiment is a further limitation of the fourth embodiment above. The sewage outlet 6103 of the filter device 600 communicates with the recovery device 500 through the sewage pipeline 240, and the sewage pipeline 240 is provided for controlling A blowdown control valve 241 for turning on and off the blowdown pipeline 240 .

In a preferred solution of this embodiment, when the sewage control valve 241 is opened, the sewage pipeline 240 is unidirectionally connected from the filter device 600 to the recovery device 500 .

In the above solution, the blowdown control valve 241 is used to control the on-off of the blowdown pipeline 240 , so as to control the water outlet direction of the filter device 600 . When the sewage control valve 241 is closed, the water flow cannot pass through the sewage pipeline 240, so the water in the filter cavity 610 cannot flow out from the sewage outlet 6103. At this time, the filtered water can be discharged to the return water pipeline 230 through the filtered water outlet 6102.

When the sewage control valve 241 is opened, the sewage pipeline 240 is connected, and the sewage in the filter cavity 610 can flow out from the sewage outlet 6103 and be discharged into the recovery device 500 . Setting the sewage control valve 241 as a one-way conduction structure can prevent the water in the sewage pipeline 240 from flowing backwards, that is, ensure that the sewage carrying the filtered impurities is discharged from the filtering device 600 into the recovery device 500 without recycling of the filtered impurities. Device 500 returns to the case of filtering device 600 .

Further, a return water control valve 231 is provided on the return water pipeline 230 for controlling the on-off of the return water pipeline 230 . When the return water control valve 231 is opened, the water passing through the filter device 600 returns to the water storage cylinder 100 through the return water pipeline 230, so that the circulation and filtration of washing water can be realized. When the filter device 600 is cleaned and sewage needs to be discharged, the return water control valve 231 is closed to prevent water from flowing out of the filtered water outlet 6102 and ensure that the water inside the filter device 600 is discharged into the recovery device 500 together with the filtered impurities.

In this embodiment, the pipeline connecting the water storage cylinder 100 and the filter device 600 specifically includes:

The water tank drain pipe 260 is connected to the water tank 100 and the water inlet end of the circulation pump 400;

Drainage pipeline 210, one end is connected with the outlet end of circulation pump 400;

One end of the circulation pipeline 220 communicates with the drain pipeline 210 , and the other end is connected to the water inlet 6101 of the filter device 600 .

As shown in Fig. 1 and Fig. 2, the washing machine performs circulation filtering operation during the washing and rinsing process, including: turning on the circulation pump 400, and passing the water in the water storage cylinder 100 through the water storage cylinder drainage pipe 260, the drainage pipeline 210 and the circulation pipe in sequence The channel 220 is transported to the filtering device 600 for filtering, and the filtered water is returned to the water storage cylinder 100 through the return pipeline 230 .

When the washing machine executes the cycle filtering operation, the return water control valve 231 is opened to guide the return water pipeline 230, and the sewage discharge control valve 241 is closed at the same time.

The washing machine can perform a cycle filtration operation in the wash phase and in each rinse phase. Specifically, after the washing machine starts to take in water, the water level in the water storage 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. In this way, the amount of water in the water storage cylinder 100 can be prevented from being too small, and the inside of the circulation pump 400 can suck air to generate running noise.

As shown in Figure 8, after washing or rinsing is completed, and before draining, the washing machine performs self-cleaning operations, including: the return water control valve 231 is closed, the sewage control valve 241 is opened to lead to the sewage pipeline 240, and the circulation pump 400 is protected. In this state, the water in the water storage cylinder 100 is introduced into the filter device 600 , and the filter device is cleaned and discharged into the recovery device 500 ;

As shown in FIG. 9 , after the self-cleaning operation is completed, the washing machine also performs sewage discharge operation: the sewage discharge control valve 241 keeps the sewage discharge pipeline 240 in a conductive state, and the sewage carrying filtered impurities in the filter device 600 is further discharged into the recovery device 500 . When performing the sewage discharge operation, the driving mechanism 660 can be kept open to drive the filter mechanism 620 to rotate continuously, or the drive mechanism 660 can be closed to keep the filter mechanism 620 stationary in the filter cavity 610 .

In this embodiment, when the filter device 600 is installed in the washing machine, the axis of the filter mechanism 620 is set vertically, and the sewage outlet 6103 is set at the bottom of the filter cavity 610 to discharge sewage vertically downward. Since the filter impurities 501 tend to collect at the bottom of the filter cavity 610 under the action of gravity, the above arrangement is more conducive to fully discharging the filter impurities 501 .

The above-mentioned self-cleaning operation and/or sewage discharge operation is performed at least once in a complete washing program run by the washing machine. Preferably, the washing machine performs a self-cleaning operation and a sewage discharge operation before each drainage.

In a further solution of this embodiment, the drainage pipeline 210 communicates with the circulation pipeline 220 through a switching device 270, and the switching device 270 includes:

The water inlet is connected with the water outlet of the drainage pipeline 210;

The first water outlet is connected with the circulation pipeline 220;

The second water outlet is connected to the outer discharge pipeline 250 that drains water to the outside of the washing machine;

The switching mechanism controls one of the first water outlet and the second water outlet to conduct with the water inlet.

In the above solution, through the setting of the switching device 270 , both the circulation pipeline 220 and the outflow pipeline 250 are alternately connected to the drainage pipeline 210 . As shown in Fig. 1 and Fig. 8, at this time, the switching mechanism connects the water inlet and the first water outlet, that is, the drainage pipeline 210 is connected to the circulation pipeline 220, and under the action of the circulation pump 400, the water in the water storage cylinder 100 is into the filter unit 600. As shown in Figure 9, at this time, the switching mechanism connects the water inlet and the second water outlet, that is, the drainage pipeline 210 communicates with the outer drainage pipeline 250, and under the action of the circulation pump 400, the washing water in the water storage tank 100 is filled The water cylinder drain pipe 260 is drawn out, then passes through the drain pipe 210, and finally is delivered to the outer drain pipe 250 to be discharged from the washing machine.

Under the above-mentioned setting method, there is no need to set up independent circulation filter pipelines and drainage pipelines inside the washing machine, and at the same time, there is no need to separately set up drainage pumps and circulation pumps. Only by changing the connection mode of the pipelines through the operation of the switching device 270, the The same circulation pump 400 can respectively realize two functions of draining water outward and circulating and filtering washing water. This simplifies the pipe connection structure inside the washing machine, saves the space occupied by the pipes, and at the same time, only setting one circulation pump 400 can also reduce the production cost.

While the washing machine is performing sewage discharge operation, the switching device 270 can be controlled to operate to connect the drainage pipeline 210 with the external drainage pipeline 250 . While the sewage in the filter device 600 is discharged into the recovery device 500, the circulation pump 400 keeps running, and the remaining water in the water storage cylinder 100 can be discharged to the outside of the washing machine.

As shown in Figures 9 and 10, in a further solution of this embodiment, the recovery device 500 specifically includes:

The housing 510 has a recovery chamber inside;

The filter assembly 520 is arranged in the recovery chamber and divides the recovery chamber into a first chamber 531 and a second chamber 532;

The sewage pipeline 240 communicates with the first chamber 531 , the sewage carrying the filtered impurities 501 enters the first chamber 531 , and enters the second chamber 532 after being filtered by the filter assembly 520 , and the filtered impurities 501 are collected in the first chamber 531 .

Specifically, the filter assembly 520 may be a frame horizontally arranged at a certain height in the recovery chamber and a filter net laid on the frame. After the sewage carrying the filtered impurities 501 enters the first chamber 531 , the water can enter the second chamber 532 through the filter assembly 520 , and the filtered impurities 501 are blocked by the filter screen and remain on the upper surface of the filter assembly 520 . The casing 510 can be inserted/extracted and installed on the washing machine box 10, and the upper side has an opening. The user can pull the casing 510 out of the box 10 to clean the filter impurities 501 attached to the upper surface of the filter assembly 520. .

Preferably, the second chamber 532 is provided with a water outlet, which can guide the clean water entering the second chamber 532 to prevent excessive sewage discharged into the recycling device 500 from overflowing from the recycling device 500 . At the same time, when the user pulls the housing 510 out of the box body 10, he only needs to clean the filter impurities 501 on the filter assembly 520. When the filter assembly 520 is detachably connected to the housing 510, the filter assembly 520 can also be directly removed for cleaning. It is more convenient to manually pour out the water in the second chamber 532 without completely removing the housing 510 from the washing machine.

Specifically, the water outlet on the second chamber 532 can be connected with the main water inlet pipe of the washing machine through a pipeline, so that the clean water from which the impurities 501 have been filtered can be introduced into the water storage cylinder 100 for reuse. Alternatively, the water outlet is communicated with the drainage water path of the washing machine through a pipeline, and the water from which the impurities 501 have been filtered is incorporated into the drainage water flow of the washing machine to be discharged out of the washing machine together. Since the filter impurities 501 have been removed when passing through the filter assembly 520 , there is no filter impurities 501 , especially the fine lints therein are discharged with the drainage flow, thereby avoiding the problem of the fine lints being mixed into the ecological cycle.

In this embodiment, the washing machine performs circulating filtering operation during the washing and rinsing process, so that the water in the water tank 100 is circulated through the filtering device 600 for filtering, reducing the lint content in the water and improving the washing effect. After the cycle filtration operation is completed, self-cleaning operation and sewage discharge operation can also be performed to discharge the filter impurities 501 attached to the surface of the filter mechanism 620 into the recovery device 500 , so that there is no residual debris in the filter device 600 . The recycling device 500 collects the filtered impurities 501 to prevent the filtered impurities 501 from being merged into the drainage water flow and discharged from the washing machine, thereby preventing the fine lint therein from entering the ecological cycle.

Embodiment six

As shown in FIG. 11 , the difference between this embodiment and the fifth embodiment above is that the axis of the filtering mechanism 620 is vertically arranged.

Specifically, the filtered water outlet 6102 on the filter cavity 610 is arranged vertically downward, and the direction of the water inlet 6101 and the sewage outlet 6103 are opposite and parallel to the horizontal direction. Preferably, the water inlet 6101 is set higher than the sewage outlet 6103, so that the filter impurities remaining in the filter device 600 can be fully discharged, preventing the remaining filter impurities from breeding bacteria in the filter device 600 and polluting the washing water.

In this embodiment, other structures and control methods of the washing machine are the same as those in Embodiment 5, and also have similar functions and effects as Embodiment 5.

Embodiment seven

As shown in FIG. 1 and FIG. 2 , this embodiment provides a control method for the washing machine described in the fifth embodiment above, which is used to fully discharge the sewage in the filtering device 600 .

Specifically, the control method includes:

Turn on the circulation pump 400, connect the circulation filtration pipeline, and the washing machine performs circulation filtration and rinsing;

After rinsing, close the circulation pump 400;

Turn on the drive mechanism 660 to drive the filter mechanism 620 to rotate in the filter cavity 610;

When the first setting condition is reached, the circulation pump 400 is turned on, and the blowdown control valve 241 is opened to conduct the blowdown pipeline 240 at the same time;

When the second setting condition is reached, cut off the circulating filter pipeline.

Preferably, after the first set condition is reached, the driving mechanism 660 remains in an open state, driving the filter mechanism 620 to continuously rotate.

In this embodiment, the connection of the circulation filter pipeline includes: the switching device 270 leads the water outlet of the filter device 600 and the circulation pump 400 , and the return water control valve 231 is opened to connect the return water pipeline 230 . Said cutting off the circulation filter pipeline includes: the switching device 270 connects the outlet pipeline 250 and the water outlet of the circulation pump 400 .

It can be understood that the cutoff of the circulation filter pipeline can also be realized by turning off the circulation pump 400 .

In the above solution, the washing machine circulates and filters the rinsing water during the rinsing process, and the filtering device 600 and the circulating filtering pipeline are always filled with rinsing water.

After the rinsing is finished and the circulation pump 400 is turned off, the water in the drainage pipeline 210 and the circulation pipeline 220 will flow back downwards under the action of gravity, and the water in the drainage pipeline 210 can be returned to the same height as the water level in the water tank 100 at most. Above until the pipeline between the filter device 600 is filled with air. But the filtering device 600 is lower than the circulation pipeline 220 , and the water therein will not flow back through the circulation pipeline 220 . When the circulating pump 400 is turned off, the return water control valve 231 is also closed, and the sewage control valve 241 is closed at this time, and the water inside the filter device 600 remains in the filter cavity 610 and will not be discharged outside.

After the driving device 600 is turned on, it drives the filter mechanism 620 to rotate at a high speed, so that filter impurities such as lint attached to the surface are peeled off from the surface of the filter mechanism 620 under the action of centrifugal force. At this time, since the return water control valve 231 and the sewage control valve 241 are both closed, the water in the filter cavity 610 does not flow out, and the high-speed rotating filter mechanism 620 can also stir the water flow in the filter cavity 610 to form a turbulent water flow. A certain impact force is exerted on the surface of the filter mechanism 620, which can also cause the wire scraps to fall off. The lint stripped from the surface of the filter mechanism 620 melts into the water in the filter cavity 610 .

When the first setting condition is reached, the circulation pump 400 is turned on, and the sewage control valve 241 is also opened at the same time, so that the sewage pipeline 240 is conducted, and the sewage in the filter device 600 can be discharged from the sewage outlet 6103 . When the circulation pump 400 is turned on, the air in the drainage pipeline 210 and the circulation pipeline 220 is pressed into the filter device 600, so that the sewage carrying lint in the filter device 600 is completely discharged from the sewage outlet 6103 under air pressure, preventing the filter device 600 from There is residual sewage in the filter, and the cleaning effect of the filter device 600 is good. The sewage control valve 241 is opened when the circulating pump 400 is turned on, so as to ensure the pressure generated when the air passes into the filter device 600 , thereby ensuring that the sewage in the filter device 600 is fully discharged.

In order to prevent the water in the water tank 100 from entering the filter device 600 through the circulation pipeline 220 after the sewage in the filter device 600 is drained, the washing machine is preset with a second setting condition. When the second setting condition is reached, the circulation is cut off. The filter pipeline stops the water in the water storage cylinder 100 from being delivered to the filter device 600 .

In the specific scheme of this embodiment, the first setting condition may be that the circulating pump 400 is turned off for the first set time t ₁ , and the second setting condition may be that the circulating pump 400 is turned on for the second set time t ₂ .

In the above solution, the specific values of the first set time _t1 and the second set time _t2 can be obtained through a large number of experiments in advance and directly written into the control program of the washing machine.

Specifically, the value of the first set time _t1 is about the maximum time required for the water level in the drainage pipeline 210 to start to drop until it stops, and the value of the second set time _t2 is about the water level in the drainage pipeline 210. The shortest time required to rise to the top of the drain pipe 210 after the circulating pump 400 is turned on. In this way, it can be ensured that a larger amount of air can enter the pipeline when the circulation pump 400 is turned off, and at the same time, water can be effectively prevented from entering the filter device 600 after the circulation pump 400 is turned on.

In another solution of this embodiment, the height of the water level may also be used as the first setting condition and the second setting condition. Specifically, the first setting condition is: the water level in the pipeline between the circulating pump 400 and the filtering device 600 reaches the first setting value H ₁ . The second setting condition is: the water level in the pipeline between the circulating pump 400 and the filtering device 600 reaches the second setting value H ₂ . Wherein, H ₁ <H ₂ .

In this embodiment, the above-mentioned water level is specifically the height of the water level in the drainage pipeline 210 , and a water level detection device may be installed in the drainage pipeline 210 of the washing machine to realize the detection of the water level in the drainage pipeline 210 .

In the above solution, the value of the _first set value H1 is greater than and as close as possible to the highest water level of the washing machine, so as to ensure that after the circulation pump 400 is turned off, the water level in the drainage pipeline 210 can drop to the _first set value H1 .

There is generally a certain time difference between the time when the washing machine receives the signal that the water level in the drain line 210 rises to the second set value _H2 , and until the switching device 270 conducts the drain line 210 and the drain line 250 . In order to avoid response delay causing water to enter the filter device 600 after the circulating pump 400 is turned on, there needs to be a certain difference ΔH between the value of the second set value H ₂ and the water level corresponding to the top of the drainage pipeline 210 . The specific value of the difference ΔH can be obtained through a large number of experiments in advance, so as to ensure that the washing machine has enough response time to control the switching device 270 to complete the switching of the waterway after receiving the signal that the water level reaches the second set value _H2 .

In a further solution of this embodiment, the washing machine judges that the current running process is the last rinsing stage of this laundry program, then turns off the circulation pump 400 after the rinsing is completed, and turns on the circulation pump 400 after reaching the first set condition.

If the washing machine judges that the current running process is not the last rinsing stage of this laundry program, it will perform the following operations after rinsing:

Circulation pump 400 keeps running;

When the third setting condition is reached, cut off the circulating filter pipeline;

In the above solution, for the intermediate rinsing stage, since the washing machine needs to continue to run afterward, that is, there will be rinsing water circulating through the filter device 600 for filtration, at this time, the sewage carrying lint in the filter device 600 may not be drained, only It is only necessary to remove the lint adhering to the surface of the filter mechanism 620 .

After rinsing, the return water control valve 231 is closed, the sewage control valve 241 is opened, the circulation pump 400 keeps running, and the water in the water storage cylinder 100 continues to be transported to the filter device 600 under the action of the circulation pump 400, and the inside of the filter device 600 Flushing is performed, and the sewage after flushing is discharged into the sewage pipeline 240 through the sewage outlet 6103.

In this embodiment, the third setting condition can be that the end of rinsing reaches the third preset time t ₃ , the value of which is obtained through experiments in advance and written into the control program, so as to ensure that the lint adhering to the surface of the filter mechanism 620 can be removed Basically removed.

Alternatively, when the water level in the water storage tank ₁₀₀ drops to a preset value ΔH1, the circulating filter pipeline can be cut off, that is, the control switching device 270 is connected to the drainage pipeline 210 and the external drainage pipeline 250, and the circulation pump 400 continues to run, and the The remaining water in the water tub 100 is discharged from the washing machine.

In the preferred solution of this embodiment, after rinsing, the drive mechanism 660 is turned on to drive the filter mechanism 620 to rotate at a high speed in the filter cavity 610, which can stir the water in the filter cavity 610, so that the attached lint can be stirred under the centrifugal force and the turbulent water flow. Under the double action of the filter mechanism 620, it is peeled off from the surface of the filter mechanism 620, melted into the water in the filter cavity 610, and then discharged from the filter cavity 610 through the sewage outlet 6103, and the cleaning efficiency of the lint is high.

In this embodiment, the washing machine only shuts off the circulation pump 400 at the end of the last rinse, and then turns on the circulation pump 400 to completely drain the sewage in the filter device 600 . At the end of the intermediate rinsing, the circulation pump 400 remains in the running state, which prevents the circulation pump 400 from being turned on and off frequently during the operation of the washing machine, which affects its service life.

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

Turn on the circulating pump 400, the switching device 270 connects the water outlet of the circulating pump 400 and the filter device 600, the return water control valve 231 is opened, and the washing machine performs circulating filtering and washing;

After the washing is finished, the circulation pump 400 keeps running, the return water control valve 231 is closed, and the sewage control valve 241 is opened;

When the fourth set condition is met, the switching device 270 connects the water outlet of the circulation pump 400 and the discharge pipeline 250 .

Wherein, the fourth setting condition may be that the washing finishes reaching the fourth preset time t ₄ , or that the water level drop in the water tub 100 reaches the preset value ΔH ₂ .

After the washing is finished, the cycle filtering and rinsing needs to be performed in the follow-up process of the laundry program, similar to the intermediate rinsing, and the sewage in the filter device 600 does not need to be completely discharged, and the circulating pump 400 can keep running and does not need to be turned off.

In this embodiment, after washing and intermediate rinsing of the washing machine, the circulating pump 400 is controlled to keep running, and the water in the water storage cylinder 100 is sent to the filter device 600 for rinsing, and the rinsed sewage is discharged from the sewage outlet 6103 of the filter device 600 . After the last rinsing, first turn off the circulation pump 400, wait for the air to enter the pipeline, then turn on the circulation pump 400 again, and press the air in the pipeline into the filter device 600, so as to completely drain the sewage and ensure that the washing machine stops running There is no sewage residue in the post-filtering device 600, which can effectively prevent the growth of bacteria. At the same time, the washing machine only performs the operation of first turning off the circulation pump 400 and then turning it on again after the last rinsing, which reduces unnecessary opening and closing operations of the circulation pump 400 and prolongs the service life of the circulation pump 400 .

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes. In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (10)

1. A washing machine, characterized by 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;

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;

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.

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;

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

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;

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

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;

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.

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;

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.

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