CN117248358A

CN117248358A - Washing machine and control method thereof

Info

Publication number: CN117248358A
Application number: CN202311014365.5A
Authority: CN
Inventors: 吕艳芬; 许升; 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: 2023-12-19
Also published as: CN115613305A

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 inlet end and the water outlet end of the water containing barrel are respectively communicated with the water containing barrel, and a circulating pump is arranged on the water containing barrel; the filtering device is arranged on the circulating filtering pipeline and is provided with a drain outlet for discharging filtered impurities outwards; the recovery device is communicated with the sewage outlet of the filtering device through a sewage pipeline and is used for collecting discharged filtered impurities; the sewage control valve is arranged on the sewage pipeline and used for controlling the on-off of the sewage pipeline. In the washing machine, the water in the water containing cylinder can be circulated through the filtering device under the drive of the circulating pump to be filtered, so that the content of thread scraps in the water is reduced, the washing effect is improved, the filtered impurities cleaned from the filtering device are discharged into the recovery device and cannot be directly discharged along with the drainage of the washing machine, the possibility that fine thread scraps enter the ecological cycle along with the water flow is reduced, and the influence on the ecological environment and the human health is reduced.

Description

Washing machine and control method thereof

The present application is a divisional application directed to chinese patent application 202110789651.3.

The original application date: 2021, 07, 13

Original application number: 202110789651.3

The invention creates the name: 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 clothes by the washing machine, the clothes can generate filings to fall off and be mixed into 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, and the washing effect of the laundry is likely to be affected. For this, a filter for filtering lint is installed in the existing washing machine, and washing water is circulated through the filter during washing 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 for filtering filings and impurities in the washing water. However, after the washing machine is used for a long time, the filter is filled with thread scraps and sundries, the filtering effect of the filter is affected, the drain valve/drain pump is blocked, bacteria are very easy to breed, the bacteria are required to be cleaned in time, otherwise, the pollution of washing water is caused, secondary pollution is caused to clothes, and the health of a user is affected. Most washing machines require manual cleaning by removing the filter by a user, and are inconvenient to operate.

On the other hand, part of the filter is considered to block the filtering holes on the filter, and the aperture of the filtering holes is usually larger, but the fine filings on some clothes cannot be filtered, so that the filings are stuck on the clothes, and the user experience is affected. Meanwhile, part of the filings can be discharged along with water flow, enter ecological circulation and finally influence human health.

In view of the above problems, there has been proposed a filter capable of self-cleaning, in which lint and the like in the filter are removed by flushing or vibrating, and then the lint and the like are collected together with flushing water into a drain line of a washing machine, and discharged from the washing machine. However, in the above proposal, the filings after washing directly enter the drainage water flow of the washing machine, and still enter the ecological cycle, which threatens the health of human body.

In view of this, the present invention has been made.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a washing machine and a control method thereof, wherein a filtering device in the washing machine can filter water in a water containing cylinder, so that the content of filings in the water is reduced, the washing effect is improved, the filtering device is connected with a recovery device through a sewage discharge pipeline, and filtered impurities discharged by the filtering device can be collected, so that the filtered impurities cleaned by the filtering device can not be directly discharged along with the drainage of the washing machine, the possibility that fine filings enter the ecological cycle along with water flow is reduced, and the influence on the ecological environment and human health is reduced.

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

a washing machine, comprising:

a water containing cylinder is arranged on the water tank,

the water inlet end and the water outlet end of the circulating filter pipeline are respectively communicated with the water containing cylinder, and a circulating pump is arranged on the circulating filter pipeline;

the filtering device is arranged on the circulating filtering pipeline and is provided with a drain outlet for discharging filtered impurities outwards;

the recovery device is communicated with the sewage outlet of the filtering device through a sewage pipeline and is used for collecting discharged filtered impurities;

the sewage control valve is arranged on the sewage pipeline and used for controlling the on-off of the sewage pipeline.

Further, the recovery device includes:

a housing having a recovery chamber therein;

the filter assembly is arranged in the recovery cavity and divides the recovery cavity into a first cavity and a second cavity;

the sewage pipeline is communicated with the first chamber, sewage carrying filtered impurities enters the first chamber, and enters the second chamber after being filtered by the filtering component, and the filtered impurities are collected in the first chamber.

Further, a tee joint structure is arranged between the water outlet end of the circulating pump and the water outlet end of the circulating filter pipeline, and the tee joint structure is connected with an external drainage pipeline for draining water to the outside of the washing machine;

The filtering device is arranged between the tee joint structure and the water outlet end of the circulating filtering pipeline.

Further, the three-way structure comprises a switching mechanism for controlling the filtering device and the discharge pipeline to be selectively communicated with the water outlet end of the circulating pump.

Further, a backwater control valve is arranged between the filtering device and the water outlet end of the circulating filtering pipeline and is used for controlling the on-off of the circulating filtering pipeline.

Further, the filtering device includes:

the filter cavity is provided with a water inlet, a filtered water outlet and a sewage outlet, and the water inlet and the filtered water outlet are connected to the circulating filter pipeline;

the filtering mechanism is rotatably arranged in the filtering cavity;

the driving mechanism drives the filtering mechanism to rotate in the filtering cavity;

preferably, the direction of the filtered water outlet is parallel to the axial direction of the filtering mechanism;

more preferably, the axis of the filtering mechanism is horizontally arranged, the direction of the filtered water outlet is in a horizontal direction, the water inlet is vertically upwards arranged, and the sewage outlet is vertically downwards arranged;

or, the axis of the filtering mechanism is vertically arranged, the filtered water outlet is vertically downwards arranged, and the water inlet and the sewage outlet are opposite in direction and are parallel to the horizontal direction.

Another object of the present invention is to provide a control method of the above-mentioned washing machine, performing a drain operation, comprising: the sewage control valve is opened to conduct a sewage pipeline, and sewage carrying filtered impurities in the filtering device is discharged into the recovery device.

Further, a loop filtering operation is performed: the sewage control valve is closed, the circulating pump is started, water in the water containing cylinder is led into the circulating filtering pipeline, filtered impurities are removed through the filtering device, and the water returns to the water containing cylinder again.

Further, a backwater control valve is arranged between the filtering device and the water outlet end of the circulating filtering pipeline and is used for controlling the on-off of the circulating filtering pipeline;

the control method further includes performing a self-cleaning operation, including: the backwater control valve is closed, the sewage control valve is opened to conduct a sewage pipeline, the circulating pump is opened, water in the water containing cylinder is led into the filtering device, and the water is discharged into the recovery device after the filtering device is cleaned;

preferably, the filter device comprises a filter cavity, a filter mechanism and a drive mechanism, the self-cleaning operation further comprising: the driving mechanism is controlled to drive the filtering mechanism to rotate in the filtering cavity.

Further, the self-cleaning operation and/or the drain operation is performed at least once in one complete laundry process.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.

In the washing machine, the circulating pump drives the water in the water containing cylinder to flow along the circulating filtering pipeline, and the thread scraps in the water can be removed when the water passes through the filtering device, so that the thread scraps content in the water containing cylinder is reduced. The washing machine is internally provided with a recovery device for collecting filtering impurities discharged by the filtering device, sewage carrying the filtering impurities after cleaning the filtering device can be discharged into the recovery device through a sewage discharge pipeline, and the sewage is filtered by a filtering component in the recovery device to collect the filtering impurities in the first chamber. The filtered impurities can not be directly discharged along with the drainage of the washing machine, namely, can not enter the ecological cycle along with the drainage water flow, so that the influence on the ecological environment and the human health caused by the fact that fine thread scraps enter the ecological cycle is reduced.

In the washing machine, the filtering device is provided with the two water outlets of the filtering water outlet and the sewage outlet, and the two water outlets are respectively communicated with the water containing cylinder and the recovery device through pipelines and used for discharging filtered water and sewage carrying filtering impurities, and the control valves are respectively arranged to control the filtering device to be communicated with the water containing cylinder or the recovery device, so that the water entering the filtering device can be ensured to flow out from the corresponding water outlets, and the filtering device is controlled to execute the cyclic filtering operation or the self-cleaning operation/the sewage discharging operation.

In the washing machine, the three-way structure for connecting the discharge pipeline is arranged between the circulating pump and the filtering device on the circulating filtering pipeline, one of the filtering device and the discharge pipeline is controlled to be communicated with the circulating pump by the switching mechanism in the three-way structure, two mutually independent waterways are not required to be arranged in the washing machine for circulating filtering and draining respectively, and two functions of circulating filtering washing water and discharging water outwards can be realized through one circulating pump, so that the waterway structure inside the washing machine is simplified, and the space is saved.

In the washing machine, the filtering mechanism in the filtering device can rotate in the filtering cavity under the drive of the driving mechanism, the filtered impurities are attached to the outer surface of the filtering mechanism, and can be peeled off from the filtering mechanism under the centrifugal force generated by rotation and the impact force of the water flow stirred in the filtering cavity, so that the self-cleaning function of the filtering device is realized, and the cleaning efficiency of the filtered impurities is high.

The following describes the 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 and 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. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

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

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

fig. 3 is a schematic view of a washing machine performing a self-cleaning operation according to a first embodiment of the present invention;

fig. 4 is a schematic view illustrating a washing machine performing a drain operation in accordance with an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the present invention at B in FIG. 4;

fig. 6 is a schematic structural view of a washing machine in accordance with a second embodiment of the present invention;

FIG. 7 is a schematic view of a filter device according to an embodiment of the present invention;

FIG. 8 is a schematic view of the section C-C of FIG. 7 in accordance with the present invention

FIG. 9 is a schematic view showing a cleaning filter device of the washing machine after the intermediate rinsing is finished in accordance with the fourth embodiment of the present invention;

FIG. 10 is a schematic view showing a first stage of cleaning the filtering device after the last rinsing of the washing machine in accordance with the fourth embodiment of the present invention;

FIG. 11 is a schematic diagram showing a second stage of cleaning the filter device after the last rinsing of the washing machine in accordance with the fourth embodiment of the present invention;

fig. 12 is a schematic view showing a third stage of cleaning the filtering device after the last rinsing of the washing machine in accordance with the fourth embodiment of the present invention.

In the figure: 100. a water holding cylinder; 110. a window pad; 210. a drainage pipeline; 220. a circulation line; 230. a water return line; 231. a backwater control valve; 240. a sewage discharge pipeline; 241. a blowdown control valve; 250. an outer line; 260. a water drum drain pipe; 270. a switching device; 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 filtering device; 601. a first limiting surface; 602. the 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 filter cavity; 6101. a water inlet; 6102. a filtered water outlet; 6103. a sewage outlet; 6104. a mounting port; 611. a seal support; 612. a sleeve portion; 613. reinforcing ribs; 620. a filtering mechanism; 621. a water outlet joint; 622. a rotation support part; 623. a filter screen supporting part; 624. a motor mounting portion; 625. a filter screen; 631. a first bearing; 632. a second bearing; 641. a first seal; 642. a second seal; 643. a third seal; 650. a filter cavity flange; 651. a connection part; 652. a plug-in part; 653. a through hole; 660. a driving mechanism.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1 to 5, the washing machine according to the present embodiment includes:

the water containing cartridge 100 is provided with a water inlet,

the water inlet end and the water outlet end of the circulating filter pipeline are respectively communicated with the water containing cylinder 100, and a circulating pump 400 is arranged on the circulating filter pipeline;

A filter 600 provided on the circulation filter pipe and having a drain 6103 for discharging the filtered impurities 501;

the recovery device 500 is communicated with a drain outlet 6103 of the filtering device 600 through a drain pipeline 240 and is used for collecting the discharged filtered impurities 501;

the drain control valve 241 is disposed on the drain pipe 240 and is used for controlling the on-off of the drain pipe 240.

In this embodiment, the water containing tube 100 is communicated with the circulating filter pipeline to form a circulating filter loop, and the circulating pump 400 drives the washing water in the water containing tube 100 to enter the circulating filter pipeline, and the filtering device 600 removes the filings and other filtered impurities 501 therein, and then returns to the water containing tube 100 again. In the laundry washing process, the circulating pump 400 drives the washing water to continuously circulate through the filtering device 600, reducing the lint content in the washing water, and thus improving the laundry washing effect.

The drain 6103 is arranged on the filter device 600, and the filtered impurities 501 remained in the filter device 600 after filtration can be discharged from the drain 6103, so that the filter device 600 is not required to be taken out by a user for manual cleaning, and the use is more convenient. The recovery device 500 is arranged on the washing machine, the drain outlet 6103 is communicated with the recovery device 500 through the drain pipeline 240, and the filtered impurities 501 are discharged into the recovery device 500 through the drain pipeline 240 and are collected without entering the drainage water flow, and are discharged out of the washing machine along with the drainage water flow. By the above mode, fine thread scraps in the filtered impurities 501 are prevented from being discharged along with water flow and enter the ecological cycle, so that harm is brought to ecological environment and human health.

The drain pipeline 240 is further provided with a drain control valve 241, when the washing water circularly flows in the circulating filtration loop to be filtered, the drain control valve 241 is closed to disconnect the communication between the drain outlet 6103 and the recovery device 500, so as to ensure that the washing water continuously circularly flows along the circulating filtration pipeline, that is, the washing water entering the filtration device 600 is prevented from flowing out of the drain outlet 6103 into the recovery device 500.

In a further aspect of this embodiment, the recovery device 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 drain pipeline 240 is communicated with the first chamber 531, sewage carrying filtered impurities 501 enters the first chamber 531, filtered by the filter component 520 and enters the second chamber 532, and the filtered impurities 501 are collected in the first chamber 531.

Specifically, the filter assembly 520 may be a frame horizontally disposed at a height within the recovery chamber and a screen 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 housing 510 is installed to be inserted/withdrawn into/from the washing machine, and has an opening at an upper side thereof, so that a user can withdraw the housing 510 from the washing machine, thereby cleaning the filtered foreign matter 501 attached to an upper surface of the filter assembly 520.

Preferably, the second chamber 532 may be in communication with a main water inlet pipe of the washing machine through a pipe so that the clean water filtered to filter out the filtered impurities 501 may be introduced into the water containing cartridge 100 for reuse. Alternatively, the second chamber 532 is connected to a drain water path of the washing machine through a pipe, and the water filtered to remove the filtered impurities 501 is combined with the drain water flow of the washing machine and discharged out of the washing machine together. Since the filtering impurities 501 are removed while passing through the filtering assembly 520, there is no filtering impurities 501, especially, fine lint therein discharged with the drain water flow, thereby avoiding the problem of fine lint mixing into the ecological cycle.

In this embodiment, a three-way structure is disposed between the water outlet end of the circulation pump 400 and the water outlet end of the circulation filter pipe, and the three-way structure is connected to the drain pipe 250 for draining water to the outside of the washing machine.

The filtering device 600 is disposed between the tee structure and the water outlet end of the circulating filter circuit.

Further, the three-way structure is a switching device 270 for controlling the filtering device 600 and the discharge pipeline 250 to be selectively connected with the water outlet of the circulation pump 400, and comprises:

the water inlet is communicated with the water outlet end of the circulating pump 400;

a first water outlet communicating with the filtering device 600;

A second water outlet communicated with the discharge pipeline 250;

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

Specifically, the circulating filter pipeline comprises:

a water drum drain pipe 260 connecting the water drum 100 with the water inlet end of the circulation pump 400;

a drain pipe 210 having one end connected to a water outlet end of the circulation pump 400 and the other end connected to a water inlet of the switching device 270;

the circulating pipeline 220, one end of which is connected with the first water outlet of the switching device 270, and the other end of which is connected with the water inlet 6101 of the filtering device 600;

the water return pipe 230 has one end connected to the filtered water outlet 6102 of the filter device 600 and the other end connected to the water container 100, and conveys the filtered water to the water container 100.

The water inlet end of the outer discharge pipe 250 is connected to the second water outlet of the switching device 270, and the water outlet end extends to the outside of the washing machine.

In detail, the filtering device 600 is disposed above the water container 100, the circulation pipeline 220 and the water return pipeline 230 are also disposed above the water container 100, and the water outlet end of the water return pipeline 230 is connected to the window pad 110, so as to communicate with the water container 100. The circulation pump 400 is disposed below the water tub 100, and is communicated with the water tub 100 through the water tub drain pipe 260, and the drain pipe 210 transfers the washing water from bottom to top under the action of the circulation pump 400.

In the above-described embodiment, the switching device 270 is provided to selectively connect both the filtering device 600 and the discharge pipe 250 to the circulation pump 400. As shown in fig. 1, at this time, the switching mechanism is connected to the water inlet and the first water outlet, that is, the circulation pump 400 is connected to the filtering device 600, and the washing water flows along the circulation filtering pipeline under the action of the circulation pump 400, and is filtered by the filtering device 600. As shown in fig. 4, the switching mechanism is connected to the water inlet and the second water outlet, that is, the circulation pump 400 is connected to the drain pipe 250, and the washing water in the water container 100 is pumped out through the water container drain pipe 260 under the action of the circulation pump 400, and then is finally delivered to the drain pipe 250 to be drained out of the washing machine through the drain pipe 210.

Under the above arrangement, two mutually independent waterways are not required to be arranged in the washing machine for circulating filtration and discharge of washing water respectively, and meanwhile, a drainage pump and a circulating pump are not required to be arranged respectively, and two functions of outwards draining and circulating filtration of washing water can be respectively realized through the same circulating pump 400 only by changing the communication mode between pipelines through the action of the switching device 270. So simplified the inside pipeline connection structure of washing machine, saved the space that the pipeline took, only set up a circulating pump 400 simultaneously still can reduce manufacturing cost.

In a further aspect of this embodiment, a water return control valve 231 is disposed between the filtering device 600 and the water outlet end of the circulating filter pipeline, that is, the water return pipeline 230, for controlling the on-off of the water return pipeline 230, so as to control the on-off of the circulating filter pipeline.

In the above-mentioned scheme, when the washing water in the water containing tub 100 is circulated and filtered, the washing water sequentially passes through the water containing tub drain pipe 260, the drain pipe 210, the circulation pipe 220, and the filtering device 600 by the circulation pump 400, and finally returns to the water containing tub 100 through the return pipe 230. When the filtered impurities 501 remaining in the filtering apparatus 600 need to be discharged, the return water control valve 231 is closed to disconnect the communication between the filtered water outlet 6102 and the water containing tube 100, and the washing water cannot flow out from the filtered water outlet 6102. At the same time, the drain control valve 241 opens the drain pipe 240, so that the washing water entering the filtering device 600 can be guaranteed to flow out from the drain 6103, and the filtered impurities 501 are fully carried out from the filtering device 600.

In this embodiment, the filtering apparatus 600 includes:

the filter cavity 610 is provided with a water inlet 6101, a filtered water outlet 6102 and a sewage drain 6103, and the water inlet 6101 and the filtered water outlet 6102 are connected with the circulating filter pipeline;

A filter mechanism 620 rotatably disposed within the filter cavity 610;

the drive mechanism 660 drives the filter mechanism 620 to rotate within the filter cavity 610.

Specifically, as shown in fig. 7 and 8, the filter mechanism 620 includes a filter screen bracket and a filter screen 625, the filter screen bracket specifically including:

a filter screen support portion 623 located inside the filter chamber 610, the filter screen 625 covering the surface of the filter screen support portion 623, thereby dividing the inside of the filter chamber 610 into an outer chamber and an inner chamber;

a water outlet connector 621 in communication with the internal chamber.

When the circulating filtration of the washing water is performed, the washing water to be filtered is conveyed to the filtering device 600, enters the outer cavity of the filtering cavity 610 from the water inlet 6101, and when the washing water passes through the filtering mechanism 620, the filtering impurities 501 in the washing water are blocked by the filter screen 625 and attached to the surface of the filter screen 625, so that the washing water entering the inner cavity does not contain the filtering impurities 501 such as thread scraps. The filtered clean washing water finally flows out of the filter cavity 610 through the water outlet connector 621 and the filtered water outlet 6102.

When the filter device 600 needs to be cleaned, the filter mechanism 620 is driven to rotate in the filter cavity 610 by the driving mechanism 660, such as a motor, so as to agitate the water remained in the filter cavity 610, and the filtered impurities 501 on the surface of the filter screen 625 are peeled off from the filter screen 625 under the action of centrifugal force and the turbulent water flow, are mixed into the water in the filter cavity 610, are discharged out of the filter cavity 610 through the drain 6103, and are collected by the recovery device 500.

In a preferred embodiment of the present embodiment, the filtered water outlet 6102 is oriented parallel to the axial direction of the filter mechanism 620.

Specifically, the water outlet connector 621 is disposed at the left end of the filter screen support portion 623, the axis of which coincides with the axis of the filter mechanism 620, and the water outlet connector 621 is rotatably and sealingly connected to the filtered water outlet 6102.

In this embodiment, the axis of the filtering mechanism 620 is horizontally disposed, the direction of the filtered water outlet 6102 is the horizontal direction, the water inlet 6101 is vertically disposed upward, and the sewage drain 6103 is vertically disposed downward. The washing water to be filtered and the washing water for washing the filtering mechanism 620 all enter from the top of the filtering cavity 610, and the water flow can smoothly flow out from the filtering water outlet 6102 or the sewage outlet 6103 under the action of self gravity. The drain 6103 is disposed at the bottom of the filter cavity 610, and discharges the sewage carrying the filtered impurities 501 downward, so that the filtered impurities 501 tend to collect at the bottom of the filter cavity 610 after being stripped from the filter screen 625, which is beneficial to fully discharging the filtered impurities 501.

The embodiment also provides a control method of the washing machine, wherein the circulating filtering operation, the self-cleaning operation and the pollution discharge operation are respectively executed in the process of running the washing program of the washing machine.

Specifically, as shown in fig. 1 and 2, the loop filtering operation includes: the pollution discharge control valve 241 is closed, and the backwater control valve 231 is opened to conduct the backwater pipeline 230; the circulation pump 400 is turned on to introduce the water in the water tub 100 into the circulation filtering line, remove the filtered impurities through the filtering device 600, and return to the water tub 100 again.

As shown in fig. 3, the self-cleaning operation includes: the backwater control valve 231 is closed, the sewage control valve 241 is opened to conduct the sewage pipeline 240, the circulating pump 400 is opened, water in the water containing cylinder 100 is led into the filtering device 600, and the filtering device 600 is cleaned and then discharged into the recovery device 500. Further comprises: the control drive mechanism 660 rotates the filter mechanism 620 within the filter cavity 610.

As shown in fig. 4, the blowdown operation includes: the drain control valve 241 opens the conductive drain line 240 to drain the sewage carrying the filtered impurities 501 in the filtering apparatus 600 into the recovery apparatus 500. When the blowdown operation is performed, the driving mechanism 660 can be controlled to be started to drive the filter mechanism 620 to rotate, or the driving mechanism 660 can be not started, so that the filter mechanism 620 can be kept stationary in the filter cavity 610.

In this embodiment, the cyclic filtering operation is performed in both the washing phase and one to more rinsing phases of the laundry process, and the self-cleaning operation and/or the blowdown operation is performed at least once in one complete laundry process. Preferably, the self-cleaning operation and the drain operation are performed at the end of the washing stage and each rinsing stage.

Specifically, the circulation pump 400 is turned on after the washing stage and each rinsing stage start to be supplied with water for a certain period of time, and the circulation filtering operation starts to be performed. The cyclic filtering operation is continuously performed until the washing or rinsing stage is nearly completed, and when the drain is about to be performed, the return water control valve 231 is closed, the drain control valve 241 is opened, and the driving mechanism 660 is started to perform the self-cleaning operation. After the self-cleaning operation is continued for a certain period of time, the washing machine performs the blowdown operation again.

In detail, after the washing machine starts to feed water, the water level in the water tub 100 is detected, and when the water level reaches a preset level, the circulation pump 400 is turned on, and the circulation filtering operation starts to be performed. This prevents the water in the water tub 100 from being excessively reduced, and prevents the air sucked into the circulation pump 400 from generating operational noise. The washing machine performs the drain operation and simultaneously controls the switching device 270 to operate, the drain pipe 210 and the drain pipe 250 are connected, and the circulation pump 400 continuously operates to drain the remaining water in the water tub 100.

In this embodiment, the filtering device 600 is disposed on the washing machine, so that water in the water drum 100 can be circularly filtered during the operation of the washing machine, the content of filings in water is reduced, and the washing effect is improved. The filtering apparatus 600 can be self-cleaned, thereby discharging the filtered impurities 501 remaining inside the filtering apparatus 600 without the need for a user to detach the filtering apparatus 600 from the washing machine for manual cleaning, and the use is convenient. The recovery device 500 is communicated with the filtering device 600, filtering impurities 501 discharged by the filtering device 600 can be collected, the filtering impurities 501 are prevented from being mixed into drainage water flow of the washing machine to be directly discharged out of the washing machine, and then the drainage water flow enters the ecological cycle, so that harm to ecological environment and human health caused by fine thread scraps in the filtering impurities 501 is avoided.

Example two

As shown in fig. 6, this embodiment differs from the first embodiment in that: the axis of the filtering mechanism is arranged vertically.

Specifically, the filtered water outlet 6102 of the filter 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 higher than the sewage outlet 6103, so as to fully discharge the filtered impurities remaining in the filter 600, thereby avoiding bacteria breeding in the filter 600 and polluting the washing water.

In this embodiment, other structures and control methods of the washing machine are the same as those of the first embodiment, and have similar effects to those of the first embodiment.

Example III

As shown in fig. 7 and 8, the present embodiment provides a filtering device 600 applied to the first or second embodiment.

Specifically, the filtering apparatus 600 includes:

the filter cavity 610 is provided with a water inlet 6101 and a filtered water outlet 6102, and the outer periphery of the filtered water outlet 6102 extends to the outside of the filter cavity 610 to form a sealing support 611;

the filtering mechanism 620 is rotatably arranged inside the filtering cavity 610, one end of the filtering mechanism is provided with a water outlet connector 621 inserted into the sealing support part 611, and the water outlet connector 621 is rotatably and hermetically connected with the sealing support part 611;

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

the first sealing member 641 is provided at a side of the first bearing 631 facing the inside of the filter chamber 610, and seals a gap between the water outlet joint 621 and the seal support 611.

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

a filter screen support portion 623 located inside the filter chamber 610, the filter screen 625 covering the surface of the filter screen support portion 623;

a water outlet joint 621 provided at the left end of the filter screen supporting portion 623 and rotatably inserted in the seal supporting portion 611;

the rotation support part 622 is disposed at the right end of the filter screen support part 623 and rotatably connected to the filter chamber 610.

In the above-mentioned scheme, the first bearing 631 is disposed between the water outlet connector 621 and the seal supporting portion 611 to support the water outlet connector 621, so that the water outlet connector 621 rotates in the seal supporting portion 611 more smoothly, and meanwhile, the structure is stable, and the stable rotation of the filter mechanism 620 in the filter cavity 610 can be ensured. The first sealing piece 641 is arranged on the right side of the first bearing 631, so that the washing water in the filter cavity 610 cannot enter the gap between the water outlet connector 621 and the sealing support 611, the first bearing 631 is prevented from being contacted with water, the failure of the first bearing 631 is avoided, and the action effect of the first bearing 631 is ensured. Meanwhile, the first seal 641 also prevents unfiltered wash water from flowing out of the filtered water outlet 6102 through the seal support 611, affecting the cleaning efficiency of the filings by the filter device 600.

In the embodiment of the present embodiment, the first sealing element 641 is sleeved on the water outlet connector 621, the inner wall of the first sealing element 641 is in sealing connection with the outer wall of the water outlet connector 621, and the outer wall of the first sealing element 641 is in rotatable sealing connection with the inner wall of the sealing support portion 611.

In a further aspect of this embodiment, the filtering apparatus 600 further includes a second seal 642, where the second seal 642 is disposed on a side of the first bearing 631 facing away from the filter cavity 610, and seals a gap between the water outlet connector 621 and the seal supporting portion 611.

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

In the above-described aspect, the second seal 642 is further provided at the left side of the first bearing 631, and water flowing out through the water outlet connector 621 may be blocked by the second seal 642 from contacting the first bearing 631. The first bearing 631 is located between the first sealing element 641 and the second sealing element 642, so that the installation environment of the first bearing 631 is guaranteed to be free of water to the greatest extent, the first bearing 631 is prevented from rusting when meeting water, and the smoothness of rotation of the filtering mechanism 620 is prevented from being affected.

In a further aspect of this embodiment, the inner wall of the seal supporting 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 reduced inner diameters, are sequentially formed from one end of the seal supporting portion 611 to the outside of the filter cavity 610.

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

In the above-mentioned scheme, a plurality of vertical annular limiting surfaces are formed on the inner wall of the sealing support portion 611 with a stepped structure and respectively abut against the 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 first sealing element 641, the first bearing 631 and the second sealing element 642 in the axial direction of the water outlet connector 621 can be limited, and the loosening of the matching structure between the water outlet connector 621 and the sealing support portion 611 in the rotation process of the filtering mechanism 620 is prevented.

In a preferred embodiment of the present embodiment, an outer diameter of one end of the water outlet connector 621, which is close to the outside of the filter cavity 610, is smaller than an outer diameter of the other end, and a fourth limiting surface 604 having an annular structure and being perpendicular to an axis of the water outlet connector 621 is formed on an outer wall of the water outlet connector 621. The surface of the first bearing 631 facing the inner side 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 smaller than that of the right end, a fourth limiting surface 604 facing to the left is formed at the abrupt outer diameter position and is abutted against the right side surface of the first bearing 631. Therefore, the two sides of the first bearing 631 are provided with limiting structures, and the structure is more stable.

In this embodiment, the end of the seal supporting portion 611 away from the filter cavity 610, that is, the left end of the seal supporting portion 611 is connected to the filter cavity flange 650, and a through hole 653 communicating with the water outlet connector 621 is formed in the middle of the filter cavity flange 650. The outer periphery of the through-hole 653 extends away from the seal support portion 611 to form a connection portion 651.

Preferably, the surface of the filter chamber flange 650 facing the side of the seal support portion 611 has a convex insertion portion 652, and the insertion portion 652 is inserted into an opening at the left end of the seal support portion 611.

In the above-described aspect, the left end of the seal supporting portion 611 is connected to the filter chamber flange 650, and a connection portion 651 is formed on the filter chamber flange 650, the outer diameter of the connection portion 651 is smaller than the outer diameter of the seal supporting 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, the connection portion 651 on the filter cavity flange 650 is connected with the pipeline, so that the guiding-out of the washing water without the thread scraps after filtering is realized, and compared with the mode that the pipeline is directly connected to the left end of the sealing support portion 611, the installation is easier.

The right side of the filter cavity flange 650 is provided with a plug-in portion 652 which is inserted into the left end opening of the seal supporting portion 611, so that the filter cavity flange 650 can be positioned conveniently when assembled with the seal supporting portion 611. The outer circumferences of the filter cavity flange 650 and the seal supporting portion 611 are respectively provided with a plurality of fixing portions through which screws pass to fix the filter cavity flange 650 and the seal supporting portion 611.

In a further aspect of this embodiment, the rotation support portion 622 at the right end of the filtering mechanism 620 extends along the rotation axis thereof to the outside of the filtering cavity 610, and the filtering cavity 610 is provided with a mounting opening 6104 through which the rotation support portion 622 passes. The rotation support 622 is rotatably and sealingly connected to the mounting opening 6104.

In this embodiment, since the filter mechanism 620 is driven to rotate by the driving mechanism, the driving mechanism is disposed outside the filter chamber 610 to avoid contact with the washing water. For this, a rotation support portion 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 portion 622 for connection with a driving mechanism such as a motor.

Further, the outer circumference of the mounting opening 6104 extends outward of the filter cavity 610 along the axis of the rotation support 622 to form a sleeve portion 612, and the rotation support 622 is sleeved with a third seal 643. The inner wall of the third seal 643 is sealingly connected to the outer wall of the rotation support 622, and the outer wall of the third seal 643 is rotatably sealingly connected to the 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 on a side of the third seal 643 facing the outside of the filter cavity 610.

In the above-mentioned aspect, the third seal 643 prevents water in the filter cavity 610 from leaking from the mounting hole 6104, and the second bearing 632 can support the rotation support portion 622, so as to ensure smoother relative rotation between the rotation support portion 622 and the sleeve portion 612. The second bearing 632 is disposed to the right of the third seal 643 and does not contact the water within the filter cavity 610 to avoid failure.

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

The outer diameter of one end of the rotation support portion 622 near the outside of the filter 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 rotation support portion 622 is formed on the outer wall of the rotation support portion 622. The surface of the second bearing 632 facing the inner side of the filter cavity 610 abuts against the sixth limiting surface 606.

In the above-described embodiment, 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 stopper surface 605 is formed at the abrupt change of the inner diameter so as to be directed to the left side and to abut against the right side surface of the third seal 643. The outer diameter of the right end of the rotation support portion 622 is smaller than that of the left end, and a sixth limiting surface 606 facing to the right is formed at an abrupt change of the outer diameter thereof and abuts against the left 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 is structurally stable.

In this embodiment, the first seal 641, the second seal 642, and the third seal 643 are oil seals, and the right wall of the filter chamber 610 is disposed separately from the peripheral wall thereof. The filter mechanism 620, the first seal 641, the second seal 642 and the first bearing 631 at the left end thereof are integrally mounted inside the filter cavity 610, the third seal 643 and the second bearing 632 are mounted at the right end thereof, and finally the right wall of the filter cavity 610 is buckled with the peripheral side wall thereof.

In this embodiment, the cross-sectional area of the middle area of the filter screen supporting portion 623 is constant, and both the left and right ends thereof have tapered structures, so that the local surface of the filter screen 625 is inclined, which is beneficial to the falling off of attached thread scraps.

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

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

In the above-described embodiment, the water inlet 6101 is located as far from the water outlet 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 filter cavity 610, which is beneficial to fully discharging sewage after the filter device 600 is cleaned in the filter cavity 610.

In a further aspect of this embodiment, the outer wall of the seal supporting portion 611 is provided with a reinforcing rib 613 extending in the radial direction of the seal supporting portion 611, and the reinforcing rib 613 is connected to the surface of the filter cavity 610 where the filtered water outlet 6102 is located.

Since the seal supporting portion 611 extends from the left side end face of the filter chamber 610 by a certain length, the provision of the reinforcing ribs 613 supports the peripheral side wall thereof from the outside, ensuring the strength of the seal supporting portion 611.

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

The two ends of the filtering mechanism 620 are respectively provided with a first bearing 631 and a second bearing 632 for supporting, so that the filtering mechanism 620 is ensured to smoothly and stably rotate in the filtering cavity 610. At the same time, by the provision 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.

Example IV

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

Specifically, the control method comprises the following steps:

starting the circulating pump 400, conducting a circulating filtering pipeline, and performing circulating filtering rinsing on the washing machine;

the rinsing is finished, and the circulation pump 400 is turned off;

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

when the first set condition is reached, the circulating pump 400 is started, and meanwhile, the pollution discharge control valve 241 is opened to conduct the pollution discharge pipeline 240;

and when the second set condition is reached, cutting off the circulating filter pipeline.

Preferably, after the first setting condition is reached, the driving mechanism 660 is kept in an opened state, 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 water outlet ends of the filtering device 600 and the circulation pump 400, and opens the return water control valve 231 to conduct the return water pipeline 230. The cutting-off circulating filter pipeline comprises: the switching device 270 conducts the discharge line 250 and the water outlet of the circulation pump 400.

It will be appreciated that the shut-off of the recirculation filter line may also be accomplished by shutting off the recirculation pump 400.

In the above-described scheme, the washing machine performs the circulation filtration of the rinse water during the rinsing process, and the filter device 600 and the circulation filtration line are always filled with the rinse water.

As shown in fig. 10, after the circulation pump 400 is turned off after the rinsing is completed, water in the drain pipe 210 and the circulation pipe 220 flows back downward under the action of gravity, and at most, the water level in the drain pipe 210 is flush with the water level in the water containing drum 100, and the pipes above the water level until the filtering device 600 are filled with air. But the filtering device 600 is lower than the circulation line 220, and water therein does not flow back through the circulation line 220. The circulation pump 400 is closed, the backwater control valve 231 is also closed, and at this time, the drain control valve 241 is closed, so that water in the filter device 600 remains in the filter cavity 610 and is not discharged.

As shown in fig. 11, after the driving mechanism 660 is turned on, the filtering mechanism 620 is driven to rotate at a high speed, so that the filtered impurities such as the filings attached to the surface are peeled off from the surface of the filtering mechanism 620 under the centrifugal force. At this time, since the backwater control valve 231 and the sewage control valve 241 are both in the closed state, the water in the filter cavity 610 does not flow out, the high-speed rotating filter mechanism 620 can stir the water flow in the filter cavity 610, and the formed turbulent water flow causes a certain impact force to the surface of the filter mechanism 620, so that the thread scraps can also fall off. The lint peeled off the surface of the filter mechanism 620 is integrated into the water in the filter cavity 610.

As shown in fig. 12, the circulation pump 400 is turned on, and the drain control valve 241 is also turned on to conduct the drain pipe 240, so that the sewage in the filter device 600 can be discharged from the drain 6103. The opening of the circulation pump 400 presses the air in the drainage pipeline 210 and the circulation pipeline 220 into the filter device 600, so that the sewage carrying the thread scraps in the filter device 600 is completely discharged from the sewage outlet 6103 under the air pressure, the sewage residue in the filter device 600 is avoided, and the cleaning effect on the filter device 600 is good. The drain control valve 241 is opened while the circulation pump 400 is opened, thereby ensuring the pressure generated when the air is introduced into the filtering apparatus 600, and further ensuring the sewage in the filtering apparatus 600 to be sufficiently discharged.

In order to prevent the water in the water containing cylinder 100 from entering the filtering device 600 through the circulation pipeline 220 after the sewage in the filtering device 600 is 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 containing cylinder 100 is stopped from being conveyed to the filtering device 600.

In a specific aspect of this embodiment, the first setting conditionCan be the first set time t for the circulation pump 400 to shut down 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 (2) can be obtained through a large number of experiments in advance and can be directly written into the control program of the washing machine.

Specifically, the first set time t ₁ The value of (2) is about the maximum time period required for the water level in the water discharge pipeline 210 to start to drop until stopping, and the second set time t ₂ Is about the minimum length of time required for the water level in the drain line 210 to rise near the top of the drain line 210 after the circulation pump 400 is turned on. In this way, a larger amount of air can be introduced into the pipeline during the closing period of the circulation pump 400, and meanwhile, the condition that water enters the filtering device 600 after the circulation pump 400 is opened is effectively avoided.

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: in the pipeline between the circulating pump 400 and the filtering device 600, the water level reaches the first set value H ₁ . The second setting condition is: in the pipeline between the circulating pump 400 and the filtering device 600, the water level reaches the second set value H ₂ . Wherein H is ₁ <H ₂ 。

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

In the above scheme, the first set value H ₁ The water level in the drain pipe 210 can be reduced to the first set value H after the circulation pump 400 is turned off and is larger than and as close as possible to the highest water level of the washing machine ₁ 。

The water level received from the washing machine into the drain line 210 rises to the second set value H ₂ There is typically a time difference between the switching device 270 switching on the drain line 210 and the drain line 250. To avoid ringingAfter the circulation pump 400 is started, water enters the filtering device 600 due to delay, and the second set value H is set ₂ A certain difference Δh is required between the value of (d) and the water level corresponding to the top end of the drain pipe 210. The specific value of the difference delta H can be obtained through a large number of experiments performed in advance, thereby ensuring that the water level received by the washing machine reaches the second set value H ₂ After the signal of (2), has enough response time to control the switching device 270 to complete the switching of the waterway.

In a further aspect of this embodiment, the washing machine determines that the current running process is the last rinsing stage in the current washing program, and turns off the circulation pump 400 after the rinsing is completed, and turns on the circulation pump 400 after the first setting 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 an operation state;

when the third set condition is reached, cutting off the circulating filter pipeline;

in the above-mentioned scheme, for the intermediate rinsing stage, since the washing machine still needs to continue to operate after that, that is, there is rinsing water circulating through the filtering device 600 to filter, the sewage carrying the lint in the filtering device 600 may not be drained at this time, and only the lint attached to the surface of the filtering mechanism 620 needs to be removed.

As shown in fig. 9, after the rinsing is finished, the backwater control valve 231 is closed, the drain control valve 241 is opened, the circulation pump 400 is kept in an operating state, water in the water containing drum 100 is continuously conveyed to the filtering device 600 under the action of the circulation pump 400, the inside of the filtering device 600 is rinsed, and the rinsed sewage is discharged into the drain pipeline 240 through the drain 6103.

In this embodiment, the third setting condition may be that the rinse end reaches a third preset time t ₃ The value of the thread scraps is obtained through experiments in advance and written into a control program, so that the thread scraps attached to the surface of the filtering mechanism 620 can be basically removed.

Alternatively, the water level in the water container 100 may be lowered to a predetermined value ΔH ₁ Time cut-offThe circulation filter line, i.e., the control switch 270, connects the drain line 210 with the drain line 250, and the circulation pump 400 continues to operate, thereby discharging the remaining water in the water tub 100 out of the washing machine.

In the preferred scheme of this embodiment, after the rinsing is finished, the driving mechanism 660 is started to drive the filtering mechanism 620 to rotate in the filtering cavity 610 at a high speed, so that the water in the filtering cavity 610 can be stirred, and the attached thread scraps are peeled off from the surface of the filtering mechanism 620 under the dual actions of centrifugal force and agitating water flow, are blended into the water in the filtering cavity 610, and are discharged out of the filtering cavity 610 through the drain 6103, so that the cleaning efficiency of the thread scraps is high.

In this embodiment, the washing machine performs an operation of turning off the circulation pump 400 and then turning on the circulation pump 400 only at the end of the last rinsing to completely drain the contaminated water in the filtering apparatus 600. And when the intermediate rinsing is finished, the circulating pump 400 keeps in an operating state, so that the phenomenon that the circulating pump 400 is frequently opened and closed in the operation process of the washing machine to influence the service life of the washing machine is avoided.

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

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

after the washing is finished, the circulating pump 400 keeps an operation state, closes the backwater control valve 231, and opens the pollution discharge control valve 241;

When the fourth setting condition is reached, the switching device 270 turns on the water outlet of the circulation pump 400 and the discharge pipe 250.

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

Since the circulation filtering rinsing is also required in the subsequent process of the washing process after the washing is completed, the sewage in the filtering apparatus 600 is not required to be completely discharged, and the circulation pump 400 can be maintained in an operating state without being turned off, similar to the intermediate rinsing.

In this embodiment, after the washing machine finishes washing and intermediate rinsing, the circulation pump 400 is controlled to keep operating, water in the water container 100 is conveyed to the filtering device 600 for flushing, and the flushed sewage 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 is introduced into the pipeline, the circulating pump 400 is started again after the air is introduced into the pipeline, and the air in the pipeline is introduced into the filtering device 600, so that the sewage in the pipeline is completely discharged, no sewage residue in the filtering device 600 is ensured after the washing machine stops running, and bacterial breeding can be effectively avoided. Meanwhile, the washing machine performs the operation of closing the circulation pump 400 and then opening only after the last rinsing is finished, thereby reducing unnecessary opening and closing operations of the circulation pump 400 and prolonging the service life of the circulation pump 400.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.

Claims

1. A control method of a filtering device, the filtering device comprises a filtering cavity capable of discharging sewage outwards and a filtering mechanism rotatably arranged in the filtering cavity, and the control method is characterized in that the filtering mechanism is controlled to rotate in the filtering cavity before and/or during the sewage is discharged outwards by the filtering device.

2. The method of controlling a filter apparatus according to claim 1, wherein the filter chamber is in communication with a drain line; the filter device also comprises a driving mechanism for driving the filter mechanism to rotate in the filter cavity;

The control method comprises the following steps: starting the driving mechanism to drive the filtering mechanism to rotate in the filtering cavity; and when the first set condition is reached, the sewage discharge pipeline is controlled to be conducted, and the filtering device discharges sewage outwards.

3. The method of claim 2, wherein the driving mechanism is kept in an on state after the first setting condition is reached, and the filtering mechanism is driven to rotate continuously.

4. The method of controlling a filter apparatus according to claim 1, wherein the filter chamber is in communication with a drain line; the filter device also comprises a driving mechanism for driving the filter mechanism to rotate in the filter cavity;

the control method comprises the following steps: and controlling the sewage discharge pipeline to be conducted, and controlling the driving mechanism to drive the filtering mechanism to rotate in the filtering cavity.

5. The control method of the filtering apparatus according to claim 4, characterized in that the control method comprises: after the sewage discharge pipeline is conducted for a certain period of time, the driving mechanism is controlled to continuously drive the filtering mechanism to rotate;

or after the sewage discharge pipeline is conducted for a certain period of time, the driving mechanism is controlled to stop working, so that the filtering mechanism is kept stationary in the filtering cavity.

6. A washing machine comprising a filtering device, characterized in that the washing machine controls the filtering device to perform the control method of the filtering device according to any one of claims 1-5.

7. The washing machine as claimed in claim 6, wherein the washing machine includes a recovery device for receiving the contaminated water discharged from the filtering device;

the washing machine controls the filtering mechanism to rotate in the filtering cavity before the filtering device discharges sewage to the recycling device and/or controls the filtering device to discharge sewage to the recycling device.

8. The washing machine as claimed in claim 7, wherein a drain outlet is provided on the filter chamber, the drain outlet is communicated with the recovery device through a drain pipe, and a drain control valve is provided on the drain pipe;

the washing machine controls the filtering mechanism to rotate in the filtering cavity before the drain control valve is controlled to be opened and/or when the drain control valve is controlled to be kept in an opened state.

9. The washing machine as claimed in any one of claims 6 to 8, further comprising a water tub and a circulation filter pipe, the water inlet and outlet ends of the circulation filter pipe being respectively connected to the water tub; the circulating filter pipeline is provided with a circulating pump, and the filter device is arranged between the water outlet end of the circulating pump and the water outlet end of the circulating filter pipeline;

The filter cavity is communicated with the sewage discharge pipeline, the washing machine starts the circulating pump to carry out circulating filtration rinsing in the rinsing process, and after the rinsing is finished, the circulating pump is closed to control the filter mechanism to rotate in the filter cavity;

when the first set condition is reached, the circulating pump is started and the sewage discharge pipeline is conducted, so that sewage in the filtering device is discharged.

10. The washing machine as claimed in claim 9, wherein the circulation filter line is shut off if a second set condition is reached after the first set condition is reached.