CN115125704B

CN115125704B - Washing machine and control method

Info

Publication number: CN115125704B
Application number: CN202210837681.1A
Authority: CN
Inventors: 江艳; 胡蓉; 唐阳洋
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2023-07-18
Anticipated expiration: 2042-07-15
Also published as: CN115125704A

Abstract

The invention provides a washing machine and a control method, wherein the washing machine comprises a clothes treatment barrel, a controller and a drainage device, wherein a water outlet is formed at the barrel bottom of the clothes treatment barrel, and the drainage device is arranged below the water outlet and comprises a sealing piece, a push rod, a driving motor and a detection piece; the sealing piece is provided with a sealing part, and one end of the ejector rod is connected with the sealing part; the driving motor is provided with an output shaft and is in driving connection with the ejector rod; the detection piece comprises a first detection unit and a second detection unit; the controller can determine the matching state of the sealing part and the water outlet according to the first detection signal and the second detection signal; the positions of the ejector rod and the output shaft are accurately controlled, and the sealing part seals the water outlet tightly; when the sealing part opens the water outlet, the water is smoothly discharged; ensuring the reliable operation of the washing machine; the ejector rod is matched with the guide hole through a bearing, so that friction between the ejector rod and the guide hole is reduced; the top of ejector pin forms the shirt rim, increases the area of contact of ejector pin and first sealing part, has improved the accuracy of location and the reliability of sealing.

Description

Washing machine and control method

Technical Field

The invention belongs to the technical field of clothes treatment equipment, and particularly relates to a washing machine and a control method.

Background

With the development of economy and society, the washing machine gradually becomes an indispensable household appliance in daily life of people; the washing machine with the single-tub structure is widely paid attention to gradually, when clothes are required to be washed, a water outlet of the washing tub is sealed through a water discharging device, and at the moment, the washing tub holds water and rotates to wash the clothes; when water is needed to be drained, the water draining device opens the water draining port of the washing tub, and water in the washing tub is drained; however, the lack of a necessary stroke detecting member causes inaccurate detection, and thus, inaccurate position control of the sealing member, inaccurate sealing of the drain port, and unsmooth drainage.

Disclosure of Invention

In view of the above, the present invention provides a washing machine and a control method thereof, so as to solve the problems of inaccurate detection and inaccurate position control of a sealing member caused by lack of a necessary stroke detecting member in a drainage device of a washing machine with a single-tub structure in the prior art.

The invention provides a washing machine, which comprises a clothes treatment barrel, a controller and a drainage device, wherein a water outlet is formed at the bottom of the clothes treatment barrel, the drainage device is arranged below the water outlet, and the drainage device comprises:

A sealing member having a first sealing portion for opening and closing the drain port;

one end of the ejector rod is connected with the first sealing part and can be controlled to move;

the driving motor is provided with an output shaft which is in driving connection with the ejector rod;

the detection piece comprises a first detection unit and a second detection unit; the first detection unit is arranged on the movement path of the ejector rod and is in communication connection with the controller, and is used for detecting the position of the ejector rod and transmitting a first detection signal to the controller; the second detection unit is arranged on the motion path of the output shaft and is in communication connection with the controller, and is used for detecting the position of the output shaft and transmitting a second detection signal to the controller;

the controller can determine the matching state of the first sealing part and the water outlet according to the first detection signal and the second detection signal.

Further optionally, the ejector rod has a first working position and a second working position in the movement direction thereof; the output shaft is provided with a third working position and a fourth working position in the movement direction;

the driving motor drives the ejector rod to move, and when the first detection signal is that the ejector rod is in a first working position and the second detection signal is that the output shaft is in a third working position, the first sealing part and the water outlet are in a contact state for sealing the water outlet;

When the first detection signal is that the ejector rod is in the second working position and the second detection signal is that the output shaft is in the fourth working position, the first sealing part and the water outlet are in a separated state for opening the water outlet.

Further optionally, the drain device further comprises a barrier provided at a bottom of the laundry treatment tub; the sealing element is provided with a positioning part matched with the blocking element, and the positioning part is positioned at the side part of the first sealing part;

the ejector rod is also provided with a fifth working position in the movement direction, and the fifth working position is positioned between the first working position and the second working position;

when the first detection signal is that the ejector rod is in a fifth working position, the first sealing part and the water outlet are in a separated state, the positioning part and the blocking piece are in a contact state, and the first sealing part is positioned below the water outlet.

Further optionally, the first detection unit and the second detection unit each include at least one positioning switch; the ejector rod is provided with different trigger structures, and the different trigger structures of the ejector rod can be matched with a positioning switch in the first detection unit; the transmission piece is provided with a triggering structure, and the triggering structure of the transmission piece can be matched with a positioning switch in the second detection unit.

Further alternatively, a third trigger structure, a first trigger structure and a second trigger structure are sequentially formed at one end of the ejector rod from top to bottom along the movement direction of the ejector rod, and the first trigger structure and the second trigger structure are oppositely arranged;

the first detection unit comprises a first positioning switch and a second positioning switch, a part of the first triggering structure and a part of the third triggering structure are arranged on the same side correspondingly, and the other part of the second positioning switch, the second triggering structure and the third triggering structure are arranged on the same side correspondingly;

the driving motor drives the ejector rod to move, and when the first positioning switch is contacted with the first triggering structure and the first positioning switch is disconnected, and the second positioning switch is contacted with the second triggering structure and the second positioning switch is disconnected, the controller judges that the first detection signal is that the ejector rod is in a first working position;

when the first positioning switch is contacted with the third trigger structure and the first positioning switch is closed, and the second positioning switch is contacted with the third trigger structure and the second positioning switch is closed, the controller judges that the first detection signal is that the ejector rod is in a second working position;

When the first positioning switch is contacted with the third triggering structure and enables the first positioning switch to be closed, and the second positioning switch is contacted with the second triggering structure and enables the second positioning switch to be opened, the controller judges that the first detection signal is that the ejector rod is in a fifth working position.

Further optionally, the output shaft is provided with a cam, and a fourth trigger structure is formed on the cam; the second detection unit comprises a third positioning switch and a fourth positioning switch; the position of the output shaft can be determined through the states of the third positioning switch and the fourth triggering structure or the states of the fourth positioning switch and the fourth triggering structure;

the driving motor drives the cam to rotate, and when the fourth positioning switch is contacted with the fourth triggering structure and the fourth positioning switch is disconnected, the controller judges that the second detection signal is that the output shaft is in a third working position;

when the third positioning switch is in contact with the fourth triggering structure and the third positioning switch is disconnected, the controller judges that the second detection signal is that the output shaft is in a fourth working position.

Further optionally, the washing machine comprises a washing mode, a dehydrating mode and a positioning mode; when the washing machine is in a washing mode, the first sealing part and the water outlet are in a contact state for sealing the water outlet;

When the washing machine is in a dehydration mode, the first sealing part and the water outlet are in a separated state for opening the water outlet;

when the washing machine is in a positioning mode, the positioning part is in contact with the blocking piece, and the first sealing part is positioned below the water outlet.

Further optionally, the washing machine further comprises a water collecting piece, wherein the water collecting piece is arranged below the water outlet; one of a magnetic induction sensor and a magnet is arranged on the water collecting piece, the other one of the magnetic induction sensor and the magnet is arranged at the bottom of the clothes treatment barrel, the magnetic induction sensor and the magnet are positioned in the same preset cylindrical surface, and the preset cylindrical surface is coaxial with the clothes treatment barrel; the magnetic induction sensor is electrically connected with the controller;

the clothes treating barrel rotates, and when the magnetic induction sensor outputs a signal, the controller controls the clothes treating barrel to stop rotating; the driving motor drives the ejector rod to move to a fifth working position, the controller controls the clothes treatment barrel to rotate and enables the positioning part to be in contact with the blocking piece, and then the first sealing part is located below the water outlet.

The invention also provides a control method of the washing machine, which comprises the following steps:

starting the washing machine and acquiring the first detection signal and the second detection signal;

determining the position of the ejector rod corresponding to the first detection signal;

determining a position of the output shaft corresponding to the second detection signal;

determining the matching state of the first sealing part and the water outlet according to the positions of the ejector rod and the output shaft;

and controlling the operation of the washing machine according to the matching state of the first sealing part and the water outlet.

Further alternatively, the first preset signal includes a first preset signal a, a first preset signal B, and a first preset signal C; the determining the position of the ejector rod corresponding to the first detection signal includes:

comparing the first detection signal with a first preset signal;

when the first detection signal is a first preset signal A, determining that the ejector rod is in a first working position;

when the first detection signal is a first preset signal B, determining that the ejector rod is in a second working position;

when the first detection signal is a first preset signal C, determining that the ejector rod is in a fifth working position;

The first preset signal A is that the first positioning switch is contacted with the first trigger structure and is disconnected, and the second positioning switch is contacted with the second trigger structure and is disconnected; the first preset signal B is that the first positioning switch is contacted with the third trigger structure and enables the first positioning switch to be closed, and the second positioning switch is contacted with the third trigger structure and enables the second positioning switch to be closed; the first preset signal C is that the first positioning switch is contacted with the third trigger structure and enables the first positioning switch to be closed, and the second positioning switch is contacted with the second trigger structure and enables the second positioning switch to be opened.

Further alternatively, the second preset signal includes a second preset signal a and a second preset signal B; the determining the position of the output shaft corresponding to the second detection signal includes:

comparing the second detection signal with a second preset signal;

when the second detection signal is a second preset signal A, determining that the output shaft is in a third working position;

when the second detection signal is a second preset signal B, determining that the output shaft is at a fourth working position;

the second preset signal A is that the fourth positioning switch is contacted with the fourth triggering structure and the fourth positioning switch is disconnected; the second preset signal B is that the third positioning switch is contacted with the fourth triggering structure and the third positioning switch is disconnected.

Further optionally, the determining the mating state of the first sealing portion and the drain port according to the positions of the ejector rod and the output shaft includes:

when the ejector rod is in a first working position and the output shaft is in a third working position, determining that the first sealing part and the water outlet are in a contact state for sealing the water outlet;

when the ejector rod is in the second working position and the output shaft is in the fourth working position, determining that the first sealing part and the water outlet are in a separated state for opening the water outlet;

when the ejector rod is in the fifth working position, the positioning part of the sealing element is in contact with the blocking element, and the first sealing part is positioned below the water outlet.

Further optionally, the controlling the operation of the washing machine according to the cooperation state of the first sealing part and the drain outlet includes:

when the target program is in a washing mode, controlling the washing machine to run, so that the ejector rod is in a first working position and the output shaft is in a third working position;

when the target program is in a dehydration mode, controlling the washing machine to run, so that the ejector rod is in a second working position and the output shaft is in a fourth working position;

When the target program is in a positioning mode, the washing machine is controlled to run, so that the ejector rod is in a fifth working position.

Further optionally, the controlling the operation of the washing machine according to the cooperation state of the first sealing part and the drain outlet further includes:

when the washing machine is in a dehydration mode, controlling the laundry treatment drum to rotate, and when the magnetic induction sensor outputs a signal, controlling the laundry treatment drum to stop rotating;

when the driving motor is controlled to drive the ejector rod to move and enable the ejector rod to be in a fifth working position, the clothes treatment barrel is controlled to rotate, the positioning part is contacted with the blocking piece, and the clothes treatment barrel is controlled to stop rotating;

and controlling the driving motor to drive the ejector rod to move, enabling the ejector rod to be in a first working position, enabling the output shaft to be in a third working position, and enabling the washing machine to run in a washing mode.

Compared with the prior art, the invention has the following main beneficial effects:

(1) Determining the position of the ejector rod according to the first detection signal, determining the position of the output shaft according to the second detection signal, and further determining the matching state of the first sealing part and the water outlet; the positions of the ejector rod and the output shaft are accurately controlled, and when the first sealing part seals the water outlet, the sealing is tight; when the first sealing part opens the water outlet, the water is smoothly discharged; ensuring the reliable operation of the washing machine;

(2) When the ejector rod is in the first working position and the output shaft is in the third working position, the water outlet is closed; when the ejector rod is in the second working position and the output shaft is in the fourth working position, the water outlet is opened; when the ejector rod is in the fifth working position, the clothes treatment barrel rotates and enables the positioning part and the blocking piece to be in a contact state, so that the first sealing part is positioned below the water outlet; the positioning accuracy of the water outlet is improved, the positioning is accurate, and the problems of inaccurate positioning and positioning error caused by abrasion of the existing water discharging device are solved;

(3) The structure of the water draining device is simplified, and the control process of opening and sealing the water draining port is optimized; the water outlet is opened rapidly and the water is drained timely, so that the installation is convenient and quick; the motor required by the positioning device is reduced, and the integration of opening, positioning and sealing of the water outlet is realized; the problems of high cost and complex installation process of the existing drainage device caused by the fact that different structures are needed for positioning and sealing the drainage device are solved;

(4) The ejector rod is provided with a plurality of trigger structures, the drainage device is correspondingly provided with a plurality of positioning switches, so that the movement of the ejector rod is controlled, the position of the sealing element is accurately controlled, the washing mode and the dehydration mode of the washing machine are optimized, and the problem of inaccurate position control of the sealing element is solved;

(5) When clothes are washed, the washing machine is controlled to run corresponding target programs according to the positions of the ejector rod and the output shaft, so that the washing machine can quickly enter a washing mode, the preparation program required before washing is simplified, and the preparation time required before washing is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.

FIG. 1a is a schematic structural view of an embodiment of a washing machine according to the present invention when a top rod is in a first working position;

FIG. 1b is a schematic structural view of an embodiment of a washing machine according to the present invention when a top rod is in a second working position;

FIG. 1c is a schematic structural view of an embodiment of a washing machine according to the present invention when a top rod is in a fifth working position;

FIG. 2a is a schematic structural diagram of an embodiment of a drainage device according to the present invention;

fig. 2b is a schematic structural diagram of a first limiting structure according to an embodiment of the present invention;

fig. 3a is a schematic structural diagram of an embodiment of the drainage device provided by the present invention when the first limiting portion rotates to the upper stop position a;

fig. 3B is a schematic structural diagram of an embodiment of the drainage device provided by the present invention when the first limiting portion rotates to the lower stop position B;

fig. 4a is a schematic structural diagram of an embodiment of the first bracket and the first limiting structure provided by the present invention when the first limiting portion rotates to the upper stop position a;

fig. 4B is a schematic structural diagram of an embodiment of the first bracket and the first limiting structure provided by the present invention when the first limiting portion rotates to the lower stop position B;

FIG. 5a is a schematic view of an embodiment of the drainage device according to the present invention when the remote end of the cam contacts the fourth positioning switch;

FIG. 5b is a schematic view of an embodiment of the drainage device according to the present invention when the remote end of the cam contacts the third positioning switch;

FIG. 6 is a schematic structural view of an embodiment of a flange according to the present invention;

fig. 7a and 7b are schematic structural views of an embodiment of a washing machine provided by the present invention when the first sealing part is engaged with the blocking member;

FIG. 8 is a flow chart of a control method of a washing machine according to an embodiment of the present invention;

in the figure:

1-a laundry treatment tub; 11-a water outlet; 12-flanges; 13-a barrier;

2-a water collecting piece; 21-mounting position; 22-a first fixing part;

31-a seal; 311—a first seal; 312-a second seal; 313-positioning part; 314—a corrugated section; 315-sealing the cavity; 316-positioning columns; 317-positioning shells; 32-ejector rods; 321-a first trigger structure; 322-a second trigger structure; 323-a third trigger structure; 324-skirt; 33-a second scaffold; 331-mounting plate; 332-a second fixing portion; 333-seal groove; 334—a guide; 335-a guide hole;

34-a first scaffold; 341-a mounting cavity; 351—a first positioning switch; 352-second positioning switch; 353-a third positioning switch; 354-fourth position switch; 361-an elastic member; 362-a drive motor; 3621-output shaft; 363-cam; 364-hauling rope; 371-bearings; 372-a bracket rear cover;

41-a first limiting structure; 411-shaft portion; 412-a first stop; 42-a second limiting structure; 421-a second limit structure A; 422-a second limit structure B;

51-magnetic induction sensor; 52-magnet.

Detailed Description

Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

The washing machine with the single-tub structure is widely paid attention to gradually, when clothes are required to be washed, a water outlet of the washing tub is sealed through a water discharging device, and at the moment, the washing tub holds water and rotates to wash the clothes; when water is needed to be drained, the water draining device opens the water draining port of the washing tub, and water in the washing tub is drained; however, the lack of a necessary stroke detecting member causes inaccurate position control of the sealing member, inaccurate sealing of the drain port, and unsmooth drainage;

The invention creatively provides a washing machine, which comprises a clothes treatment barrel, a controller and a drainage device, wherein a water outlet is formed at the barrel bottom of the clothes treatment barrel, and the drainage device is arranged below the water outlet and comprises a sealing element, a push rod, a driving motor and a detection element; the sealing piece is provided with a sealing part, and one end of the ejector rod is connected with the sealing part; the driving motor is provided with an output shaft and is in driving connection with the ejector rod; the detection piece comprises a first detection unit and a second detection unit; the first detection unit is used for detecting the position of the ejector rod and transmitting a first detection signal to the controller; the second detection unit is used for detecting the position of the output shaft and transmitting a second detection signal to the controller; the controller can determine the states of the sealing part and the water outlet according to the first detection signal and the second detection signal;

the positions of the ejector rod and the output shaft are accurately controlled, and when the sealing part seals the water outlet, the sealing is tight; when the sealing part opens the water outlet, the water is smoothly discharged; ensuring the reliable operation of the washing machine.

Example 1

< stopper >

As shown in fig. 2a, 2b, 3a and 3b, the present embodiment provides a washing machine including a laundry treating tub 1 and a drain device, a drain opening 11 is formed at a tub bottom of the laundry treating tub 1, the drain device is disposed below the drain opening 11 and includes a sealing member 31, a push rod 32, a driving motor 362, a detecting member and a limiting member; the sealing member 31 is formed with a first sealing portion 311, specifically, the laundry treating tub 1 is a washing tub, and an axis of the washing tub extends in a vertical direction; the sealing member 31 is made of elastic material, and a first sealing part 311 is formed at one end close to the water outlet 11, and the first sealing part 311 is matched with the water outlet 11 in an opening and closing way, so that the water outlet 11 can be opened or closed; one end of the ejector rod 32 is connected with the first sealing part 311, and the ejector rod 32 can drive the first sealing part 311 to move, so that the first sealing part 311 opens and closes the water outlet 11; the driving motor 362 is formed with an output shaft 3621, and the output shaft 3621 is in driving connection with the ejector rod 32;

The detection piece comprises a first detection unit and a second detection unit; the first detection unit is arranged on the movement path of the ejector rod 32 and is in communication connection with the controller, and is used for detecting the position of the ejector rod 32 and transmitting a first detection signal to the controller; the second detection unit is arranged on the motion path of the output shaft and is in communication connection with the controller, and is used for detecting the position of the output shaft 3621 and transmitting a second detection signal to the controller; specifically, the first detection unit and the second detection unit are electrically connected with the controller;

the controller may determine that the first sealing part 311 and the drain opening 11 are in a contact state of closing the drain opening 11 or that the first sealing part 311 and the drain opening 11 are in a separation state of opening the drain opening 11 according to the first detection signal and the second detection signal;

in summary, the positions of the ejector 32 and the output shaft 3621 are accurately controlled, and the first seal 311 seals the drain port 11 tightly; when the first sealing portion 311 opens the drain port 11, the drain is smooth; ensuring the reliable operation of the washing machine.

Further, as shown in fig. 4a and 4b, the driving motor 362 is formed with an output shaft 3621; the limiting piece comprises a first limiting structure 41 and a second limiting structure 42, the output shaft 3621 is provided with the first limiting structure 41, and the first limiting structure 41 can synchronously rotate along with the output shaft 3621; the drainage device further comprises a first bracket 34 capable of fixing the driving motor 362, the first bracket 34 is provided with a second limiting structure 42, the second limiting structure 42 is positioned on the rotating path of the first limiting structure 41, and when the first limiting structure 41 rotates, the second limiting structure 42 is separated from or contacted with the first limiting structure 42;

When the driving motor 362 is started, the first limiting structure 41 and the second limiting structure 42 are separated, and the output shaft 3621 and the first limiting structure 41 can synchronously rotate; the first limiting structure 41 is contacted with the second limiting structure 42, and the output shaft 3621 is limited to continue to rotate, so that the reliable operation of the driving motor is ensured.

Preferably, the first limiting structure 41 is formed with a shaft 411 and a first limiting portion 412, the shaft 411 is sleeved on the output shaft 3621 and is fixedly connected with the output shaft 3621, the first limiting portion 412 is formed on the outer peripheral side of the shaft 411, specifically, the first limiting portion 412 is a bump extending along the radial direction of the shaft 411; the first limiting part 412 has an upper stop position a and a lower stop position B in the movement direction, wherein the upper stop position a is the maximum travel position of the first limiting part 412 in the movement forward direction, the lower stop position B is the maximum travel position of the first limiting part 412 in the movement reverse direction, and the forward direction and the reverse direction are two opposite movement directions of the first limiting part 412;

the second limiting structure 42 includes a second limiting structure a 421 and a second limiting structure B422, and the second limiting structure a 421 and the second limiting structure B422 are alternately arranged on the rotation path of the first limiting portion 412;

when the output shaft 3621 rotates, the first limiting portion 412 contacts with the second limiting structure a 421, and the first limiting portion 412 rotates to the upper stop position a, so that the output shaft 3621 is limited to continue rotating;

The first limiting part 412 contacts with the second limiting structure B422, and then the first limiting part 412 rotates to the lower stop position B, the output shaft 3621 is limited to continue rotating, the driving motor 362 is controlled to stop moving, and the problem that the sealing element 31 is damaged due to the over-stroke of the driving motor 362 is avoided.

< seal >

As shown in fig. 6, the drain device further includes a blocking member 13 provided at the bottom of the laundry treating tub 1; the seal 31 is formed with a positioning portion 313 engaged with the stopper 13, the positioning portion 313 is located at a side portion of the first seal portion 311 and an outer peripheral side of the positioning portion 313 is covered with a positioning case 317; specifically, the bottom of the clothes treating barrel 1 is provided with a flange 12, the flange 12 is provided with a blocking piece 13, the blocking piece 13 is an arc section and is positioned at the outer periphery side of the water outlet 11 for positioning the water outlet 11, so as to prepare for closing the water outlet 11 subsequently; the driving motor 362 drives the first sealing part 311 to move, and when the positioning case 317 contacts the stopper 13, the first sealing part 311 is positioned below the drain port 11; the positioning accuracy of the water outlet 11 is improved, the positioning is accurate, and the problem of inaccurate positioning of the existing water discharging device is solved;

the positioning shell 317 is made of metal, so that friction resistance between the positioning part 313 and the blocking piece 13 is reduced, and the problems that a positioning mechanism of the existing drainage device is easy to wear and positioning errors are generated after the positioning mechanism is worn are solved;

The top of the carrier rod 32 forms a skirt 324; the seal 31 is formed with a corrugated section 314 between the first seal portion 311 and the bottom of the seal 31, the corrugated section 314 extending in the moving direction of the first seal portion 311; the first sealing part 311 and the corrugated section 314 enclose a sealing cavity 315; the top of the ejector rod 32 extends upwards into the sealing cavity 315 and is connected with the first sealing part 311 through the skirt 324; the skirt edge 324 enlarges the contact area between the ejector rod 32 and the first sealing part 311, and ensures that the positioning part 313 and the first sealing part 311 have certain rigidity, thereby improving the positioning accuracy and the sealing reliability; when the first sealing part 311 moves along with the ejector rod 32, the corrugated section 314 stretches or contracts, so that the sealing element 31 forms continuous and reliable sealing on all parts in the sealing cavity 315 and at the bottom of the sealing element 31, and the problem that the driving motor 362 is out of order due to the fact that the sealing is not tight is solved.

< labyrinth seal Structure >

As shown in fig. 1a, 1b and 1c, the washing machine further includes a water collecting member 2, the water collecting member 2 being disposed below the water outlet 11; the bottom of the water collecting piece 2 is provided with a mounting position 21, and the water draining device is arranged at the mounting position 21; the bottom of the mounting position 21 forms a first fixing portion 22; specifically, the mounting location 21 is a cylindrical cavity; the first fixing portion 22 is the bottom of the side wall of the column cavity; the water collecting piece 2 is a water receiving disc;

The drainage device further includes a second bracket 33 provided at the bottom of the installation site 21, the second bracket 33 being formed with an installation plate 331, the bottom of the seal 31 being provided between the first fixing portion 22 and the installation plate 331, and a labyrinth seal structure being formed between the first fixing portion 22 and the installation plate 331; the sealing effect is good, the problem that the driving motor 362 is failed because water discharged from the clothes treating bucket 1 enters the mounting cavity 341 through the bottom of the sealing piece 31 is avoided, and the water is prevented from flowing out of the water collecting piece 2;

in order to solve the problem of poor sealing effect between the bottom of the sealing member 31 and the second bracket 33, the present embodiment proposes that a plurality of second fixing portions 332 are formed on the side of the mounting plate 331 facing the mounting position 21, and a sealing groove 333 is formed between two adjacent second fixing portions 332; the bottom of the sealing member 31 is provided with a second sealing part 312, the structure of the second sealing part 312 is matched with that of the sealing groove 333, the second sealing part 312 and the first fixing part 22 are embedded in the sealing groove 333, and a labyrinth sealing structure is formed between the second sealing part 312 and the second fixing part 332 as well as between the second sealing part and the sealing groove 333;

specifically, the mounting plate 331 is a circular plate, and a second fixing portion a and a second fixing portion B are sequentially disposed along a radial direction of the mounting plate 331 from inside to outside, where the second fixing portion a and the second fixing portion B are in an arc structure or an annular structure, and when the second fixing portion a and the second fixing portion B are in an arc structure, a plurality of second fixing portions a and B may be disposed along a circumferential direction of the mounting plate 331; correspondingly, the sealing groove 333 is an arc-shaped groove or an annular groove, the second sealing part 312 is sequentially provided with a second sealing part A, a second sealing part B and a second sealing part C from inside to outside along the radial direction of the mounting plate 331, the second sealing part A, the second sealing part B and the second sealing part C are of bending structures, the second sealing part A is matched with the second fixing part A, the second sealing part B is embedded in the sealing groove 333, the first fixing part 22 is embedded in the second sealing part B, the second sealing part C is matched with the second fixing part B, and then a labyrinth sealing structure is formed among the first fixing part 22, the bottom of the sealing piece 31 and the second bracket 33, so that the sealing effect is good, and the problem that water discharged by the clothes treating barrel 1 enters the mounting cavity 341 through the second sealing part 312 to cause the failure of the driving motor 362 is effectively avoided.

< positioning hole and positioning column >

As shown in fig. 4a and 4b, in order to solve the problem that the bottom of the sealing member 31 is positioned inaccurately and is easy to shake, the present embodiment proposes that the mounting plate 331 is formed with a positioning hole at the sealing groove 333, and the second sealing portion 312 is formed with a positioning post 316; when the second sealing part 312 is embedded in the sealing groove 333, the positioning column 316 is matched with the positioning hole to position the sealing element 31 on the mounting plate 331; accurate positioning, simple process, quick installation and avoidance of shaking of the sealing element 31 in the use process.

< ejector rod and traction rope >

As shown in fig. 4a and 4b, the first bracket 34 is detachably disposed at the bottom of the mounting plate 331, the first bracket 34 is formed with a mounting cavity 341, the mounting plate 331 is formed with a guide portion 334 toward one side of the seal member 31, the guide portion 334 extends along the movement direction of the first seal portion 311, and the guide portion 334 is formed with a guide hole 335; the drainage device further comprises a traction rope 364, a cam 363 and an elastic member 361; the driving motor 362 and the cam 363 are arranged at the bottom of the mounting cavity 341, and the cam 363 is in driving connection with the output shaft 3621; one end of a traction rope 364 is connected with a cam 363, and the other end of the traction rope 364 is connected with the bottom of the ejector rod 32; the sealing cavity 315, the guide hole 335 and the mounting cavity 341 are sequentially communicated; the top of the ejector rod 32 sequentially passes through the mounting cavity 341 and the guide hole 335, extends upwards to the sealing cavity 315, and is connected with the first sealing part 311 through the skirt 324;

Specifically, the guide portion 334 is a column-shaped or cone-shaped structure extending in the vertical direction; the ejector rod 32 is a straight rod and extends along the vertical direction, and under the action of the traction rope 364 and the elastic piece 361, the ejector rod 32 slides up and down along the vertical direction, so that the water outlet 11 is opened, positioned and closed; the accuracy of positioning the first sealing portion 311 and the tightness of closing the drain port 11 are improved; the ejector rod 32 is matched with the guide hole 335 through the bearing 371, so that friction between the ejector rod 32 and the guide hole 335 is reduced; the sealing element 31 is made of rubber, and the elastic element 361 is a spring; the guide holes 335 play a role in guiding the ejector rod 32, so that the ejector rod 32 can stably run; the second bracket 33 improves the reliability of the whole drainage device; the elastic member 361 is sleeved on the outer side of the ejector rod 32, one end of the elastic member 361 is connected with the guide part 334, and the other end of the elastic member 361 is connected with the top of the ejector rod 32; the first bracket 34, the second bracket 33, the sealing element 31 and the elastic element 361 are coaxially arranged with the ejector rod 32;

the process of installing the drainage device is as follows:

the skirt 324 and the first sealing part 311 are assembled together by using rubber to generate a certain degree of deformation; the bearing 371 is installed in the guide hole 335, and the elastic member 361 is passed through the jack 32; the ejector rod 32 passes through the bearing 371, and the elastic element 361 is arranged between the guide part 334 and the skirt 324; pressing the elastic member 361 so that the positioning posts 316 of the sealing member 31 are fitted into the corresponding positioning holes; the driving motor 362 is arranged at the bottom of the mounting cavity 341, the first limiting structure 41 is arranged on the output shaft 3621, and the second limiting structure 42 is arranged on the first bracket 34 and corresponds to the first limiting structure 41; the first bracket 34 is arranged at the bottom of the mounting plate 331, and the mounting cavity 341 corresponds to the guide hole 335; one end of the traction rope 364 is connected with the bottom of the ejector rod 32, and the other end of the traction rope 364 is wound on the cam 363; the cam 363 is connected to an output shaft 3621 of the drive motor 362; the bottom of the seal 31 is disposed between the first fixing portion 22 and the mounting plate 331, and the second sealing portion 312 corresponds to the seal groove 333; the mounting plate 331 is connected to the first fixing portion 22 by screws.

As shown in fig. 1a, 1b and 1c, under the action of the cam 363, the traction rope 364 and the elastic member 361, the ejector rod 32 can move up and down, thereby realizing the opening and closing of the drain port 11, and switching between the washing mode and the dehydrating mode of the washing machine; the ejector rod 32 has a first working position, a second working position and a fifth working position in the movement direction, and the fifth working position is positioned between the first working position and the second working position; the output shaft 3621 has a third working position and a fourth working position in the direction of movement thereof;

the driving motor 362 rotates in the forward direction, one end of the traction rope 364 is wound on the cam 363, the other end of the traction rope 364 drives the push rod 32 to move downwards, and then the first sealing part 311 moves in a direction away from the drain port 11, and the elastic member 361 is compressed to store energy; when the first detection signal is that the push rod 32 is at the second working position and the second detection signal is that the output shaft 3621 is at the fourth working position, the first sealing part 311 and the water discharge port 11 are in a state of opening the water discharge port 11, and the washing machine is in a dehydrating mode to discharge water in the laundry treating tub 1;

the driving motor 362 rotates reversely, the elastic member 361 releases energy, one end of the traction rope 364 is unfolded by the cam 363, and the ejector rod 32 drives the first sealing part 311 to move towards the direction approaching the water outlet 11; when the first detection signal is that the push rod 32 is at the fifth working position, the laundry treating tub 1 is controlled to rotate, and when the positioning casing 317 is in contact with the blocking member 13, the first sealing part 311 is positioned below the drain opening 11, and the washing machine is in the positioning mode;

The driving motor 362 continues to rotate reversely, the elastic member 361 continues to release energy, and the ejector rod 32 drives the first sealing portion 311 to move continuously in a direction approaching the water outlet 11; when the first detection signal is that the ejector rod 32 is in the first working position and the second detection signal is that the output shaft 3621 is in the third working position, the first sealing part 311 and the water outlet 11 are in a state of closing the water outlet 11, and the washing machine can operate in a washing mode to wash clothes at the moment;

in summary, the structure of the drain device is simplified, and the control process of opening and sealing the drain opening 11 is optimized; the water outlet 11 is opened quickly and drained timely, and the installation is convenient and quick; the motor required by the positioning device is reduced, and the integration of opening, positioning and sealing of the water outlet 11 is realized; the problems of high cost and complex installation process of the existing drainage device caused by the fact that different structures are needed for positioning and sealing the drainage device are solved; in the washing mode, no water exists between the clothes treatment barrel 1 and the water collecting piece 2, so that the problem of dirt collection on the outer side wall of the barrel and the outer side of the barrel bottom of the clothes treatment barrel 1 is avoided, and the washing water consumption is reduced; the problems of complex structure and complicated control process of the existing drainage device are solved.

The drainage device further comprises a bracket rear cover 372 which is covered on the outer side of the driving motor 362 and used for protecting the motor.

< trigger Structure and positioning switch >

As shown in fig. 5a and 5b, one end of the ejector rod 32 is sequentially formed with a third trigger structure 323, a first trigger structure 321 and a second trigger structure 322 from top to bottom along the length direction of the ejector rod 32, and the first trigger structure 321 and the second trigger structure 322 are oppositely arranged; specifically, the first triggering structure 321 is located above the second triggering structure 322; the ejector rod 32 is provided with a third trigger structure 323 above the first trigger structure 321 and the second trigger structure 322, the first trigger structure 321 and the second trigger structure 322 are single-side notches formed along the radial direction of the ejector rod 32, and the third trigger structure 323 is the structure of the ejector rod 32;

the first detection unit comprises a first positioning switch 351 and a second positioning switch 352, and both are normally open micro switches; the first positioning switch 351 and the second positioning switch 352 are arranged at the top of the mounting cavity 341 and are oppositely arranged at two sides of the ejector rod 32; a part of the first positioning switch 351, the first triggering structure 321 and the third triggering structure 323 are arranged corresponding to the same side, and the other part of the second positioning switch 352, the second triggering structure 322 and the third triggering structure 323 are arranged corresponding to the same side;

the bottom of the mounting cavity 341 is provided with a driving motor 362, the output shaft 3621 is provided with a cam 363, and a fourth trigger structure is formed on the cam 363; the second detection unit includes a third positioning switch 353 and a fourth positioning switch 354, which are respectively disposed at both sides of the cam 363; the third positioning switch 353 and the fourth positioning switch 354 are normally closed micro-switches; preferably, the third positioning switch 353 and the fourth positioning switch 354 are disposed in series in a line for controlling the forward and reverse rotation of the driving motor 362; the remote end of the cam 363 is a fourth trigger structure, which can be contacted with the third positioning switch 353 or the fourth positioning switch 354; the first positioning switch 351, the second positioning switch 352, the second positioning switch A353 and the fourth positioning switch 354 are electrically connected with a controller of the washing machine and respectively transmit signals to the controller; the state of the drainage device can be judged through the signal combination transmitted by the plurality of positioning switches, so that the movement of the drainage device is accurately controlled;

The driving motor 362 drives the ejector rod 32 to move, and when the first positioning switch 351 contacts with the first triggering structure 321 and turns off the first positioning switch 351, and the second positioning switch 352 contacts with the second triggering structure 322 and turns off the second positioning switch 352, the controller judges that the first detection signal is that the ejector rod 32 is in the first working position; specifically, since the first trigger structure 321 and the second trigger structure 322 are both single-sided notch structures, the first positioning switch 351 and the second positioning switch 352 are both normally open micro switches, and when the first positioning switch 351 is in contact with the first trigger structure 321, the first positioning switch 351 is in an off state; when the second positioning switch 352 is in contact with the second triggering structure 322, the second positioning switch 352 is in an off state;

when the first positioning switch 351 contacts with the third triggering structure 323 and enables the first positioning switch 351 to be closed, and the second positioning switch 352 contacts with the third triggering structure 323 and enables the second positioning switch 352 to be closed, the controller judges that the first detection signal is that the ejector rod 32 is in the second working position; specifically, since the third triggering structure 323 is a structure of the ejector rod 32, the first positioning switch 351 and the second positioning switch 352 are both normally open micro switches, and when the first positioning switch 351 contacts with the third triggering structure 323, the first positioning switch 351 is in a closed state; when the second positioning switch 352 is in contact with the third triggering structure 323, the second positioning switch 352 is in a closed state;

When the first positioning switch 351 contacts the third triggering structure 323 and makes the first positioning switch 351 close, and the second positioning switch 352 contacts the second triggering structure 322 and makes the second positioning switch 352 open, the controller determines that the first detection signal is that the ejector rod 32 is in the fifth working position.

The driving motor 362 drives the cam to rotate, and when the fourth positioning switch 354 contacts with the fourth triggering structure and the fourth positioning switch 354 is disconnected, the controller judges that the second detection signal is that the output shaft 3621 is in the third working position;

when the third positioning switch 353 contacts the fourth triggering structure and turns off the third positioning switch 353, the controller determines that the second detection signal is the output shaft 3621 at the fourth operating position.

In summary, the controller controls the movement of the ejector rod and accurately controls the positions of the sealing element and the output shaft through the signals transmitted by the positioning switch, so that the washing mode and the dehydration mode of the washing machine are optimized, and the problem of inaccurate position control of the sealing element is solved; when the positioning switch breaks down, the motor can not stop moving in the safety range, so that the sealing element is damaged and the traction rope is broken, the output shaft moves in the effective stroke range through the cooperation of the first limiting structure and the second limiting structure, and the problem that the sealing element is lost due to the overtravel operation of the output shaft is avoided.

< magnetic induction sensor and magnet >

As shown in fig. 7a and 7b, the washing machine further includes a water collecting member 2, the water collecting member 2 being disposed under the water discharge port 11; the water collecting piece 2 is provided with a magnetic induction sensor 51, the bottom of the clothes treatment barrel 1 is provided with a magnet 52, the magnetic induction sensor 51 and the magnet 52 are positioned in the same preset cylindrical surface, and the preset cylindrical surface is coaxial with the clothes treatment barrel 1; the magnetic induction sensor 51 is electrically connected with the controller; the laundry treating tub 1 rotates to drive the magnet 52 to rotate, and the magnetic induction sensor 51 senses the magnet 52 to output a signal to the controller.

< control method >

As shown in fig. 8, the present embodiment further provides a control method of the washing machine, where the control method includes:

s1, starting a washing machine and acquiring a first detection signal and a second detection signal;

s2, determining the position of the ejector rod 32 corresponding to the first detection signal;

s3, determining the position of an output shaft 3621 corresponding to the second detection signal;

s4, determining the matching state of the first sealing part 311 and the water outlet 11 according to the positions of the ejector rod 32 and the output shaft 3621;

s5, controlling the operation of the washing machine according to the matching state of the first sealing part 311 and the water outlet 11.

Further, the first preset signal includes a first preset signal a, a first preset signal B, and a first preset signal C; s2 comprises the following steps:

Comparing the first detection signal with a first preset signal;

when the first detection signal is a first preset signal A, determining that the ejector rod 32 is in a first working position;

when the first detection signal is the first preset signal B, determining that the ejector rod 32 is in the second working position;

when the first detection signal is a first preset signal C, determining that the ejector rod 32 is in a fifth working position;

the first preset signal a is that the first positioning switch 351 contacts with the first triggering structure 321 and turns off the first positioning switch 351, and the second positioning switch 352 contacts with the second triggering structure 322 and turns off the second positioning switch 352; the first preset signal B is when the first positioning switch 351 contacts the third trigger structure 323 and causes the first positioning switch 351 to be closed, and the second positioning switch 352 contacts the third trigger structure 323 and causes the second positioning switch 352 to be closed; the first preset signal C is that the first positioning switch 351 contacts the third triggering structure 323 and turns on the first positioning switch 351, and the second positioning switch 352 contacts the second triggering structure 322 and turns off the second positioning switch 352.

The second preset signal comprises a second preset signal A and a second preset signal B; s3 comprises the following steps:

comparing the second detection signal with a second preset signal;

When the second detection signal is a second preset signal a, determining that the output shaft 3621 is in a third working position;

when the second detection signal is the second preset signal a, determining that the output shaft 3621 is at the fourth working position;

the second preset signal a is that the fourth positioning switch 354 contacts with the fourth triggering structure and turns off the fourth positioning switch 354; the second preset signal B is that the third positioning switch 353 is in contact with the fourth triggering structure and turns off the third positioning switch 353.

S4 comprises the following steps:

when the ejector 32 is in the first working position and the output shaft 3621 is in the third working position, it is determined that the first sealing portion 311 and the drain opening 11 are in a contact state closing the drain opening;

when the jack 32 is in the second working position and the output shaft 3621 is in the fourth working position, it is determined that the first sealing portion 311 and the drain opening 11 are in a separated state in which the drain opening is opened;

when the ejector 32 is in the fifth working position, the positioning portion 313 of the seal 31 is determined to be in contact with the stopper 13, and the first seal portion 311 is positioned below the drain opening.

S5 comprises the following steps:

when the target program is in a washing mode, the washing machine is controlled to operate, so that the ejector rod 32 is in a first working position and the output shaft 3621 is in a third working position;

when the target program is in the dewatering mode, the washing machine is controlled to operate, so that the ejector rod 32 is in the second working position and the output shaft 3621 is in the fourth working position;

When the target program is in the positioning mode, controlling the washing machine to run so that the ejector rod 32 is in the fifth working position;

further, when the washing machine is in a dehydrating mode, the laundry treating tub 1 is controlled to rotate, and when the magnetic induction sensor 51 outputs a signal, the laundry treating tub 1 is controlled to stop rotating;

when the driving motor 362 is controlled to drive the push rod 32 to move and the push rod 32 is in the fifth working position, the clothes treating drum 1 is controlled to rotate, the positioning part 313 is contacted with the blocking piece 13, and the clothes treating drum 1 is controlled to stop rotating;

the control driving motor 362 drives the push rod 32 to move and makes the push rod 32 in the first working position and the output shaft 3621 in the third working position, so that the washing machine can operate in a washing mode.

In summary, when washing clothes, the washing machine is controlled to run the corresponding target program according to the positions of the ejector rod and the output shaft, so that the washing machine can quickly enter a washing mode, the preparation program required before washing is simplified, and the preparation time required before washing is shortened.

Example 2

< control method >

Unlike embodiment 1, this embodiment also provides a control method of the washing machine described in any one of the above, the control method including:

s4, controlling the washing machine to run corresponding programs according to the positions of the ejector rod 32 and the output shaft 3621 so as to enter a washing mode;

s5, controlling the washing machine to run in a dehydration mode;

further, S4 includes:

s41, when the first detection signal is that the ejector rod 32 is in the first working position and the second detection signal is that the output shaft 3621 is in the third working position, controlling the washing machine to directly enter a washing mode;

s42, when the first detection signal is that the ejector rod 32 is in the second working position and the second detection signal is that the output shaft 3621 is in the fourth working position, controlling the washing machine to enter a washing mode after entering a dehydration mode;

specifically, (1) the step of the washing machine entering a dehydrating mode includes:

the driving motor 362 rotates in the forward direction, one end of the traction rope 364 is wound on the cam 363, the other end of the traction rope 364 drives the push rod 32 to move downwards, and then the first sealing part 311 moves in a direction away from the drain port 11, and the elastic member 361 is compressed to store energy; when the first positioning switch 351 contacts with the third triggering structure 323 and enables the first positioning switch 351 to be closed, and the second positioning switch 352 contacts with the third triggering structure 323 and enables the second positioning switch 352 to be closed, the controller judges that the first detection signal is that the ejector rod 32 is in the second working position;

Meanwhile, when the fourth triggering structure contacts with the third positioning switch 353 and turns off the third positioning switch 353, the controller judges that the second detection signal is that the output shaft 3621 is at the fourth working position; at this time, the first sealing part 311 and the drain port 11 are in a state of opening the drain port 11, and the washing machine is in a dehydrating mode;

when the third positioning switch 353 fails, the output shaft 3621 drives the first limiting portion 412 to continue rotating until the first limiting portion 412 rotates and contacts the second limiting structure B422, and the output shaft 3621 is limited to continue rotating;

if the driving motor 362 does not receive the stop signal within the allowable fault tolerance range, the second limiting portion prevents the first limiting portion 412 from continuing to rotate, the driving motor 362 is blocked, and the driving motor 362 may be burnt out when the temperature is too high after a certain time of blocking, but the traction rope 364, the ejector rod 32 and the sealing member 31 are retained.

(2) The step of the washing machine entering the washing mode from the dehydrating mode includes:

the driving motor 362 rotates reversely, the elastic member 361 releases energy and drives the push rod 32 to move upwards, one end of the traction rope 364 is unfolded by the cam 363, and the push rod 32 drives the first sealing part 311 to move towards the direction close to the water outlet 11; when the first positioning switch 351 contacts with the third triggering structure 323 and enables the first positioning switch 351 to be closed, and the second positioning switch 352 contacts with the second triggering structure 322 and enables the second positioning switch 352 to be opened, the controller judges that the first detection signal is that the ejector rod is in the fifth working position; the controller controls the laundry treating tub 1 to rotate such that the positioning case 317 contacts the stopper 13, and the first sealing part 311 is positioned under the drain port 11, when the washing machine is in the positioning mode;

The driving motor 362 continues to rotate reversely, the elastic member 361 continues to release energy and drives the ejector rod 32 to move upwards, and when the first positioning switch 351 contacts with the first triggering structure 321 and turns off the first positioning switch 351, and the second positioning switch 352 contacts with the second triggering structure 322 and turns off the second positioning switch 352, the controller judges that the first detection signal is that the ejector rod 32 is in the first working position;

meanwhile, when the fourth triggering structure contacts with the fourth positioning switch 354 and enables the fourth positioning switch 354 to be disconnected, the controller judges that the second detection signal is that the output shaft 3621 is in the third working position; the washing machine can operate in a washing mode at this time;

when the fourth positioning switch 354 fails, the output shaft 3621 drives the first limiting portion 412 to continue rotating until the first limiting portion 412 contacts the second limiting structure a 421, and the output shaft 3621 is limited to continue rotating.

In addition, as shown in fig. 7a and 7b, the step of the washing machine entering the positioning mode includes:

when the push rod 32 is positioned between the second working position and the fifth working position, the controller controls the laundry treatment drum 1 to rotate at a low speed and starts timing, and when the timing time length T1 is close to the preset time length T10, the magnetic induction sensor 51 outputs a signal, and the controller controls the laundry treatment drum 1 to stop rotating; when the timing duration T1 exceeds the preset duration T10, the controller sends out a fault warning; the preset time period T10 is a time period required for one rotation of the laundry treating tub 1;

When the ejector rod 32 is in the fifth working position, judging whether the magnetic induction sensor 51 outputs a signal, if so, controlling the clothes processing barrel 1 to rotate and time by the controller, and when the time duration T2 is less than or equal to the preset time duration T20, changing the magnetic induction sensor 51 into not to output the signal; after the laundry treating tub 1 continues to rotate for a preset period of time T20, the blocking member 12 contacts with the positioning portion 313 to position the drain opening 11, the first sealing portion 312 is located right below the drain opening 11, and the controller controls the laundry treating tub 1 to stop rotating; if the signal is not outputted, the controller directly controls the laundry treating tub 1 to rotate for a preset time period T20; the preset time period T20 is a time period required for the water discharge opening 11 to be positioned above the first sealing portion 311 after the rotation of the laundry treating tub 1 is stopped and rotated again at a low speed.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A washing machine comprising a laundry treatment tub (1), a controller and a drain device, a drain opening (11) being formed at a tub bottom of the laundry treatment tub (1), the drain device being provided below the drain opening (11), characterized in that the drain device comprises:

A seal (31) having a first seal portion (311) for opening and closing the drain port (11);

a top of the top rod (32) is connected with the first sealing part (311) and can be controlled to move; one end of the elastic piece (361) is fixed, and the other end of the elastic piece (361) is connected with the top of the ejector rod (32);

a drive motor (362) and a traction rope (364), the drive motor (362) being formed with an output shaft (3621), the output shaft (3621) being in driving connection with a cam (363); one end of the traction rope (364) is connected with the cam (363), the other end of the traction rope (364) is connected with the bottom of the ejector rod (32), and the extending direction of the other end of the traction rope (364) is the same as the extending direction of the ejector rod (32);

the detection piece comprises a first detection unit and a second detection unit; the first detection unit is arranged on the movement path of the ejector rod (32) and is in communication connection with the controller, and is used for detecting the position of the ejector rod (32) and transmitting a first detection signal to the controller; the second detection unit is arranged on the movement path of the cam (363) and is in communication connection with the controller, and is used for detecting the position of the cam (363) and transmitting a second detection signal to the controller;

The driving motor (362) rotates forward, one end of the traction rope (364) is wound on the cam (363), the other end of the traction rope (364) drives the ejector rod (32) to move downwards, and the elastic piece (361) is compressed to store energy; the driving motor (362) rotates reversely, and the elastic piece (361) releases energy and drives the ejector rod (32) to move upwards; the controller determines the fit state of the first sealing part (311) and the drain outlet (11) according to the first detection signal and the second detection signal.

2. Laundry washing machine according to claim 1, characterized in that the ram (32) has a first operating position and a second operating position in the direction of its movement; the cam (363) has a third working position and a fourth working position in the direction of its movement;

the driving motor (362) drives the ejector rod (32) to move, and when the first detection signal is that the ejector rod (32) is in a first working position and the second detection signal is that the cam (363) is in a third working position, the first sealing part (311) and the water outlet (11) are in a contact state for sealing the water outlet (11);

when the first detection signal is that the ejector rod (32) is in the second working position and the second detection signal is that the cam (363) is in the fourth working position, the first sealing part (311) and the water outlet (11) are in a separated state for opening the water outlet (11).

3. Laundry washing machine according to claim 2, characterized in that said draining means further comprise a barrier (13) provided at the bottom of said laundry treatment tub (1); the sealing member (31) is formed with a positioning portion (313) which is matched with the blocking member (13), and the positioning portion (313) is positioned at the side part of the first sealing portion (311);

the ejector rod (32) is also provided with a fifth working position in the movement direction, and the fifth working position is positioned between the first working position and the second working position;

when the first detection signal is that the ejector rod (32) is in a fifth working position, the first sealing part (311) and the water outlet (11) are in a separated state for opening the water outlet (11), and then the positioning part (313) and the blocking piece (13) are in a contact state, and the first sealing part (311) is positioned below the water outlet (11).

4. A washing machine as claimed in claim 3, wherein the first and second detection units each comprise at least one positioning switch; the ejector rod (32) is provided with different trigger structures, and the different trigger structures of the ejector rod (32) can be matched with a positioning switch in the first detection unit; the cam (363) is formed with a trigger structure, the trigger structure of the cam (363) being cooperable with a position switch in the second detection unit.

5. The washing machine according to claim 4, wherein a third trigger structure (323), a first trigger structure (321) and a second trigger structure (322) are sequentially formed at one end of the ejector rod (32) from top to bottom along the length direction of the ejector rod (32), and the first trigger structure (321) and the second trigger structure (322) are oppositely arranged;

the first detection unit comprises a first positioning switch (351) and a second positioning switch (352), a part of the first positioning switch (351), a first triggering structure (321) and a third triggering structure (323) are arranged on the same side correspondingly, and the other part of the second positioning switch (352), a second triggering structure (322) and a third triggering structure (323) are arranged on the same side correspondingly;

the driving motor (362) drives the ejector rod (32) to move, and when the first positioning switch (351) is contacted with a first trigger structure (321) and the first positioning switch (351) is disconnected, and the second positioning switch (352) is contacted with a second trigger structure (322) and the second positioning switch (352) is disconnected, the controller judges that the first detection signal is that the ejector rod (32) is in a first working position;

when the first positioning switch (351) is in contact with the third triggering structure (323) and enables the first positioning switch (351) to be closed, and the second positioning switch (352) is in contact with the third triggering structure (323) and enables the second positioning switch (352) to be closed, the controller judges that the first detection signal is that the ejector rod (32) is in a second working position;

When the first positioning switch (351) is in contact with the third triggering structure (323) and enables the first positioning switch (351) to be closed, and the second positioning switch (352) is in contact with the second triggering structure (322) and enables the second positioning switch (352) to be opened, the controller judges that the first detection signal is that the ejector rod (32) is in a fifth working position.

6. Laundry washing machine according to claim 4, characterized in that said cam (363) has a fourth trigger structure formed thereon; the second detection unit comprises a third positioning switch (353) and a fourth positioning switch (354);

the driving motor (362) drives the cam (363) to rotate, and when the fourth positioning switch (354) contacts with a fourth triggering structure and the fourth positioning switch (354) is disconnected, the controller judges that the second detection signal is that the cam (363) is in a third working position;

when the third positioning switch (353) is in contact with a fourth triggering structure and the third positioning switch (353) is disconnected, the controller judges that the second detection signal is that the cam (363) is in a fourth working position.

7. A control method of a washing machine as claimed in any one of claims 1 to 6, characterized in that the control method comprises:

determining a position of the jack (32) corresponding to the first detection signal;

determining a position of the cam (363) corresponding to the second detection signal;

determining the matching state of the first sealing part (311) and the water outlet (11) according to the positions of the ejector rod (32) and the cam (363);

the operation of the washing machine is controlled according to the matching state of the first sealing part (311) and the water outlet (11).

8. The control method of a washing machine as claimed in claim 7, wherein the first preset signal includes a first preset signal a, a first preset signal B, and a first preset signal C; the determining the position of the jack (32) corresponding to the first detection signal includes:

comparing the first detection signal with a first preset signal;

when the first detection signal is a first preset signal A, determining that the ejector rod (32) is in a first working position;

when the first detection signal is a first preset signal B, determining that the ejector rod (32) is in a second working position;

when the first detection signal is a first preset signal C, determining that the ejector rod (32) is in a fifth working position;

The first preset signal A is that the first positioning switch (351) is contacted with the first triggering structure (321) and enables the first positioning switch (351) to be disconnected, and the second positioning switch (352) is contacted with the second triggering structure (322) and enables the second positioning switch (352) to be disconnected; the first preset signal B is that the first positioning switch (351) is contacted with the third triggering structure (323) and enables the first positioning switch (351) to be closed, and the second positioning switch (352) is contacted with the third triggering structure (323) and enables the second positioning switch (352) to be closed; the first preset signal C is that the first positioning switch (351) is contacted with the third triggering structure (323) and enables the first positioning switch (351) to be closed, and the second positioning switch (352) is contacted with the second triggering structure (322) and enables the second positioning switch (352) to be opened.

9. The control method of a washing machine as claimed in claim 8, wherein the second preset signal includes a second preset signal a and a second preset signal B; the determining the position of the cam (363) corresponding to the second detection signal includes:

comparing the second detection signal with a second preset signal;

when the second detection signal is a second preset signal A, determining that the cam (363) is in a third working position;

When the second detection signal is a second preset signal B, determining that the cam (363) is in a fourth working position;

the second preset signal A is that the fourth positioning switch (354) is contacted with the fourth triggering structure and the fourth positioning switch (354) is disconnected; the second preset signal B is that the third positioning switch (353) is contacted with the fourth triggering structure and the third positioning switch (353) is disconnected.

10. The control method of a washing machine according to claim 9, wherein the determining of the mating state of the first sealing portion (311) and the drain port (11) according to the positions of the push rod (32) and the cam (363) includes:

when the ejector rod (32) is in a first working position and the cam (363) is in a third working position, determining that the first sealing part (311) and the water outlet (11) are in a contact state for closing the water outlet (11);

when the ejector rod (32) is in the second working position and the cam (363) is in the fourth working position, determining that the first sealing part (311) and the water outlet (11) are in a separated state for opening the water outlet (11);

when the ejector rod (32) is in the fifth working position, the positioning part (313) of the sealing element (31) is in contact with the blocking element (13), and the first sealing part (311) is positioned below the water outlet (11).