WO2022143250A1

WO2022143250A1 - Method for controlling washing machine

Info

Publication number: WO2022143250A1
Application number: PCT/CN2021/139576
Authority: WO
Inventors: 吕艳芬; 许升
Original assignee: 青岛海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2021-01-04
Filing date: 2021-12-20
Publication date: 2022-07-07
Also published as: CN114717796A

Abstract

A method for controlling a washing machine. The washing machine comprises an outer tub (1), a water discharge pipeline (3), and a water discharge port (6) enabling communication between the outer tub (1) and the water discharge pipeline (3). The washing machine further comprises a water discharge valve (100) for sealing the water discharge port (6), the initial state of the water discharge valve (100) is an open state of the water discharge port (6), and when the washing machine receives a water intake instruction, the water discharge valve (100) is controlled to seal the water discharge port (6).

Description

A method of controlling a washing machine

technical field

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

Background technique

In the prior art, the upper end of the tub assembly of the pulsator washing machine generally adopts an open structure. After the washing is completed, the open tub mouth connects the space inside the tub with the space outside the tub, so that there can be air circulation, so that the environment in the tub can be reached as soon as possible. dry state. However, the part between the inner barrel and the outer barrel is relatively unfavorable for air circulation due to its narrowness. The drain port is blocked by the drain valve and cannot communicate with the outside world, and the space area near the bottom of the inner barrel is relatively closed due to the cover of the pulsator cover. , the air circulation effect is poor, and it is easy to cause the growth of bacteria due to the humid environment caused by difficult ventilation.

For a washing machine with a heating function or a function of preventing foam from overflowing, an inner cover is generally added to the barrel assembly. After the washing is completed, the inner cover is closed to seal the space in the tub, which is not conducive to the ventilation in the tub of the washing machine, and it takes a long time for the tub to reach a dry state. The long-term wet and closed state of the bucket is likely to cause bacterial growth and contamination on the bucket wall, affecting the hygiene of the laundry and endangering the health of users.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a control method for a washing machine with a normally open drain valve. Keep the drain opening open to facilitate air circulation in the bottom space of the bucket.

In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:

A control method of a washing machine, the washing machine includes an outer tub and a drainage pipeline, a drainage port connecting the outer tub and the drainage pipeline, and a drainage valve for blocking the drainage outlet, the drainage valve is in an initial state When the water outlet is in an open state, the washing machine controls the water outlet valve to block the water outlet when the washing machine receives a water inlet command.

Further, the drain valve includes a valve plug that can reciprocate to open/block the drain outlet, and a drive motor that drives the valve plug to move; when the washing machine receives a water intake command, the drive motor drives the valve plug to move to block said drain;

Preferably, the valve plug includes a valve stem and a sealing sleeve sleeved on the valve stem to move with the valve stem, the drive motor is a rotary motor, and one end of the valve stem is connected to the drive motor through a transmission assembly; the The transmission assembly includes a connecting rod and an eccentric wheel, one end of the connecting rod is hinged with one end of the valve stem, the other end of the connecting rod is hinged with the eccentric shaft of the eccentric wheel, and the central shaft of the eccentric wheel is connected to the drive motor.

Further, after the washing machine receives the water inlet command, it controls the drive motor to power on, and the drive motor rotates to drive the valve plug to move; when the washing machine receives the signal that the valve plug is closed in place, it controls the drive motor to power off, the drive motor stops rotating, and the valve plug is turned off. blocking said drain;

Preferably, the washing machine includes a first position switch, and when the valve plug blocks the drain, the first position switch is triggered to send a signal that the valve plug is closed in place.

Further, after the drive motor is powered off, when the washing machine receives the drain command, the drive motor is controlled to be powered on again, the drive motor rotates to drive the valve plug to move, and the drain port is opened; when the washing machine receives the signal that the valve plug is in place, it controls the drive motor. When the motor is powered off, the drive motor stops rotating;

Preferably, the washing machine further comprises a second position switch, when the valve plug fully opens the water outlet, the second position switch is triggered to send a signal that the valve plug is fully opened.

Further, when the washing machine receives a shutdown command, the driving motor is controlled to be powered on, and the driving motor starts to rotate; when the washing machine receives a signal that the valve plug is in place, the washing machine is powered off and enters the shutdown state.

Further, when the washing machine receives the shutdown command, it is judged whether the second position switch is in a triggered state. If the judgment result is yes, the washing machine is powered off and enters the shutdown state; otherwise, the drive motor is controlled to be powered on, and the drive motor starts to rotate. When the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

Further, when the washing machine receives the shutdown instruction, it is judged whether the first position switch is in a triggered state, and if the judgment result is no, the washing machine is powered off and enters the shutdown state; otherwise, the drive motor is controlled to be powered on, and the drive motor starts to rotate. When the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

Further, the washing machine further includes a water level detection device, and during the washing/rinsing process, the water level detection device detects the water level in the outer tub every preset time period;

If the difference between the two adjacent detected water levels is greater than the preset water level difference, the drive motor is controlled to be powered on, and the drive motor starts to rotate; after the washing machine receives the signal that the valve plug is opened in place, it receives the valve plug closed in place again. When the signal is received, the control drive motor is powered off and the drive motor stops rotating.

Further, the driving motor has a preset blocking rotation position, and when the driving motor rotates to the blocking rotation position, the valve plug blocks the water outlet;

After the washing machine receives the water inlet command, it controls the drive motor to be powered on, and the drive motor starts to rotate. When the drive motor rotates to the blocking rotation position, the control drive motor is powered off and the drive motor stops rotating.

Further, the drive motor also has a preset drain rotation position, and when the drive motor rotates to the drain rotation position, the valve plug fully opens the drain port;

After the drive motor is powered off, when the washing machine receives the drain command, it controls the drive motor to power on again, and the drive motor starts to rotate. When the drive motor rotates to the drain rotation position, the control drive motor is powered off and the drive motor stops rotating.

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

The drain valve of the washing machine of the present invention is in a normally open state, and the drain port is blocked only when the outer tub needs to hold water. When the washing machine is in a shutdown state, the drain port is in an open state, which can reduce the sealing between the inner tub and the outer tub. It is beneficial to the air circulation of the space at the bottom of the barrel, thereby avoiding the formation of a humid and closed environment in the space at the bottom of the barrel, which is easy to cause bacteria to breed.

The washing machine of the present invention controls the drive motor to drive the valve plug to move when receiving the shutdown command, and when it is determined that the valve plug is located so that the water outlet is in an open state, the power is turned off again and enters the shutdown state. At this time, the valve plug remains in the shutdown state. The position does not move. No matter what stage of operation the washing machine is in before it is turned off, it can be ensured that the water outlet is open after the washing machine is turned off, so that air circulation can exist in the space at the bottom of the tub.

The washing machine of the present invention detects whether water leakage occurs during the washing/rinsing process, and when water leakage occurs, the drain valve is opened and closed again by controlling the rotation of the driving motor, thereby realizing automatic elimination of the water leakage fault.

The washing machine of the present invention presets the blocking rotation position and the drainage rotation position of the driving motor, and controls the power off of the driving motor when it reaches the corresponding rotation position to stop the rotation, thereby realizing the control of the stop position of the valve plug, and the control logic Simple and easy to implement.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

1 is a schematic structural diagram of a washing machine in an embodiment of the present invention;

2 is a schematic diagram of a drain valve blocking a drain in an embodiment of the present invention;

3 is a schematic diagram of the drain valve fully opening the drain port in the embodiment of the present invention;

4 is a flowchart of a control method of a washing machine in Embodiment 1 of the present invention;

5 is a flowchart of a control method before the washing machine is shut down in Embodiment 1 of the present invention;

6 is a flowchart of a control method before the washing machine is shut down in Embodiment 2 of the present invention;

7 is a flowchart of a control method before the washing machine is shut down in Embodiment 3 of the present invention;

8 is a flowchart of a control method of a washing machine in Embodiment 4 of the present invention.

In the picture: 1. Outer barrel; 2. Inner barrel; 3. Drainage pipeline; 4. Pulsator; 5. Inner cover; 6. Drain outlet; 100, Drain valve; 111, Drive motor; 112, Wiring terminal; 120, Valve plug; 121, valve stem; 122, corrugated sealing sleeve; 131, connecting rod; 132, eccentric wheel; 601, valve cavity wall.

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

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used 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 orientation or positional relationship indicated by the terms "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

As shown in FIG. 1 to FIG. 3 , the washing machine described in this embodiment includes an outer tub 1 and a drain line 3 , a drain port 6 connecting the outer tub 1 and the drain line 3 , and a drain port 6 for blocking the drain port 6 . The initial state of the drain valve 100 is that the drain port 6 is open.

In this embodiment, the control method of the washing machine includes: when the washing machine receives a water intake instruction, controlling the drain valve 100 to block the drain port 6 .

The washing machine of this embodiment further includes an inner tub 2 disposed inside the outer tub 1 , and a pulsator 4 is disposed at the bottom of the inner tub 2 . An inner cover 5 is also installed at the mouth of the outer tub 1 . When the washing machine is not in operation, the inner cover 5 is closed, and a relatively closed space is formed inside the outer tub 1 .

In the above solution, by setting the drain valve 100 in a normally open state, the drain valve 100 blocks the drain port 6 only when the outer tub 1 needs to hold water. In the open state, the inner space of the outer tub 1 can be communicated with the outside through the drain port 6 , which reduces the closed condition inside the outer tub 1 to a certain extent. The open water outlet 6 is conducive to the air circulation inside the outer tub 1, especially in the bottom space of the inner tub 2 and the outer tub 1, so as to prevent the bottom space of the tub from forming a humid and completely closed environment, which is easy to cause bacteria to breed.

Since the drain valve 100 is in the state of opening the drain port 6 when the washing machine is turned off, the washing machine in this embodiment can directly feed water, unlike the washing machine in the prior art, when the water inlet command is received for the first time after the washing machine is turned on. However, it is necessary to control the action of the drain valve 100 first to block the drain port 6, and then perform the water inlet operation.

In a further solution of this embodiment, the drain valve 100 includes a valve plug 120 that can reciprocate to open/block the drain port 6 , and a driving motor 111 that drives the valve plug 120 to move. When the washing machine receives a water intake command, the drive motor 111 drives the valve plug 120 to move to block the drain port 6 .

The specific structure of the drain valve 100 in this embodiment is as follows.

The valve plug 120 includes a valve stem 121 and a sealing sleeve sleeved on the valve stem 121 to move with the valve stem 121 . The valve plug 120 is limited in the valve cavity and can only slide left and right under the guidance of the valve cavity wall 601 . The sealing sleeve is a bellows sealing sleeve 122 , the right end of the bellows sealing sleeve 122 is fixed on the right end of the valve stem 121 , and the left end is in sealing contact with the valve cavity wall 601 . The valve stem 121 reciprocates left and right, and the corrugated sealing sleeve 122 expands and contracts with the movement of the valve stem 121 to realize the opening and blocking of the water outlet 6 .

The drive motor 111 is a rotary motor, and the left end of the valve stem 121 is connected to the drive motor 111 through a transmission assembly, so as to reciprocate under the drive of the drive motor 111 . The transmission assembly includes a connecting rod 131 and an eccentric wheel 132. One end of the connecting rod 131 is hinged with the left end of the valve stem 121, and the other end of the connecting rod 131 is hinged with the eccentric shaft of the eccentric wheel 132. The central shaft of the eccentric wheel 132 is connected to the drive. On the motor 111, it rotates with the driving motor 111.

The rotation of the driving motor 111 drives the eccentric wheel 132 to rotate, the eccentric shaft of the eccentric wheel 132 rotates around the central axis, and drives the left end of the connecting rod 131 to rotate around the central axis of the eccentric wheel 132 . Because the valve plug 120 is limited in the valve cavity, the right end of the connecting rod 131 drives the left end of the valve stem 121 to reciprocate left and right, thereby driving the valve plug 120 to reciprocate left and right to open/block the drain port 6 .

As shown in Figure 4, the control method of the washing machine in this embodiment specifically includes:

After the washing machine receives the water inlet command, it controls the drive motor 111 to power on, and the drive motor 111 rotates to drive the valve plug 120 to move;

When the washing machine receives the signal that the valve plug 120 is closed in place, the driving motor 111 is controlled to be powered off, the driving motor 111 stops rotating, the valve plug 120 blocks the drain port 6, and then water starts to enter.

In the preferred solution of this embodiment, in order to control the stop position of the valve plug 120 when the drain port 6 is blocked, the washing machine further includes a first position switch. When the valve plug 120 blocks the drain port 6, the first position switch is The position switch is activated, signaling that the valve plug 120 is closed in place.

Further, after the drive motor 111 is powered off, when the washing machine receives a drain command, the drive motor 111 is controlled to be powered on again, and the drive motor 111 rotates to drive the valve plug 120 to move and open the drain port 6 . When the washing machine receives a signal that the valve plug 120 is in place, the driving motor 111 is controlled to be powered off, and the driving motor 111 stops rotating.

In the preferred solution of this embodiment, in order to control the stop position of the valve plug 120 when the drain port 6 is opened, the washing machine further includes a second position switch. When the valve plug 120 fully opens the drain port 6, that is, the valve plug 120 is in the In the position shown in FIG. 3 , the second position switch is activated to signal that the valve plug 120 is opened in place.

In the above solution, the valve plug 120 is driven to move by the power-on rotation of the drive motor 111. When the valve plug 120 remains stationary at any position, the drive motor 111 does not need to rotate and can be in a power-off state. Compared with the solution in the prior art that the drain valve can only open the drain port when the power is turned on, and block the drain port when the power is off, the drain valve 100 in this embodiment is controlled by a separately provided drive motor 111, and the drive motor 111 has the same The connection terminal 112 connecting the power supply board and the control board of the washing machine enables the valve plug 120 to stop moving at any position. When the driving motor 111 is powered off, the valve plug 120 can be maintained at any position, thereby realizing that the water outlet 6 is in the position when the washing machine is turned off. The purpose of the open state.

In this embodiment, the washing machine controls the movement of the valve plug 120 by controlling the power-on and power-off of the drive motor 111, and the valve plug 120 can move to the position of blocking the drain port 6 before water is fed in the washing/rinsing stage and remain in place. move, to achieve the purpose of the outer bucket 1 containing water. In the drainage and dehydration stage, the valve plug 120 moves to the position where the drainage port 6 is fully opened, so as to realize the drainage of the outer tub 1 . During the washing/rinsing phase, or the draining/spinning phase, the valve plug 120 remains in the same position, and the drive motor 111 can remain powered off.

As shown in FIG. 5 , in a further solution of this embodiment, when the washing machine receives a shutdown command, the driving motor 111 is controlled to be powered on, and the driving motor 111 starts to rotate. When the washing machine receives a signal that the valve plug 120 is in place, the washing machine is powered off and enters a shutdown state.

In the above solution, the washing machine first drives the valve plug 120 to move through the driving motor 111 when receiving the shutdown command, and when the valve plug 120 moves to the position where the water outlet 6 is fully opened, the washing machine is powered off again. No matter what operating stage the washing machine is in before the washing machine is turned off, it can ensure that the valve plug 120 is in the position to open the drain port 6 before the washing machine is turned off. Closed, resulting in a situation where the space in the outer tub 1 is closed.

In a further solution of this embodiment, the washing machine further includes a water level detection device, and during the washing/rinsing process, the water level detection device detects the water level in the outer tub 1 every preset time period.

If the difference between the two adjacent detected water levels is greater than the preset water level difference, the driving motor 111 is controlled to be powered on, and the driving motor 111 starts to rotate. When the washing machine receives the signal that the valve plug 120 is opened in place and then receives the signal that the valve plug 120 is closed in place again, the driving motor 111 is controlled to be powered off, and the driving motor 111 stops rotating.

In the above solution, the washing machine intermittently detects the water level in the outer tub 1 during the washing/rinsing process. When the water level values detected in two adjacent times are quite different, it means that a water leakage phenomenon occurs at the drain outlet 6, and the water leakage phenomenon may be It is caused by the existence of foreign objects such as lint, buttons, etc. at the drain port 6, which hinder the closing of the drain valve 100. At this time, the washing machine can automatically control the driving motor 111 to turn on and turn on, so that the drain valve 100 performs an operation of opening and closing again, and the foreign matter at the drain port 6 is washed away, so that the drain port 6 can be completely blocked and water leakage is realized. Automatic troubleshooting of faults.

In the preferred solution of this embodiment, in a complete washing/rinsing stage, if the washing machine detects N times of water leakage, the washing machine suspends operation and issues an alarm to remind the user to manually eliminate the water leakage fault.

In this embodiment, the drain valve 100 of the washing machine is in a normally open state. Only when the water inlet command is received, the valve plug 120 is powered on to drive the valve plug 120 to block the drain port 6, and then the drive motor 111 is powered off to make the valve plug 120 stays at the position where the drain port 6 is blocked. The drive motor 111 is controlled to be powered on before draining and before shutting down, so that the valve plug 120 moves to the position where the drain port 6 is opened. When the washing machine is turned off, the drain port 6 can be kept in an open state, which reduces the sealing condition inside the outer tub 1 , especially between the inner tub 2 and the outer tub 1 . The open water outlet 6 makes the outer tub 1 communicate with the external space, which is beneficial to the air circulation in the bottom space of the tub, thereby avoiding the formation of a humid and closed environment in the bottom space of the tub, which is easy to cause bacteria to breed.

Embodiment 2

As shown in FIG. 1 to FIG. 3 and FIG. 6 , the difference between this embodiment and the above-mentioned first embodiment is that when the washing machine receives a shutdown command, the state of the second position switch is obtained first, and the driving is controlled according to the state of the second position switch. Whether the motor 111 is powered on.

Specifically, when the washing machine receives a shutdown instruction, it is determined whether the second position switch is in a triggered state. If the judgment result is yes, the washing machine is powered off and enters a shutdown state. If the judgment result is no, the driving motor 111 is controlled to be powered on, and the driving motor 111 starts to rotate. When the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

In the above solution, the washing machine first obtains the state of the second position switch when receiving the shutdown command. When the second position switch is triggered, it means that the valve plug 120 is in the position to fully open the drain port 6 at this time, and can control the The washing machine is directly powered off and shut down without the need to control the drive motor 111 to power on and rotate for a complete week before powering off and shutting down, eliminating unnecessary operations of the drain valve 100 .

Embodiment 3

As shown in FIG. 1 to FIG. 3 and FIG. 7 , the difference between this embodiment and the above-mentioned first embodiment is that when the washing machine receives a shutdown command, the state of the first position switch is obtained first, and the driving is controlled according to the state of the first position switch. Whether the motor 111 is powered on.

Specifically, when the washing machine receives a shutdown instruction, it is determined whether the first position switch is in a triggered state. If the judgment result is no, the washing machine is powered off and enters the shutdown state. If the judgment result is yes, the driving motor 111 is controlled to be powered on, and the driving motor 111 starts to rotate. When the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

In the above solution, the washing machine first obtains the state of the first position switch when receiving the shutdown command. When the first position switch is in a non-triggered state, it means that the valve plug 120 does not block the drain port 6 at this time, and the washing machine can be controlled to directly shut off Power off. Even if the valve plug 120 is not in the position to fully open the drain port 6 at this time, the inside of the outer tub 1 can communicate with the external space through the partially opened drain port 6 , and no closed space is formed in the outer tub 1 .

Only when the first position switch is in the triggered state, that is, the drain port 6 is blocked by the valve plug 120 and the two sides of the drain port 6 are completely disconnected, the washing machine controls the driving motor 111 to turn on and drive the valve plug 120 to move to In the position where the drain port 6 is fully opened, the power is turned off again to ensure that the drain port 6 is not blocked by the drain valve 100 during shutdown, so that air circulation can exist in the bottom space of the bucket.

Embodiment 4

As shown in FIG. 1 to FIG. 3 and FIG. 8 , the difference between this embodiment and the above-mentioned first embodiment is that the first position switch and the second position switch are not provided in the washing machine. When the rotation of the motor 111 reaches the corresponding rotation position, the motor 111 is controlled to be powered off to stop the rotation, so as to realize the control of the stop movement position of the valve plug 120 .

Specifically, the driving motor 111 has a preset blocking rotation position, and when the driving motor 111 rotates to the blocking rotation position, the valve plug 120 blocks the drain port 6 .

After the washing machine receives the water intake command, it controls the drive motor 111 to power on, and the drive motor 111 starts to rotate. When the driving motor 111 rotates to the blocking rotation position, the driving motor 111 is controlled to be powered off, the driving motor 111 stops rotating, and the valve plug 120 stops moving accordingly, blocking the drain port 6 .

Further, the drive motor 111 also has a preset drain rotation position. When the drive motor 111 rotates to the drain rotation position, the valve plug 120 fully opens the drain port 6 .

After the drive motor 111 is powered off, when the washing machine receives a drain command, the drive motor 111 is controlled to be powered on again, and the drive motor 111 starts to rotate. When the drive motor 111 rotates to the drain rotation position, the drive motor 111 is controlled to be powered off, the drive motor 111 stops rotating, and the valve plug 120 stops moving accordingly, so that the drain port 6 is fully opened.

In this embodiment, the first position switch and the second position switch for detecting the movement position of the valve plug 120 are no longer provided in the washing machine, which simplifies the structure of the washing machine. By presetting the blocking rotation position and the drainage rotation position, when the driving motor 111 reaches the corresponding rotation position, the power is controlled to stop the rotation, thereby realizing the control of the stop position of the valve plug 120. The control logic is simple and easy to implement.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims

A control method of a washing machine, the washing machine includes an outer tub and a drainage pipeline, a drainage port connecting the outer tub and the drainage pipeline, and a drainage valve for blocking the drainage outlet, characterized in that the The initial state of the drain valve is an open state of the drain port, and when the washing machine receives a water intake command, the drain valve is controlled to block the drain port.
The control method of a washing machine according to claim 1, wherein the drain valve comprises a valve plug that can reciprocate to open/block the drain port, and a driving motor that drives the valve plug to move; When the water is instructed, the drive motor drives the valve plug to move to block the water outlet;

Preferably, the valve plug includes a valve stem and a sealing sleeve sleeved on the valve stem to move with the valve stem, the drive motor is a rotary motor, and one end of the valve stem is connected to the drive motor through a transmission assembly; the The transmission assembly includes a connecting rod and an eccentric wheel, one end of the connecting rod is hinged with one end of the valve stem, the other end of the connecting rod is hinged with the eccentric shaft of the eccentric wheel, and the central shaft of the eccentric wheel is connected to the drive motor.
The method for controlling a washing machine according to claim 2, wherein after the washing machine receives the water inlet command, it controls the drive motor to power on, and the drive motor rotates to drive the valve plug to move; when the washing machine receives the signal that the valve plug is closed in place, Control the power off of the drive motor, the drive motor stops rotating, and the valve plug blocks the water outlet;

Preferably, the washing machine includes a first position switch, and when the valve plug blocks the water outlet, the first position switch is triggered to send a signal that the valve plug is closed in place.
The method for controlling a washing machine according to claim 3, wherein after the drive motor is powered off, when the washing machine receives a drain command, the drive motor is controlled to be powered on again, and the drive motor rotates to drive the valve plug to move to open the drain; When the washing machine receives the signal that the valve plug is in place, it controls the drive motor to power off and the drive motor stops rotating;

Preferably, the washing machine further comprises a second position switch, when the valve plug fully opens the water outlet, the second position switch is triggered to send a signal that the valve plug is fully opened.
The method for controlling a washing machine according to claim 4, wherein when the washing machine receives a shutdown command, the drive motor is controlled to be powered on, and the drive motor starts to rotate; when the washing machine receives a signal that the valve plug is in place, the washing machine is powered off Enter the shutdown state.
The method for controlling a washing machine according to claim 4, wherein when the washing machine receives a shutdown command, it is judged whether the second position switch is in a triggered state, and if the judgment result is yes, the washing machine is powered off and enters a shutdown state; Otherwise, the driving motor is controlled to be powered on, the driving motor starts to rotate, and when the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.
The method for controlling a washing machine according to claim 4, wherein when the washing machine receives a shutdown command, it is judged whether the first position switch is in a triggered state, and if the judgment result is no, the washing machine is powered off and enters a shutdown state; Otherwise, the driving motor is controlled to be powered on, the driving motor starts to rotate, and when the washing machine receives a signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.
The control method of a washing machine according to any one of claims 4-7, wherein the washing machine further comprises a water level detection device, and during the washing/rinsing process, the water level detection device detects external the water level in the bucket;

If the difference between the two adjacent detected water levels is greater than the preset water level difference, the drive motor is controlled to be powered on, and the drive motor starts to rotate; after the washing machine receives the signal that the valve plug is opened in place, it receives the valve plug closed in place again. When the signal is received, the control drive motor is powered off and the drive motor stops rotating.
The control method of a washing machine according to claim 2, wherein the driving motor has a preset blocking rotation position, and when the driving motor rotates to the blocking rotation position, a valve plug blocks the drain port ;

After the washing machine receives the water inlet command, it controls the drive motor to be powered on, and the drive motor starts to rotate. When the drive motor rotates to the blocking rotation position, the control drive motor is powered off and the drive motor stops rotating.
The control method of a washing machine according to claim 9, wherein the drive motor further has a preset drain rotation position, and when the drive motor rotates to the drain rotation position, the valve plug fully opens the drain port;

After the drive motor is powered off, when the washing machine receives the drain command, it controls the drive motor to power on again, and the drive motor starts to rotate. When the drive motor rotates to the drain rotation position, the control drive motor is powered off and the drive motor stops rotating.