CN114717796A - Control method of washing machine - Google Patents

Abstract

The invention belongs to the technical field of washing machines, and discloses a control method of a washing machine. The drain valve of the washing machine is in a normally open state, the drain opening is blocked only when water needs to be contained in the outer barrel, and the drain opening is in an open state when the washing machine is in a shutdown state, so that the sealing condition between the inner barrel and the outer barrel is reduced, the air circulation of the barrel bottom space is facilitated, and the condition that the barrel bottom space forms a damp closed environment and bacteria are easily bred is avoided.

Description

Control method of washing machine

Technical Field

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

Background

In the prior art, the upper end of a barrel assembly of a pulsator washing machine generally adopts an open structure, and after washing is completed, the open barrel opening enables the space inside the barrel to be communicated with the space outside the barrel, so that air circulation can exist, and the environment inside the barrel can reach a dry state as soon as possible. However, the part between the inner barrel and the outer barrel is relatively not beneficial to air circulation due to being narrow, the water discharge port is blocked by the water discharge valve and cannot be communicated with the outside, the space area close to the bottom of the inner barrel is relatively sealed due to the covering of the impeller cover, the air circulation effect is poor, and bacteria breeding is easily caused due to the humid environment which is difficult to ventilate.

In the washing machine having the heating function or the function of preventing bubbles from overflowing, an inner cover is generally provided on the tub assembly. After the washing is finished, the inner cover closes the space in the closed barrel, so that the ventilation in the barrel of the washing machine is not facilitated, and the time for the inside of the barrel to reach a dry state is long. The long-term wet closed state in the barrel is easy to cause bacterial breeding and dirt generation on the barrel wall, the sanitation condition of the washed clothes is influenced, and the health of a user is harmed.

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

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a control method of a washing machine with a normally-open type drain valve.

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

a control method of a washing machine comprises an outer barrel, a drainage pipeline, a drainage port and a drainage valve, wherein the drainage port is used for communicating the outer barrel with the drainage pipeline, the drainage valve is used for plugging the drainage port, the initial state of the drainage valve is a drainage port opening state, and when the washing machine receives a water inlet instruction, the drainage valve is controlled to plug the drainage port.

Further, the drain valve comprises a valve plug capable of reciprocating to open/close the drain outlet and a driving motor for driving the valve plug to move; when the washing machine receives a water inlet instruction, the driving motor drives the valve plug to move so as to seal the water outlet;

preferably, the valve plug comprises a valve rod and a sealing sleeve sleeved on the valve rod and moving along with the valve rod, the driving motor is a rotating motor, and one end of the valve rod is connected with the driving motor through a transmission assembly; the transmission assembly comprises a connecting rod and an eccentric wheel, one end of the connecting rod is hinged with one end of the valve rod, the other end of the connecting rod is hinged with an eccentric shaft of the eccentric wheel, and a central shaft of the eccentric wheel is connected to a driving motor.

Further, after the washing machine receives a water inlet instruction, the driving motor is controlled to be powered on, and the driving motor rotates to drive the valve plug to move; when the washing machine receives a signal that the valve plug is closed in place, controlling the driving motor to be powered off, stopping the driving motor from rotating, and plugging the water outlet by the valve plug;

preferably, the washing machine comprises a first position switch, when the valve plug blocks the water outlet, the first position switch is triggered to send out a signal that the valve plug is closed in place.

Further, after the driving motor is powered off, when the washing machine receives a water drainage instruction, the driving motor is controlled to be powered on again, the driving motor rotates to drive the valve plug to move, and the water drainage port is opened; when the washing machine receives a signal that the valve plug is opened in place, the driving motor is controlled to be powered off, and the driving motor stops rotating;

preferably, the washing machine further comprises a second position switch which is triggered to signal that the valve plug is open when the valve plug fully opens the drain opening.

Further, when the washing machine receives a shutdown instruction, 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 opened in place, the washing machine is powered off and enters a shutdown state.

Further, when the washing machine receives a shutdown instruction, judging whether the second position switch is in a triggered state, if so, powering off the washing machine and entering a shutdown state; otherwise, controlling the driving motor to be electrified, starting the driving motor to rotate, and when the washing machine receives the signal that the second position switch is triggered, powering off the washing machine to enter a shutdown state.

Further, when the washing machine receives a shutdown instruction, judging whether the first position switch is in a triggered state, if not, powering off the washing machine and entering a shutdown state; otherwise, controlling the driving motor to be electrified, starting the driving motor to rotate, and when the washing machine receives a signal that the second position switch is triggered, powering off the washing machine and entering a shutdown state.

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

if the difference value between the water levels detected in two adjacent times is larger than the preset water level difference value, controlling the driving motor to be electrified, and enabling the driving motor to start rotating; when the washing machine receives the signal that the valve plug is opened in place and then receives the signal that the valve plug is closed in place again, the driving motor is controlled to be powered off, and the driving motor stops rotating.

Further, the driving motor is provided with a preset blocking rotating position, and when the driving motor rotates to the blocking rotating position, the valve plug blocks the water outlet;

after the washing machine receives a water inlet instruction, the driving motor is controlled to be powered on, the driving motor starts to rotate, and when the driving motor rotates to the plugging rotating position, the driving motor is controlled to be powered off, and the driving motor stops rotating.

Further, the driving motor is also provided with a preset drainage rotating position, and when the driving motor rotates to the drainage rotating position, the valve plug completely opens the drainage outlet;

after the driving motor is powered off, when the washing machine receives a drainage instruction, the driving motor is controlled to be powered on again, the driving motor starts to rotate, and when the driving motor rotates to the drainage rotating position, the driving motor is controlled to be powered off, and the driving motor stops rotating.

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

The drain valve of the washing machine is in a normally open state, the drain opening is blocked only when water needs to be contained in the outer barrel, and the drain opening is in an open state when the washing machine is in a shutdown state, so that the sealing condition between the inner barrel and the outer barrel can be reduced, the air circulation of the barrel bottom space is facilitated, and the condition that the barrel bottom space forms a damp closed environment and bacteria are easily bred is avoided.

When the washing machine receives a shutdown instruction, the driving motor is controlled to drive the valve plug to move, when the position of the valve plug is determined to enable the water outlet to be in an open state, the washing machine is powered off to enter a shutdown state, and the valve plug is kept in a position when the washing machine is shut down. No matter what operation stage the washing machine is in before shutting down, the drainage outlet can be guaranteed to be in an open state after the washing machine is shut down, and air circulation can exist in the space at the bottom of the barrel.

The washing machine detects whether water leakage occurs or not in the washing/rinsing process, and when the water leakage occurs, the water discharge valve is opened once and closed again by controlling the rotation of the driving motor, so that the automatic elimination of the water leakage fault is realized.

The washing machine controls the power-off of the driving motor to stop rotating when the driving motor reaches the corresponding rotating position through presetting the plugging rotating position and the drainage rotating position of the driving motor, thereby realizing the control of the stopping position of the valve plug, having simple control logic and being easy to realize.

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

Drawings

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

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

FIG. 2 is a schematic view of a drain valve for plugging a drain opening according to an embodiment of the present invention;

FIG. 3 is a schematic view of the drain valve fully opening the drain port in an embodiment of the invention;

FIG. 4 is a flowchart illustrating a control method of a washing machine according to an embodiment of the present invention;

FIG. 5 is a flowchart of a control method before the washing machine is shut down according to an embodiment of the present invention;

FIG. 6 is a flowchart of a control method before the washing machine is shut down according to a second embodiment of the present invention;

FIG. 7 is a flowchart of a control method before the washing machine is shut down according to a third embodiment of the present invention;

fig. 8 is a flowchart of a control method of a washing machine according to a fourth embodiment of the present invention.

In the figure: 1. an outer tub; 2. an inner barrel; 3. a drain line; 4. an impeller; 5. an inner cover; 6. a water outlet; 100. a drain valve; 111. a drive motor; 112. a wiring terminal; 120. a valve plug; 121. a valve stem; 122. a corrugated gland; 131. a connecting rod; 132. an eccentric wheel; 601. a valve chamber wall.

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

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

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1 to 3, the washing machine according to the present embodiment includes an outer tub 1, a drain pipeline 3, a drain opening 6 for communicating the outer tub 1 with the drain pipeline 3, and a drain valve 100 for blocking the drain opening 6, wherein the drain valve 100 is in an initial state in which the drain opening 6 is open.

In this embodiment, the control method of the washing machine includes: when the washing machine receives a water inlet instruction, the water discharge valve 100 is controlled to block the water outlet 6.

The washing machine of the embodiment also comprises an inner barrel 2 arranged inside the outer barrel 1, and the bottom of the inner barrel 2 is provided with a wave wheel 4. An inner cover 5 is further installed at the opening of the outer barrel 1, when the washing machine does not work, the inner cover 5 is closed, and a relatively closed space is formed inside the outer barrel 1.

In the above scheme, by setting the drain valve 100 in the normally open state, the drain valve 100 only plugs the drain opening 6 when water needs to be contained in the outer tub 1, and in other stages, especially when the washing machine is in the shutdown state, the drain opening 6 is in the open state, and the inner space of the outer tub 1 can be communicated with the outside through the drain opening 6, thereby reducing the sealing condition inside the outer tub 1 to a certain extent. The water outlet 6 in an open state is beneficial to the air circulation inside the outer barrel 1, especially in the bottom space of the inner barrel 2 and the outer barrel 1, so that the condition that bacteria are easily bred due to the fact that a damp and completely closed environment is formed in the bottom space of the barrel can be avoided.

Since the drain valve 100 is in a state of opening the drain opening 6 when the washing machine is turned off, when a water inlet instruction is received for the first time after the washing machine is turned on, the washing machine of the present embodiment is different from the washing machine of the prior art in that water can be directly supplied, and the drain valve 100 needs to be controlled to operate to block the drain opening 6, and then water supply operation is performed.

In a further aspect of the present embodiment, the drain valve 100 includes a valve plug 120 that is reciprocally movable to open/close the drain opening 6, and a driving motor 111 that drives the valve plug 120 to move. When the washing machine receives a water inlet command, the driving motor 111 drives the valve plug 120 to move to close the water outlet 6.

The specific structure of the water discharge valve 100 in the present embodiment is as follows.

The valve plug 120 includes a valve stem 121, and a sealing sleeve fitted over 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 seal cover is a corrugated seal cover 122, the right end of the corrugated seal cover 122 is fixed at the right end of the valve rod 121, and the left end of the corrugated seal cover is in sealing fit with the wall 601 of the valve cavity. The valve rod 121 reciprocates left and right, and the corrugated sealing sleeve 122 stretches along with the movement of the valve rod 121, so that the water outlet 6 is opened and closed.

The driving motor 111 is a rotating motor, and the left end of the valve rod 121 is connected with the driving motor 111 through a transmission assembly, so as to reciprocate under the driving of the driving motor 111. The transmission assembly includes a connecting rod 131 and an eccentric wheel 132, one end of the connecting rod 131 is hinged to the left end of the valve rod 121, the other end of the connecting rod 131 is hinged to the eccentric shaft of the eccentric wheel 132, and the central shaft of the eccentric wheel 132 is connected to the driving motor 111 to rotate with the driving motor 111.

The driving motor 111 rotates to rotate the eccentric wheel 132, and the eccentric shaft of the eccentric wheel 132 rotates around the central shaft, thereby rotating the left end of the connecting rod 131 around the central shaft 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 rod 121 to reciprocate left and right, so that the valve plug 120 is driven to reciprocate left and right to open/close the water outlet 6.

As shown in fig. 4, the control method of the washing machine in the embodiment specifically includes:

after the washing machine receives a water inlet instruction, the driving motor 111 is controlled to be powered on, and the driving motor 111 rotates to drive the valve plug 120 to move;

when the washing machine receives a 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 seals the water outlet 6, and then water starts to enter.

In a preferred embodiment of this embodiment, in order to control the stop position of the valve plug 120 when the water outlet 6 is sealed, the washing machine further includes a first position switch, and when the valve plug 120 seals the water outlet 6, the first position switch is triggered to send a signal that the valve plug 120 is closed in place.

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

In a preferred embodiment of the present invention, in order to control the stop position of the valve plug 120 when the drain opening 6 is opened, the washing machine further includes a second position switch, and when the valve plug 120 completely opens the drain opening 6, that is, the valve plug 120 is in the position shown in fig. 3, the second position switch is triggered to signal that the valve plug 120 is opened.

In the above scheme, the valve plug 120 is driven to move by the power-on rotation of the driving motor 111, and when the valve plug 120 is kept at any position, the driving motor 111 does not need to rotate and can be in a power-off state. Compared with the scheme that the drain valve can only open the drain port when the power is on and block the drain port when the power is off in the prior art, the drain valve 100 in the embodiment is controlled by the independently arranged driving motor 111, the driving motor 111 is provided with the wiring terminal 112 connected with the power board and the control board of the washing machine, so that the valve plug 120 can stop moving at any position, and when the driving motor 111 is powered off, the valve plug 120 can be kept at any position, thereby realizing the purpose that the drain port 6 is in an open state when the washing machine is off.

In this embodiment, the washing machine controls the movement of the valve plug 120 by controlling the power-on and power-off of the driving motor 111, and the valve plug 120 can move to the position for blocking the water outlet 6 and keep still before water enters the washing/rinsing stage, thereby achieving the purpose of holding water in the outer tub 1. In the draining and dehydrating stage, the valve plug 120 moves to a position where the drain opening 6 is fully opened, thereby draining the tub 1. During the washing/rinsing stage, or the draining/dehydrating stage, the valve plug 120 maintains the position, and the driving motor 111 may maintain the power-off state.

As shown in fig. 5, in a further aspect of the present 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 opened in place, the washing machine is powered off and enters a shutdown state.

In the above scheme, when the washing machine receives a shutdown command, the driving motor 111 drives the valve plug 120 to move, and when the valve plug 120 moves to the position where the drain opening 6 is completely opened, the washing machine is powered off and shutdown. No matter what operation stage the washing machine is in before shutting down, the valve plug 120 can be ensured to be in the position for opening the water outlet 6 before shutting down the washing machine, and the water outlet 6 can be kept in the open state after shutting down the washing machine, so that the condition that the space in the outer barrel 1 is closed due to the fact that the water outlet 6 is closed in the shut-down state of the washing machine is avoided.

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

If the difference between the water levels detected at two adjacent times 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 scheme, the washing machine intermittently detects the water level in the outer tub 1 during the washing/rinsing process, and when the difference between the water level values detected in two adjacent times is large, it indicates that a water leakage phenomenon occurs at the water outlet 6, and the water leakage phenomenon may be caused by that foreign matters such as thread scraps, buttons and the like exist at the water outlet 6 to hinder the closing of the water discharge valve 100. At this time, the washing machine can automatically control the driving motor 111 to be powered on and rotate, so that the drain valve 100 performs the operation of opening once and closing again, and the foreign matters at the drain opening 6 are washed away, thereby completely blocking the drain opening 6 and realizing the automatic elimination of the water leakage fault.

In the preferred embodiment of the present invention, in a complete washing/rinsing stage, if the number of times of water leakage detected by the washing machine reaches N times, the washing machine stops running and gives an alarm to remind the user to manually remove the water leakage fault.

In this embodiment, the drain valve 100 of the washing machine is normally open, and only when receiving a water inlet instruction, the driving motor 111 is controlled to be powered on to drive the valve plug 120 to close the drain opening 6, and then the driving motor 111 is controlled to be powered off to stop the valve plug 120 at a position for closing the drain opening 6. Before water drainage and before shutdown, the driving motor 111 is controlled to be powered on, the valve plug 120 is moved to the position for opening the water outlet 6, and after the driving motor 111 is powered off, the valve plug 120 can be kept at the position for opening the water outlet 6, so that the opening state of the water outlet 6 can be kept when the washing machine is shutdown, and the sealing condition inside the outer barrel 1, particularly between the inner barrel 2 and the outer barrel 1, is lightened. The water outlet 6 in an open state is used for communicating the outer barrel 1 with the external space, so that the ventilation of the barrel bottom space is facilitated, and the condition that the barrel bottom space forms a damp closed environment to easily cause bacterial breeding is avoided.

Example two

As shown in fig. 1 to 3 and fig. 6, the present embodiment is different from the first embodiment in that: when the washing machine receives a shutdown instruction, the state of the second position switch is acquired first, and whether the driving motor 111 is powered on or not is controlled according to the state of the second position switch.

Specifically, when the washing machine receives a shutdown instruction, whether the second position switch is in a triggered state or not is judged. If the judgment result is yes, the washing machine is powered off and enters a shutdown state. If the judgment result is negative, the driving motor 111 is controlled to be powered on, the driving motor 111 starts to rotate, and when the washing machine receives the signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

In the above scheme, when the washing machine receives the shutdown instruction, the state of the second position switch is acquired first, and when the second position switch is in the triggered state, it indicates that the valve plug 120 is in the position of completely opening the water outlet 6 at this time, and the washing machine can be controlled to be directly powered off and shutdown, without controlling the driving motor 111 to be powered on and rotate for a complete circle and then powered off and shutdown, so that unnecessary operation of the drain valve 100 is omitted.

EXAMPLE III

As shown in fig. 1 to 3 and 7, the present embodiment is different from the first embodiment in that: when the washing machine receives a shutdown instruction, the state of the first position switch is acquired first, and whether the driving motor 111 is powered on or not is controlled according to the state of the first position switch.

Specifically, when the washing machine receives a shutdown instruction, whether the first position switch is in a triggered state or not is judged. If the judgment result is negative, the washing machine is powered off and enters a shutdown state. If the judgment result is yes, the driving motor 111 is controlled to be powered on, the driving motor 111 starts to rotate, and when the washing machine receives the signal that the second position switch is triggered, the washing machine is powered off and enters a shutdown state.

In the above scheme, when the washing machine receives a shutdown instruction, the state of the first position switch is obtained first, and when the first position switch is in a non-triggered state, it indicates that the water outlet 6 is not blocked by the valve plug 120 at this time, so that the washing machine can be controlled to be directly powered off and shut down. Even if the valve plug 120 is not in the position of fully opening the drain opening 6 at this time, the inside of the tub 1 can be communicated with the external space through the partially opened drain opening 6, and a closed space is not formed in the tub 1.

Only when the first position switch is triggered, that is, the water outlet 6 is blocked by the valve plug 120, and when the two sides of the water outlet 6 are not communicated completely, the washing machine controls the driving motor 111 to be powered on and rotate, so as to drive the valve plug 120 to move to the position where the water outlet 6 is completely opened, and then the washing machine is powered off to shut down, so that the water outlet 6 is not blocked by the drain valve 100 when the washing machine is shut down, and air circulation can exist in the bottom space of the bucket.

Example four

As shown in fig. 1 to 3 and 8, the present embodiment is different from the first embodiment in that: the washing machine is not provided with the first position switch and the second position switch, and the rotation position of the driving motor 111 is preset, so that the driving motor 111 is controlled to be powered off and stop rotating when rotating to reach the corresponding rotation position, and the stop movement position of the valve plug 120 is controlled.

Specifically, the drive motor 111 has a preset blocking rotational position to which the valve plug 120 blocks the drain opening 6 when the drive motor 111 is rotated.

After the washing machine receives the water inlet instruction, the driving motor 111 is controlled to be powered on, and the driving motor 111 starts to rotate. When the driving motor 111 rotates to the plugging 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 along with the stopping of the driving motor to plug the water outlet 6.

Further, the driving motor 111 also has a preset drain rotating position to which the valve stopper 120 fully opens the drain port 6 when the driving motor 111 is rotated.

After the driving motor 111 is powered off, when the washing machine receives a water discharging instruction, the driving motor 111 is controlled to be powered on again, and the driving motor 111 starts to rotate. When the driving motor 111 rotates to the drainage 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 along with the rotation, so that the drainage port 6 is completely opened.

In this embodiment, the washing machine is not provided with the first position switch and the second position switch for detecting the movement position of the valve plug 120, so that the structure of the washing machine is simplified. Through presetting shutoff rotational position and drainage rotational position, control its outage when driving motor 111 reaches corresponding rotational position, make its stall to realized the control to valve plug 120 stop position, control logic is simple, easily realizes.

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

Claims (10)

1. The control method of the washing machine is characterized in that the initial state of the drain valve is the open state of the drain outlet, and when the washing machine receives a water inlet instruction, the drain valve is controlled to plug the drain outlet.

2. The control method of a washing machine as claimed in claim 1, wherein the drain valve includes a valve stopper reciprocally movable to open/close the drain opening, and a driving motor driving the valve stopper to move; when the washing machine receives a water inlet instruction, the driving motor drives the valve plug to move so as to seal the water outlet;

preferably, the valve plug comprises a valve rod and a sealing sleeve sleeved on the valve rod and moving along with the valve rod, the driving motor is a rotating motor, and one end of the valve rod is connected with the driving motor through a transmission assembly; the transmission assembly comprises a connecting rod and an eccentric wheel, one end of the connecting rod is hinged with one end of the valve rod, the other end of the connecting rod is hinged with an eccentric shaft of the eccentric wheel, and a central shaft of the eccentric wheel is connected to a driving motor.

3. The control method of the washing machine as claimed in claim 2, wherein the washing machine controls the driving motor to be powered on after receiving the water inlet command, and the driving motor rotates to drive the valve plug to move; when the washing machine receives a signal that the valve plug is closed in place, the driving motor is controlled to be powered off, the driving motor stops rotating, and the valve plug blocks the water outlet;

preferably, the washing machine comprises a first position switch which is triggered to signal that the valve plug is closed when the valve plug blocks the water outlet.

4. The control method of the washing machine as claimed in claim 3, wherein after the driving motor is powered off, when the washing machine receives a water discharge command, the driving motor is controlled to be powered on again, and the driving motor rotates to drive the valve plug to move, so as to open the water discharge port; when the washing machine receives a signal that the valve plug is opened in place, the driving motor is controlled to be powered off, and the driving motor stops rotating;

preferably, the washing machine further comprises a second position switch which is triggered to signal that the valve plug is open when the valve plug fully opens the drain opening.

5. The control method of a washing machine according to claim 4, wherein 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 opened in place, the washing machine is powered off and enters a shutdown state.

6. The control method of the washing machine as claimed in claim 4, wherein when the washing machine receives a power-off command, it is determined whether the second position switch is in a triggered state, and if so, the washing machine is powered off and enters a power-off state; otherwise, controlling the driving motor to be electrified, starting the driving motor to rotate, and when the washing machine receives the signal that the second position switch is triggered, powering off the washing machine to enter a shutdown state.

7. The control method of the washing machine as claimed in claim 4, wherein when the washing machine receives a power-off command, it is determined whether the first position switch is in a triggered state, and if the determination result is no, the washing machine is powered off to enter a power-off state; otherwise, controlling the driving motor to be electrified, starting the driving motor to rotate, and when the washing machine receives the signal that the second position switch is triggered, powering off the washing machine to enter a shutdown state.

8. The control method of a washing machine according to any one of claims 4 to 7, wherein the washing machine further comprises a water level detecting device which detects a water level in the outer tub every a preset time period during the washing/rinsing process;

if the difference value between the water levels detected in two adjacent times is larger than the preset water level difference value, controlling the driving motor to be electrified, and enabling the driving motor to start rotating; when the washing machine receives the signal that the valve plug is opened in place and then receives the signal that the valve plug is closed in place again, the driving motor is controlled to be powered off, and the driving motor stops rotating.

9. The control method of a washing machine as claimed in claim 2, wherein the driving motor has a predetermined blocking rotational position, and the valve plug blocks the drain opening when the driving motor rotates to the blocking rotational position;

after the washing machine receives a water inlet instruction, the driving motor is controlled to be powered on, the driving motor starts to rotate, and when the driving motor rotates to the plugging rotating position, the driving motor is controlled to be powered off, and the driving motor stops rotating.

10. The control method of a washing machine as claimed in claim 9, wherein the driving motor further has a preset drain rotation position to which the valve plug completely opens the drain port when the driving motor is rotated;

after the driving motor is powered off, when the washing machine receives a drainage instruction, the driving motor is controlled to be powered on again, the driving motor starts to rotate, and when the driving motor rotates to the drainage rotating position, the driving motor is controlled to be powered off, and the driving motor stops rotating.

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