A washing machine and a control method thereof

Abstract

This application provides a washing machine and its control method, relating to the field of household appliance technology. The washing machine can activate a defoaming program when excessive foam affects spin-drying, ensuring normal spin-drying. The washing machine includes a motor, a drain pump, and a controller. The controller is configured to: control the motor speed to decrease to the first preset speed and shut off the drain pump when the washing machine's power reaches its rated power, the deviation between the washing machine's motor speed and a second preset speed is greater than a preset difference, and the increase in motor speed within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed; if, during the process of maintaining the first preset speed, the washing machine's power is higher than the power before the motor speed decreased to the first preset speed, the washing machine's water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or the motor speed is unstable, the washing machine is controlled to activate the defoaming program.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a washing machine and its control method. Background Technology

[0002] Existing washing machines may experience problems during the spin-drying process, where excessive foam inside the machine can cause the motor to reach its power limit. This can result in the motor's actual rotation speed falling short of the set speed, leading to poor rinsing performance after spin-drying. Summary of the Invention

[0003] This application provides a washing machine and its control method. When the washing machine's power reaches its maximum but its rotation speed does not reach the rated speed, the washing machine is defoamed, which can solve the problem of excessive foam in the washing machine and thus improve the rinsing effect of the washing machine after spin-drying.

[0004] In a first aspect, this application provides a washing machine, comprising:

[0005] The motor is used to control the rotation of the washing machine drum;

[0006] A drain pump is used to drain water from the washing machine drum.

[0007] The controller is configured to: when the washing machine experiences a first abnormal condition, control the motor speed to decrease to a first preset speed and shut off the drain pump. The first abnormal condition indicates that the washing machine's power reaches its rated power, the deviation between the motor speed and a second preset speed is greater than a preset difference, and the increase in motor speed within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed. If the washing machine experiences a second abnormal condition while the motor speed is maintained at the first preset speed, the controller activates the defoaming program. The defoaming program is used to eliminate foam in the washing machine; the second abnormal condition indicates that the washing machine's power is higher than the power before the motor speed decreased to the first preset speed, the washing machine's water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or the motor speed is unstable, or one or more of these conditions apply.

[0008] The technical solution provided in this application brings at least the following beneficial effects: When the washing machine's power reaches its rated power, the deviation between the motor speed and the second preset speed is greater than a preset difference, and the increase in motor speed within a first preset time period is less than the preset difference, the motor speed decreases to the first preset speed. When the washing machine's power reaches its rated power, but the actual motor speed does not reach the rated speed, the motor speed is reduced in time to reduce motor power consumption and prevent the washing machine from exceeding the power consumption limit. During the process of maintaining the first preset speed, if the washing machine's power is higher than the power before the motor speed decreased to the first preset speed, the washing machine's water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or the motor speed is unstable, the washing machine starts the defoaming program. Through the defoaming program, the problem of excessive foam in the washing machine can be solved, thereby solving the problem that excessive foam in the washing machine during spin-drying causes the motor to reach its power limit, further leading to the motor's actual speed not reaching the set speed, and finally resulting in poor rinsing effect after spin-drying.

[0009] In some embodiments, the controller of the washing machine is further configured to control the washing machine to start a first water inlet program after a second preset time period following the shutdown of the drain pump. The duration of the first water inlet program is a third preset time period. After the first water inlet program ends, the controller controls the washing machine to start a drain program, which drains the washing machine to the empty tub level. In this embodiment, water inlet can eliminate foam in the washing machine, and draining to the empty tub level can prevent the washing machine from spinning with water still inside.

[0010] In some embodiments, the washing machine controller is further configured to control the drain pump to shut off and the washing machine to start a first static cycle after the draining cycle is completed. The first static cycle indicates that the motor maintains a first preset speed, and the washing machine does not perform water intake or drainage; the duration of the first static cycle is a fourth preset duration. In this embodiment, the motor maintains the first preset speed, and during this process, it is possible to observe whether the washing machine experiences a second abnormal situation.

[0011] In some embodiments, the controller of the washing machine is further configured to control the washing machine to start a defoaming program if a second abnormal condition occurs, including: controlling the motor to stop rotating and controlling the washing machine to start a second water inlet program if the second abnormal condition occurs. The duration of the second water inlet program is a fifth preset duration. After the second water inlet program ends, the washing machine is controlled to start a second static program. The second static program indicates that the motor remains stopped, and the washing machine does not perform water inlet or outlet. The duration of the second static program is a sixth preset duration; after the second static program ends, the washing machine is controlled to start a draining program. In this embodiment, when the washing machine experiences a second abnormal condition, the defoaming program deeply defoams, further ensuring the amount of foam inside the washing machine.

[0012] In some embodiments, the washing machine controller is further configured to increase the motor speed to a second preset speed for spin-drying after the drainage cycle is completed. In this embodiment, the motor speed is increased to the second preset speed for spin-drying only after the washing machine has drained to the empty tub level. Draining the washing machine to the empty tub level ensures that the washing machine will not spin-dry with water remaining.

[0013] In some embodiments, the controller of the washing machine is further configured to repeatedly control the washing machine to start the first water inlet program, start the drain program, and start the first static program a first preset number of times if the washing machine does not experience a second abnormal condition. The motor speed is controlled to increase to a second preset speed for spin-drying. In this embodiment, when the washing machine does not experience a second abnormal condition, the washing machine repeatedly starts the first water inlet program, the drain program, and the first static program. This can solve problems such as excessive foam inside the washing machine; it can also solve the problem of excessive air pockets at the drain pump clogging the drain pipe and causing the drain pump to become blocked due to excessive foam inside the washing machine; the washing machine drains to the empty tub level each time it drains, preventing the washing machine from spin-drying with water inside.

[0014] In some embodiments, the controller of the washing machine is further configured to, during the process of the motor speed increasing to a second preset speed, if the washing machine experiences a first abnormal situation, control the motor speed to decrease to the first preset speed and shut off the drain pump. In this embodiment, if the washing machine experiences a first abnormal situation during the process of the motor speed increasing to the second preset speed, the washing machine again controls the motor speed to decrease to the first preset speed and shuts off the drain pump, ensuring that if there is too much foam in the washing machine and the abnormality still occurs after one defoaming process, the washing machine can prepare to defoam again.

[0015] Secondly, this application provides a control method for a washing machine, which is applied to the washing machine of the first aspect. The method includes: when a first abnormal condition occurs in the washing machine, controlling the motor speed of the washing machine to decrease to a first preset speed, and shutting off the drain pump of the washing machine; the first abnormal condition is that the power of the washing machine reaches its rated power, the deviation between the motor speed and a second preset speed is greater than a preset difference, and the increase in motor speed within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed; while the motor speed is maintained at the first preset speed, if a second abnormal condition occurs in the washing machine, controlling the washing machine to start a defoaming program; the defoaming program is used to eliminate foam in the washing machine; the second abnormal condition indicates that the power of the washing machine is higher than the power before the motor speed decreased to the first preset speed, the water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or the motor speed of the washing machine is unstable, or one or more of these conditions are present.

[0016] In some embodiments, the method further includes: after the defoaming process is completed, controlling the motor speed of the washing machine to increase to a second preset speed for spin drying.

[0017] In some embodiments, the method further includes: if a first abnormal situation occurs in the washing machine during the process of the washing machine motor speed increasing to a second preset speed, controlling the washing machine motor speed to decrease to a first preset speed and turning off the washing machine drain pump.

[0018] Thirdly, this application provides a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes the washing machine control method provided in the second aspect and possible implementations.

[0019] Fourthly, this application provides a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform the washing machine control method provided in the second aspect and possible implementations.

[0020] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement the washing machine control method provided in the second aspect and possible implementations.

[0021] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor or may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0022] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a washing machine provided in an embodiment of this application;

[0024] Figure 2 A hardware configuration diagram of a washing machine provided in an embodiment of this application;

[0025] Figure 3 A flowchart illustrating a control method for a washing machine provided in an embodiment of this application;

[0026] Figure 4A schematic diagram illustrating the prediction of motor speed change in a washing machine, as provided in an embodiment of this application;

[0027] Figure 5 A flowchart illustrating another control method for a washing machine provided in an embodiment of this application;

[0028] Figure 6 A flowchart illustrating another control method for a washing machine provided in an embodiment of this application;

[0029] Figure 7 A schematic diagram illustrating the prediction of motor speed change in a washing machine, as provided in an embodiment of this application;

[0030] Figure 8 A flowchart illustrating another control method for a washing machine provided in an embodiment of this application;

[0031] Figure 9 A flowchart illustrating another control method for a washing machine provided in an embodiment of this application;

[0032] Figure 10 A schematic diagram illustrating the prediction of motor speed change in a washing machine, as provided in an embodiment of this application;

[0033] Figure 11 A flowchart illustrating another control method for a washing machine provided in an embodiment of this application;

[0034] Figure 12 This is a schematic diagram of the hardware structure of a controller provided in an embodiment of this application. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0038] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0039] Existing washing machines often experience problems during the spin-drying process. These problems include excessive foam inside the machine, air blockage in the drain pump, or spin-drying with water remaining. This can cause the motor to operate at its rated speed, even though the motor's power output is at its rated capacity. Consequently, this results in high moisture content in the clothes after spin-drying, poor rinsing performance, or excessive energy consumption.

[0040] Based on the above, this application provides a washing machine and its control method. The washing machine can, when its power reaches its rated power, the deviation between its motor speed and a second preset speed is greater than a preset difference, and the increase in motor speed within a first preset time period is less than the preset difference, reduce its motor speed to a first preset speed, shut off the drain pump, and perform initial defoaming through water inlet, drainage, and stillness. The second preset speed is greater than the first preset speed. After initial defoaming, if the washing machine still exhibits one or more of the following: its power is higher than the power before the motor speed decreased to the first preset speed, its water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or its motor speed is unstable, the defoaming program is activated again for further defoaming. This ensures that excessive foam does not affect the washing machine's spin-drying performance, thus preventing problems such as high moisture content in clothes after spin-drying, poor rinsing effect, or excessive power consumption.

[0041] like Figure 1 As shown, the washing machine 11 may include: a cabinet 101, a washing tub 102, and a display 103. The washing tub 102 is disposed in the cabinet 101.

[0042] In some embodiments, the washing tub 102 can be used to hold clothes. For example, when the washing machine 11 is a front-loading washing machine, the washing tub 102 of the washing machine 11 may include a tub assembly, namely an inner tub and an outer tub.

[0043] In some embodiments, the display 103 may be a liquid crystal display or an organic light-emitting diode (OLED) display. The specific type, size, and resolution of the display 103 are not limited, but those skilled in the art will understand that the display 103 can be modified in terms of performance and parameters as needed.

[0044] In some embodiments, the display 103 may be used to display the control panel of the washing machine or other image information. For example, the washing machine may display its current operating information on the display 103, such as the type of washing program, the duration of the washing program and the remaining duration of the program, and the amount of water used for washing.

[0045] Figure 2 An exemplary hardware configuration block diagram of the washing machine 11 in an embodiment of this application is shown.

[0046] like Figure 2 As shown, the washing machine 11 may further include: a controller 104, a power supply 105, a water inlet valve 106, a drain pump 107, and a motor 108. The power supply 105, the water inlet valve 106, the drain pump 107, and the motor 108 are all connected to the controller 104.

[0047] In some embodiments, controller 104 refers to a device that can generate operation control signals according to instruction opcodes and timing signals to instruct washing machine 11 to execute control instructions. Exemplarily, controller 104 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Controller 104 can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0048] For example, when the washing machine 11 experiences the following conditions: the washing machine's power reaches its rated power, the deviation between the washing machine's motor speed and the second preset speed is greater than a preset difference, and the increase in the washing machine's motor speed within a first preset time period is less than the preset difference, the controller 104 controls the washing machine's motor speed to decrease to the first preset speed and shuts off the washing machine's drain pump. The second preset speed is greater than the first preset speed.

[0049] In some embodiments, the water inlet valve 106, under the control of the controller 104, can introduce water into the washing tub 102 of the washing machine 11 to rinse the clothes inside the washing tub 102.

[0050] In some embodiments, under the control of the controller 104, the drain pump 107 can drain the water in the washing tub 102 of the washing machine 11 and drain the water in the washing tub 102 to the empty tub water level.

[0051] In some embodiments, the motor 108, under the control of the controller 104, adjusts its rotation speed to drive the washing tub 102 of the washing machine 11.

[0052] In some embodiments, under the control of the controller 104, the power supply 105 can provide power supply support for the washing machine 11 by using the power input from the external power source.

[0053] In some embodiments, the controller 104 may be configured to, when a first abnormal condition occurs in the washing machine, control the motor speed of the washing machine to decrease to a first preset speed and shut down the drain pump of the washing machine; the first abnormal condition indicates that the power of the washing machine reaches the rated power of the washing machine, the deviation between the motor speed of the washing machine and the second preset speed is greater than a preset difference, and the increase in the motor speed of the washing machine within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed; while the motor speed of the washing machine is maintained at the first preset speed, if a second abnormal condition occurs in the washing machine, control the washing machine to start the defoaming program; the defoaming program is used to eliminate foam in the washing machine; the second abnormal condition indicates that the power of the washing machine is higher than the power of the washing machine before the motor speed decreases to the first preset speed, the water level frequency of the washing machine is lower than the water level frequency of the washing machine before the motor speed decreases to the first preset speed, or the motor speed of the washing machine is unstable, or one or more of these conditions are present.

[0054] In some embodiments, the controller 104 may also be configured to control the washing machine to start a first water inlet program after the drain pump is turned off for a second preset time; the duration of the first water inlet program is a third preset time; and after the first water inlet program ends, control the washing machine to start a drain program, which is used to drain the washing machine to the empty tub level.

[0055] In some embodiments, the controller 104 may also be configured to control the drain pump to shut off and control the washing machine to start a first static program after the drainage program is completed; the first static program means that the motor speed of the washing machine is maintained at a first preset speed and the washing machine does not perform water intake or drainage; the duration of the first static program is a fourth preset duration.

[0056] In some embodiments, the controller 104 is further configured to, if a second abnormal condition occurs in the washing machine, control the washing machine to start a defoaming program, including: if the washing machine experiences a second abnormal condition, controlling the washing machine motor to stop rotating and controlling the washing machine to start a second water inlet program; the duration of the second water inlet program is a fifth preset duration; after the second water inlet program ends, controlling the washing machine to start a second static program; the second static program indicates that the washing machine motor remains stopped rotating, and the washing machine does not perform water inlet or outlet; the duration of the second static program is a sixth preset duration; after the second static program ends, controlling the washing machine to start a draining program, the draining program being used to drain the washing machine to the empty drum water level.

[0057] In some embodiments, the controller 104 is further configured to control the motor speed of the washing machine to increase to a second preset speed for spin-drying after the drainage process is completed.

[0058] In some embodiments, the controller 104 is further configured to, if the washing machine does not experience a second abnormal condition, repeatedly control the washing machine to start the first water inlet program, control the washing machine to start the drainage program, and control the washing machine to start the first static program a first preset number of times; and control the motor speed of the washing machine to increase to a second preset speed for spin drying.

[0059] In some embodiments, the controller 104 is further configured to, during the process of the washing machine motor speed increasing to the second preset speed, if the washing machine experiences a first abnormal situation, control the washing machine motor speed to decrease to the first preset speed and shut down the washing machine drain pump.

[0060] Based on the above washing machine, such as Figure 3 As shown in the figure, this application provides a control method for a washing machine, which includes the following steps:

[0061] S101. When the first abnormal situation occurs, the washing machine will reduce the motor speed to the first preset speed and turn off the drain pump.

[0062] In some embodiments, the first abnormal situation may be that the power of the washing machine reaches the rated power of the washing machine, the deviation between the motor speed of the washing machine and the second preset speed is greater than the preset difference, and the increase in the motor speed of the washing machine within the first preset time period is less than the preset difference.

[0063] The second preset speed is greater than the first preset speed.

[0064] For example, when the rated power of the washing machine is 400W, the first preset speed is 1000r / min, the second preset speed is 1400r / min, and the preset difference is 20r / min, if the power of the washing machine reaches 400W, the deviation of the washing machine's motor speed from 1400r / min is greater than 20r / min, and the increase in the washing machine's motor speed within 5 seconds is less than 20r / min, the washing machine will reduce the motor speed to 1000r / min and close the drain valve.

[0065] In some embodiments, when a first abnormal condition occurs in the washing machine, the change in the motor speed of the washing machine can be as follows: Figure 4 As shown in the diagram, the solid line represents the washing machine's motor speed when there are no abnormalities; the dashed line represents the washing machine's motor speed during actual operation. It is evident that the washing machine's motor speed during actual operation is lower than the speed when there are no abnormalities, therefore, it can be determined that the washing machine is experiencing its first abnormality.

[0066] S102. If a second abnormal situation occurs while the washing machine motor speed is maintained at the first preset speed, the washing machine will start the defoaming program.

[0067] The defoaming program is used to eliminate foam in the washing machine.

[0068] In some embodiments, the second abnormal situation may be one or more of the following: the power of the washing machine is higher than the power before the motor speed of the washing machine drops to the first preset speed; the water level frequency is lower than the water level frequency before the motor speed of the washing machine drops to the first preset speed; or the motor speed of the washing machine is unstable.

[0069] For example, if the washing machine's power is higher than the speed at which the washing machine's motor speed drops to 1000 rpm, it indicates that the washing machine is malfunctioning, and the washing machine will activate the defoaming program.

[0070] For example, if the water level frequency of the washing machine is lower than the speed before the washing machine motor speed drops to 1000 r / min, it indicates that the washing machine is malfunctioning, and the washing machine will start the defoaming program.

[0071] As can be seen from the above, in the method described in this application embodiment, when the washing machine's power reaches its rated power, the deviation between the washing machine's motor speed and the second preset speed is greater than a preset difference, and the increase in the washing machine's motor speed within a first preset time period is less than the preset difference, the washing machine's motor speed decreases to the first preset speed. When the washing machine's power reaches its rated power, but the actual motor speed does not reach the rated speed, the washing machine's motor speed is reduced in time to reduce the washing machine's motor power consumption and prevent the washing machine's power consumption from exceeding the standard. During the process of maintaining the washing machine's motor speed at the first preset speed, if the washing machine's power is higher than the power before the motor speed decreased to the first preset speed, the washing machine's water level frequency is lower than the water level frequency before the motor speed decreased to the first preset speed, or the washing machine's motor speed is unstable, or one or more of these conditions are met, the washing machine activates the defoaming program. The defoaming program can solve the problem of excessive foam inside the washing machine.

[0072] In the method provided in this application embodiment, foam inside the washing machine can be initially eliminated by water inlet, water outlet, and a period of stillness. Therefore, as Figure 5 As shown, when the washing machine experiences a first abnormal situation, after executing the above step S101, the method further includes the following steps S201-S203.

[0073] S201. After the second preset time for shutting off the drain pump, the washing machine starts the first water intake program.

[0074] The duration of the first water intake process is the third preset duration.

[0075] In other embodiments, after the washing machine shuts off the drain pump for a second preset time, the washing machine starts the first water inlet program. This can be achieved by opening the washing machine's water inlet valve, allowing water to directly rinse the clothes inside the washing machine. The water inlet valve is open for a second preset time.

[0076] For example, 10 seconds after the washing machine closes the drain valve, it opens the inlet valve, allowing water to directly wash the clothes. 5 seconds after opening the inlet valve, the washing machine closes the inlet valve.

[0077] S202. The washing machine starts the drainage program and drains water to the empty drum level.

[0078] For example, after the first water intake cycle of the washing machine is completed, the washing machine turns on the drain pump to drain the water from the washing machine to the empty drum level.

[0079] S203. The washing machine turns off the drain pump and starts the first static program.

[0080] The first static program means that the washing machine motor maintains a first preset speed, and the washing machine does not fill or drain water. The duration of the first static program is a fourth preset duration.

[0081] In some embodiments, after the washing machine drains to the empty drum level, i.e., after the washing machine draining cycle is completed, the washing machine shuts off the drain pump. Furthermore, the washing machine motor maintains a first preset speed, and the washing machine does not perform any water intake or drainage. The duration for which the washing machine motor maintains the first preset speed is a fourth preset duration.

[0082] For example, after the washing machine drains to the empty tub level, the drain pump is turned off. The washing machine motor continues to run at 1000 rpm for 5 seconds, and the washing machine does not fill or drain water.

[0083] As can be seen from the above, in the method described in this application embodiment, the washing machine initially eliminates foam by reducing the motor speed to a first preset speed, then opening the drain valve to allow water to enter and rinse the clothes, and finally opening the drain pump to drain the water to the empty drum level. Rinsing the clothes with water solves the problem of excessive foam in the washing machine; draining the water to the empty drum level solves the problem of the washing machine spinning with water inside.

[0084] In the methods provided in the embodiments of this application, such as Figure 6 As shown, if no second abnormal situation occurs during the first static program of the washing machine, the method further includes the following steps S301-S302.

[0085] S301, The washing machine repeatedly starts the first water inlet program, starts the drainage program, and starts the first static program a first preset number of times.

[0086] In some embodiments, if no second abnormal situation occurs during the first static program of the washing machine, the washing machine repeats the following steps a first preset number of times: the washing machine starts the first water inlet program, after the first water inlet program ends, the washing machine starts the drain program, and after the drain program ends, the washing machine starts the first static program.

[0087] The first preset number of times can be determined based on the type of clothes in the washing machine. If it is a large item such as a bed sheet or duvet cover, the first preset number of times can be more than 3 times; if it is a small item such as a short-sleeved shirt or shorts, the first preset number of times can be less than or equal to 3 times.

[0088] For example, during the first static program of the washing machine, if the washing machine does not experience a second abnormal situation, the washing machine repeats the following steps twice: First, the washing machine opens the water inlet valve to let in water for 5 seconds, and then closes the water inlet valve after the water inlet is finished; second, the washing machine turns on the drain pump to drain the washing machine to the empty tub level, and then turns off the drain pump after the washing machine drains to the empty tub level; finally, the washing machine motor maintains the first preset speed for 5 seconds, and the washing machine neither takes in water nor drains water.

[0089] S302, The washing machine motor speed increases to the second preset speed for spin drying.

[0090] In some embodiments, such as Figure 7 As shown, the solid line represents the washing machine motor speed when there are no abnormalities; the dashed line represents the washing machine motor speed during actual operation. When the first abnormality occurs, the washing machine motor speed drops to the first preset number of times. After the washing machine repeats the first water inlet program, the drain program, and the first static program a first preset number of times, the washing machine motor speed increases to the second preset number of times to perform spin drying.

[0091] As can be seen from the above, in the method described in this application embodiment, when the washing machine does not experience one or more of the following: the washing machine's power is higher than the power before the motor speed drops to the first preset speed; the water level frequency is lower than the water level frequency before the motor speed drops to the first preset speed; or the washing machine's motor speed is unstable, the washing machine repeatedly starts the first preset number of water inlet programs, the first drain programs, and the first stationary programs. This solves problems such as excessive foam inside the washing machine; it also solves the problem of excessive air pockets at the drain pump causing blockage of the drain pipe and resulting in air stagnation in the drain pump due to excessive foam inside the washing machine; and the washing machine drains to the empty tub level each time it drains, thus preventing the washing machine from spinning with water inside.

[0092] In the methods provided in the embodiments of this application, such as Figure 8 As shown, if a second abnormal situation occurs during the first static program of the washing machine, the method further includes the following steps S401-S404.

[0093] S401. The washing machine motor stops rotating and starts the second water intake program.

[0094] The second water intake program has a water intake duration of the fifth preset duration, which is used to rinse the clothes in the washing machine.

[0095] In some embodiments, if a second abnormal situation occurs in the washing machine, the washing machine motor stops rotating. After the washing machine motor stops rotating, the washing machine opens the water inlet valve to rinse the clothes in the washing machine, and after a fifth preset time, the washing machine closes the drain valve.

[0096] For example, if the washing machine experiences a second abnormal situation, the washing machine motor stops accelerating, and the motor's rotational inertia drops to 0. After the washing machine motor stops rotating, the washing machine opens the water inlet valve to rinse the clothes inside. After 10 seconds, the washing machine closes the water inlet valve.

[0097] S402, The washing machine starts the second static cycle.

[0098] The second water intake program means that the washing machine motor remains stopped and the washing machine does not perform any water intake or drainage operations; the duration of the second water intake program is the sixth preset duration.

[0099] In some embodiments, after the washing machine finishes the second water intake cycle, the washing machine motor remains stopped for a sixth preset time period, and the washing machine does not perform water intake or drainage operations.

[0100] For example, after the washing machine finishes its second water intake, the washing machine keeps its motor stopped for 10 minutes and does not perform any water intake or drainage operations.

[0101] S403, The washing machine starts the drainage program.

[0102] S404, The washing machine motor speed increases to the second preset speed for spin drying.

[0103] In some embodiments, after the washing machine's drainage process is completed, the washing machine's motor speed increases to a second preset speed for spin drying.

[0104] For example, after the washing machine finishes its draining cycle, the washing machine's motor speed increases to 1400 rpm for spin drying.

[0105] As can be seen from the above, in the method described in this application embodiment, when the washing machine experiences one or more of the following: the washing machine's power is higher than the power before the motor speed drops to the first preset speed; the water level frequency is lower than the water level frequency before the motor speed drops to the first preset speed; or the washing machine's motor speed is unstable, the washing machine activates a deep defoaming program. The prolonged stillness after water intake during the defoaming program further ensures that the foam inside the washing machine is eliminated by the incoming water. Simultaneously, draining the water to the empty drum level during drainage ensures that the washing machine does not spin-dry with water inside.

[0106] In the method provided in the embodiments of this application, see Figure 9 As shown, if the washing machine experiences the first abnormal situation again during the process of the washing machine motor speed increasing to the second preset speed, the method further includes the following steps S501-S502.

[0107] S501, the washing machine motor speed drops to the first preset speed, and the washing machine shuts off the drain pump.

[0108] In some embodiments, if the washing machine experiences a first abnormal situation again while the motor speed of the washing machine is increasing to a second preset speed, the motor speed of the washing machine will decrease to the first preset speed, and the washing machine will shut off the drain pump.

[0109] For example, if the first abnormal situation occurs again during the process of the washing machine motor speed increasing to the second preset speed, the washing machine motor speed will drop to 1000 r / min and the washing machine will shut off the drain pump.

[0110] S502, The washing machine executes the methods in steps S201-S203 again.

[0111] In some embodiments, such as Figure 10 As shown, the solid line represents the washing machine motor speed when there are no abnormalities; the dashed line represents the washing machine motor speed during actual operation. When the first abnormality occurs, the washing machine speed drops to 1000 r / min. After a series of defoaming programs, the washing machine motor accelerates to 1400 r / min for spin drying. If the first abnormality occurs again during acceleration, the washing machine motor speed drops to 1000 r / min again, and defoaming is performed again. After defoaming, the washing machine speed increases to 1400 r / min for spin drying.

[0112] As can be seen from the above, in the method described in this application embodiment, during the spin-drying process when the washing machine motor speed accelerates to the second preset speed, the washing machine again experiences the first abnormal situation, the washing machine motor speed drops back to the first preset speed, the drain pump is shut off, and the washing machine control method in steps S201-S203 is executed again. This further solves the problem of excessive foam in the washing machine. When there is excessive foam in the washing machine, the foam in the washing machine is reduced by repeatedly defoaming.

[0113] In the method provided in the embodiments of this application, if no second abnormal condition occurs, such as Figure 11As shown, the method for eliminating foam inside a washing machine can be roughly divided into four steps. Step 1: Determine if the motor has reached its rated power, whether the deviation between the motor speed and the second preset speed is greater than a preset difference, and whether the increase in motor speed within a first preset time period is less than the preset difference; that is, determine if the washing machine has encountered a first abnormal situation. If the washing machine does not encounter a first abnormal situation, it will spin-dry normally; if a first abnormal situation occurs, the washing machine will proceed to Step 2. Step 2: The washing machine motor speed drops to the first preset speed, and the drain pump is turned off within the first preset time period. Step 3: The washing machine executes the above steps S201-S203 and repeats the process a first preset number of times. Step 4: The washing machine motor speed increases to the second preset speed, and during the process of the washing machine motor increasing to the second preset speed, it monitors whether the washing machine has encountered a first abnormal situation.

[0114] As described above, in the method of this application's real-time example, by reducing the speed and turning off the drain pump when the washing machine experiences the first abnormal situation, and then repeatedly performing water intake, drainage, and stillness, the foam inside the washing machine is eliminated. During drainage, the washing machine drains to the empty tub level, preventing the washing machine from spinning with water remaining. Simultaneously, as the washing machine's motor speed increases to the second preset speed, it monitors whether the first abnormal situation occurs, preventing incomplete foam elimination. The repeated elimination of foam inside the washing machine, coupled with draining to the empty tub level each time, effectively prevents the drain pump from developing air pockets due to foam and water, which could cause the drain pump to become clogged and unable to drain properly.

[0115] As can be seen, the above mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the embodiments of this application provide corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the modules and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0116] This application embodiment can divide the controller into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. Optionally, the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0117] This application also provides a hardware structure diagram of a controller, such as... Figure 12 As shown, the controller 104 includes a processor 109, and optionally, a memory 110 and a communication interface 111 connected to the processor 109. The processor 109, memory 110, and communication interface 111 are connected via a bus 112.

[0118] Processor 109 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 109 may also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 109 may also include multiple CPUs, and processor 109 may be a single-core processor or a multi-core processor. Here, "processor" can refer to one or more devices, circuits, or processing cores used to process data (e.g., computer program instructions).

[0119] The memory 110 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 110 may exist independently or may be integrated with the processor 109. The memory 110 may contain computer program code. The processor 109 is used to execute the computer program code stored in the memory 110, thereby implementing the control method provided in this application embodiment.

[0120] The communication interface 111 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 111 can be a module, circuit, transceiver, or any device capable of communication.

[0121] Bus 112 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Bus 112 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 12 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0122] This application also provides a computer-readable storage medium including computer-executable instructions that, when run on a computer, cause the computer to perform any of the control methods provided in the above embodiments.

[0123] This application also provides a computer program product containing computer execution instructions, which, when run on a computer, causes the computer to execute any of the control methods provided in the above embodiments.

[0124] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer-executable instructions. When these computer-executable instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer-executable instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer-executable instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs).

[0125] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0126] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A washing machine, characterized in that, The washing machine includes a housing, and a washing machine motor, a drain pump, and a controller respectively disposed in the housing, wherein: The motor is used to drive the washing machine to perform spin-drying; The drain pump is used to drain the water from the washing machine; The controller is connected to both the motor and the drainage pump, and is configured to: When the washing machine experiences a first abnormal situation, the motor speed is controlled to decrease to a first preset speed, and the drain pump is turned off; the first abnormal situation indicates that the washing machine's power reaches the washing machine's rated power, the deviation between the motor speed and the second preset speed is greater than a preset difference, and the increase in the motor speed within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed; If a second abnormal situation occurs in the washing machine while the motor speed is maintained at the first preset speed, the washing machine is controlled to start the defoaming program; the defoaming program is used to eliminate foam in the washing machine; the second abnormal situation indicates that the power of the washing machine is higher than the power before the motor speed drops to the first preset speed, the water level frequency of the washing machine is lower than the water level frequency before the motor speed drops to the first preset speed, or the motor speed is unstable, or one or more of these conditions. The controller is also configured to: After the drain pump is turned off for a second preset time, the washing machine is controlled to start the first water intake program; the duration of the first water intake program is a third preset time. After the first water intake process is completed, the washing machine is controlled to start the drainage process, which is used to drain the water from the washing machine to the empty drum level.

2. The washing machine according to claim 1, characterized in that, The controller is also configured to: After the drainage process is completed, the drain pump is turned off and the washing machine is put into a first static program. The first static program means that the motor speed is maintained at a first preset speed and the washing machine does not fill or drain water. The duration of the first static program is a fourth preset duration.

3. The washing machine according to claim 1, characterized in that, The controller is configured to activate the defoaming program of the washing machine if a second abnormal condition occurs, including: If the washing machine experiences a second abnormal situation, the motor is controlled to stop rotating, and the washing machine is controlled to start a second water intake program; the duration of the second water intake program is a fifth preset duration. After the second water intake program ends, the washing machine is controlled to start the second static program; the second static program means that the motor remains stationary and the washing machine does not perform water intake or drainage; the duration of the second static program is a sixth preset duration; After the second static program ends, the washing machine is controlled to start the drainage program, which is used to drain the washing machine to the empty drum level.

4. The washing machine according to claim 3, characterized in that, The controller is also configured to: After the drainage process is completed, the motor speed is controlled to increase to the second preset speed for dehydration.

5. The washing machine according to claim 1, characterized in that, The controller is also configured to: If the washing machine does not experience the second abnormal situation, the washing machine is repeatedly controlled to start the first water inlet program, start the drain program, and start the first static program a first preset number of times. The motor speed is controlled to increase to a second preset speed for dehydration.

6. The washing machine according to claim 1, characterized in that, The controller is also configured to: If the washing machine experiences the first abnormal situation during the process of the motor speed increasing to the second preset speed, the motor speed is controlled to decrease to the first preset speed, and the drain pump is turned off.

7. A method for controlling a washing machine, characterized in that, The method includes: When the washing machine experiences a first abnormal situation, the motor speed of the washing machine is controlled to decrease to a first preset speed, and the drain pump of the washing machine is turned off; the first abnormal situation is that the power of the washing machine reaches the rated power, the deviation between the motor speed and the second preset speed is greater than a preset difference, and the increase in the motor speed within a first preset time period is less than the preset difference; the second preset speed is greater than the first preset speed; If a second abnormal situation occurs in the washing machine while the motor speed is maintained at the first preset speed, the washing machine is controlled to start the defoaming program; the defoaming program is used to eliminate foam in the washing machine; the second abnormal situation indicates that the power of the washing machine is higher than the power before the motor speed of the washing machine drops to the first preset speed, the water level frequency is lower than the water level frequency before the motor speed of the washing machine drops to the first preset speed, or the motor speed of the washing machine is unstable, or one or more of these conditions are present. After the drain pump is turned off for a second preset time, the washing machine is controlled to start the first water intake program; the duration of the first water intake program is a third preset time. After the first water intake process is completed, the washing machine is controlled to start the drainage process, which is used to drain the water from the washing machine to the empty drum level.

8. The method according to claim 7, characterized in that, The method further includes: After the defoaming process is completed, the motor speed of the washing machine is controlled to increase to the second preset speed for dehydration.

9. The method according to claim 8, characterized in that, The method further includes: If the washing machine experiences the first abnormal situation during the process of the washing machine's motor speed increasing to the second preset speed, the motor speed of the washing machine will be controlled to decrease to the first preset speed, and the drain pump of the washing machine will be turned off.

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