Washing machine

Abstract

This application discloses a washing machine, including an outer drum, an inner drum, a controller, and a water level detection device. The controller is configured to: when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, control the inner drum to rotate for a preset rotation time so that the clothes in the inner drum absorb liquid; obtain the target frequency value of the liquid in the outer drum detected by the water level detection device; obtain the difference between the target frequency value and the reference frequency value corresponding to the start-up washing stage, and correct the reference frequency value corresponding to each washing stage of the washing machine based on the difference. In the start-up washing stage, when the frequency value of the liquid level in the outer drum reaches the preset initial frequency value, the washing machine of this application corrects the reference frequency value of each washing stage based on the difference between the target frequency value measured after the clothes absorb liquid and the reference frequency value of that stage, thereby achieving precise control of water consumption in the washing task.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and includes, but is not limited to, a washing machine. Background Technology

[0002] With technological advancements, washing machines have become increasingly common, enhancing the convenience and comfort of people's daily lives. When consumers choose a washing machine, the accuracy of water consumption control has become one of the key indicators for evaluating its performance.

[0003] In related technologies, to achieve precise water control, water level sensors are typically used to monitor the water level in real time during the washing process and adjust the washing machine's water intake operation based on a preset reference water level. However, water level sensors may be affected by inherent errors or external factors during use, leading to a decrease in the accuracy of water control. Furthermore, even within the same brand of washing machines, the design details and technical specifications of their water level sensors may differ, impacting the stability and accuracy of water control. Summary of the Invention

[0004] This application discloses a washing machine. In the washing machine of this application, when the frequency value of the liquid surface in the outer drum reaches the preset initial frequency value during the start-up washing stage, the reference frequency value of each washing stage is corrected based on the difference between the target frequency value measured after the clothes absorb liquid and the reference frequency value of that stage, so as to achieve precise control of water consumption in the washing task.

[0005] This application embodiment discloses a washing machine, the washing machine comprising:

[0006] The outer tub is used to hold the liquid required during the operation of the washing machine;

[0007] An inner drum, disposed inside the outer drum, is used to rotate during the operation of the washing machine to clean the clothes in the inner drum with the liquid;

[0008] A controller, connected to the inner cylinder, is used to control the rotation of the inner cylinder;

[0009] A water level detection device, comprising an air chamber, an air pipe, and a water level sensor, wherein the water level sensor is connected to the air chamber via the air pipe, and the air chamber is also connected to an outer cylinder, for detecting changes in the liquid level in the outer cylinder;

[0010] The controller is configured to:

[0011] When the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, the inner drum is controlled to rotate for a preset rotation time so that the clothes in the inner drum absorb the liquid.

[0012] Obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device;

[0013] The difference between the target frequency value and the reference frequency value corresponding to the start washing stage is obtained, and the reference frequency value corresponding to each washing stage of the washing machine is corrected according to the difference.

[0014] In the above technical solution, the washing machine detects the frequency value corresponding to the liquid level in the outer drum through a water level detection device. During the start-up washing stage, when the frequency value of the liquid in the outer drum reaches the preset initial frequency value, the inner drum is controlled to rotate so that the clothes in the inner drum absorb the liquid. The target frequency value of the liquid on the liquid level after the clothes absorb the liquid is obtained. By comparing the difference between the target frequency value and the reference frequency value corresponding to the start-up washing stage, the reference frequency value corresponding to each washing stage, including the start-up washing stage, is corrected based on the difference. This makes the actual liquid level position of each washing stage under the corrected reference frequency value closer to the ideal liquid level position that can provide better washing effect, thereby achieving precise control of the water intake.

[0015] In some possible embodiments, the reference frequency value corresponding to the start washing stage is the theoretical frequency value corresponding to the liquid in the outer drum reaching the bottom of the inner drum, and the preset initial frequency value is determined based on the reference frequency value and the preset fault tolerance frequency corresponding to the water level detection device.

[0016] In the above technical solutions, for diverse washing machine platforms or different water level detection devices, using the frequency value measured by the water level detection device to infer the liquid level position often deviates from the actual liquid level position. To ensure that the clothes can absorb liquid at the preset initial frequency value, the reference frequency value corresponding to the start of the washing stage is the theoretical frequency value at which the liquid in the outer drum reaches the bottom of the inner drum. The preset initial frequency value is determined by using this reference frequency value and the preset error tolerance frequency corresponding to the water level detection device. This ensures that even if the washing machine's water level detection device has an error of the size of the preset error tolerance frequency, the liquid level in the outer drum will still be a certain distance higher than the bottom of the inner drum when the frequency value detected by the water level detection device is the preset initial frequency value.

[0017] In some possible embodiments, the washing machine further includes a weighing sensor for detecting the load on the inner drum, and the controller controls the inner drum to rotate for a preset rotation time, configured as follows:

[0018] Obtain the weight value detected by the weighing sensor;

[0019] If the weight value is greater than a preset weight threshold, the inner cylinder is controlled to rotate for the preset rotation time.

[0020] In the above technical solution, by obtaining the weight value detected by the weighing sensor when the washing machine is in the start-up washing stage, the load condition of the inner drum in the start-up washing stage can be determined. If the weight value is greater than the preset weight threshold, the clothes in the inner drum can absorb liquid exceeding the bottom of the inner drum, thereby improving the accuracy of correcting the reference frequency value corresponding to each washing stage.

[0021] In some possible embodiments, the controller controls the inner cylinder to rotate for a preset rotation time, and is configured as follows:

[0022] The inner cylinder is controlled to rotate for a preset rotation duration based on a preset start-stop ratio and a preset rotation speed. The preset start-stop ratio is the ratio between the start rotation duration and the stop rotation duration.

[0023] In the above technical solution, the rotation of the inner drum is controlled by a preset start-stop ratio and a preset rotation speed, ensuring that the clothes in the inner drum can fully absorb the liquid. Thus, when the liquid level in the outer drum drops to a designated position, the difference between the target frequency value and the reference frequency value set at the start of the washing stage accurately reflects the difference between the expected frequency value and the actual target frequency measured by the water level monitoring sensor under ideal conditions without error and external interference. Based on this difference, the reference frequency values ​​for each washing stage can be adjusted and optimized accordingly, improving the water volume control accuracy in the washing process.

[0024] In some possible embodiments, the washing machine further includes a memory for storing a first mapping relationship between preset washing stages and preset reference frequency values, wherein the controller is configured to correct the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference, and is configured to:

[0025] The washing stage currently being performed by the washing machine is detected, and a target reference frequency value corresponding to the current washing stage is obtained based on the first mapping relationship.

[0026] The target reference frequency value is corrected based on the sum of the target reference frequency value and the difference.

[0027] In the above technical solution, different washing stages in a single washing cycle of the washing machine can correspond to different reference frequency values, meaning that the reference water consumption differs for each washing stage. By obtaining the difference between the target frequency value and the reference frequency value corresponding to the start washing stage, the reference frequency values ​​for other washing stages can be adjusted, improving the efficiency of correcting the reference frequency values ​​for each washing stage and simultaneously enhancing the accuracy of water volume control in the washing cycle.

[0028] In some possible embodiments, the controller is configured to correct the target reference frequency value based on the sum of the target reference frequency value and the difference, as follows:

[0029] The sum of the target reference frequency value and the difference is determined as the corrected target reference frequency value.

[0030] In the above technical solution, by directly determining the sum of the target reference frequency value and the difference as the corrected target reference frequency value for the current washing stage, the computational complexity is reduced. This ensures that the corrected target reference frequency value takes into account both the water demand of the current washing stage and the frequency deviation detected during the actual start of the washing stage. This improves the water volume control accuracy of the current washing stage and avoids the washing effect being affected by insufficient water volume or the waste of water resources caused by excessive water volume.

[0031] In some possible embodiments, the memory is further configured to store a second mapping relationship between a preset operating mode and a preset correction value, wherein the controller corrects the target reference frequency value based on the sum of the target reference frequency value and the difference, and is configured to:

[0032] The current operating mode of the washing machine is detected, and a target correction value is determined based on the current operating mode and the second mapping relationship.

[0033] The sum of the target reference frequency value, the difference, and the target correction value is determined as the corrected target reference frequency value.

[0034] In the above technical solution, the washing machine can select the corresponding target correction value to correct the target reference frequency according to the current operating mode, so that the corrected target reference frequency is more in line with the washing needs of different operating modes and improves the washing effect of clothes.

[0035] In some possible embodiments, the controller is further configured to:

[0036] Based on the corrected reference frequency values ​​corresponding to each washing stage of the washing machine, the stage frequency value of the liquid in the outer drum during each washing stage is detected by the water level detection device.

[0037] If the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value in each washing stage is less than or equal to a preset frequency threshold, the current washing task is completed. The current washing task includes each washing stage.

[0038] In the above technical solution, by comparing the actual measured frequency values ​​of each washing stage with the corrected reference frequency values, if the difference between these two frequency values ​​remains below or equal to a preset frequency threshold in each washing stage, the current washing task is considered complete. This process ensures precise control of water volume throughout the entire washing task.

[0039] In some possible embodiments, the controller is further configured to:

[0040] If the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value is greater than the preset frequency threshold during the target washing stage, an abnormal prompt message is output. The target washing stage can be any one of the various washing stages.

[0041] In the above technical solution, if the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value is greater than the preset frequency threshold when any washing stage is detected, it can be understood that the washing machine can no longer effectively change the liquid level position in the outer drum through operations such as water inlet or drainage, and output abnormal prompt information so that users or maintenance personnel can quickly intervene to check and solve potential problems.

[0042] In some possible embodiments, the washing machine further includes a memory, and after the controller corrects the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference, the controller is further configured to:

[0043] The corrected reference frequency values ​​corresponding to each washing stage of the washing machine are updated to the memory, and the update time is recorded.

[0044] The controller is also configured to:

[0045] When the washing machine starts a washing task, the update time stored in the memory is obtained;

[0046] If the interval between the current time and the update time stored in the memory is less than a preset time interval, the washing machine is controlled to operate according to the corrected reference frequency values ​​corresponding to each washing stage of the washing machine stored in the memory.

[0047] In the above technical solution, since it takes a certain amount of time to correct the reference frequency values ​​of each stage by starting the washing stage, and the reference frequency values ​​of each stage can usually remain unchanged for a long time after correction, the stored corrected reference frequency values ​​can be used to control the washing machine to perform the washing task within a preset time interval.

[0048] Compared to related technologies that directly control the water volume during washing based on the frequency detection value of the water level monitoring device, the washing machine provided in this application takes into account that the water level sensor may be affected by its own inherent error or external factors during use. It can use the water level detection device to detect the frequency of the liquid in the outer drum. During the start-up washing stage, once the liquid frequency reaches the preset initial frequency value, the inner drum is driven to rotate so that the clothes can absorb the liquid. Then, based on the difference between the target frequency value after the clothes absorb water and the reference frequency value corresponding to the start-up washing stage, the reference frequency of each washing stage is adjusted so that the liquid level position of each washing stage is close to the liquid level position under the ideal washing effect, thereby achieving precise control of the water intake. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the technical solutions of this application.

[0050] Figure 1 A schematic diagram of a washing machine provided in an embodiment of this application;

[0051] Figure 2 A schematic diagram of a system architecture for a washing machine provided in an embodiment of this application;

[0052] Figure 3 A schematic flowchart of a washing machine control method provided in an embodiment of this application;

[0053] Figure 4 A schematic diagram illustrating the detection frequency of the water level detection device provided in this application embodiment;

[0054] Figure 5 Another schematic flowchart of the washing machine control method provided in the embodiments of this application;

[0055] Figure 6 Another schematic flowchart of a washing machine control method provided in an embodiment of this application;

[0056] Figure 7 This is a schematic flowchart illustrating the determination of whether each washing stage is completed in the washing machine control method provided in the embodiments of this application.

[0057] Figure 8 This is a schematic diagram of a controller provided in an embodiment of this application. Detailed Implementation

[0058] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0059] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, "first instruction" and "second instruction" are used to distinguish different user instructions and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0060] It should be noted that, in this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] Furthermore, "at least one" refers to one or more, while "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0062] Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0063] During a washing cycle, a washing machine injects an appropriate amount of liquid into its interior based on the washing needs of different stages, such as the initial wash and rinsing stages. This liquid can be plain water or an aqueous solution containing a suitable amount of detergent. Controlling the amount of water used is crucial in each washing stage, directly affecting the washing results and the machine's energy and water consumption. If the washing machine uses more water than needed, it not only wastes water but also increases energy consumption, thus reducing its energy efficiency. Conversely, if the water is insufficient, clothes may not be adequately soaked and washed, directly impacting the washing performance.

[0064] In related technologies, drum washing machines generally use pneumatic water level sensors, which sense the liquid level by measuring and acquiring corresponding frequency values. In order to control the amount of water used during the washing process, different reference frequencies can be set for each washing stage according to their different needs. In this way, when the actual frequency value detected by the water level sensor in a certain washing stage matches the reference frequency of that washing stage, it can be confirmed that the liquid level in the outer drum of the washing machine has reached the required height for that stage.

[0065] However, due to manufacturing differences in the water level sensors themselves, structural differences in the design of different washing machine platforms, and performance changes that may occur due to aging or clogging, these factors can all affect the accuracy of the water level sensors and the consistency of their detection results. Therefore, even if the frequency value detected by the water level sensor at a certain washing stage matches the preset reference frequency, it cannot be guaranteed that the actual liquid level in the outer drum will be exactly the same as expected. It is possible that different washing machines, or even different stages of use of the same washing machine, may detect the same frequency value from the water level sensor, but the actual liquid level in the outer drum may differ. This results in inaccurate water usage control during the washing process, affecting washing performance and energy consumption.

[0066] In view of this, this application provides a washing machine, comprising: an outer drum for holding liquid required during washing machine operation; an inner drum disposed inside the outer drum for rotating during washing machine operation to clean clothes in the inner drum through the liquid; a controller connected to the inner drum for controlling the rotation of the inner drum; a water level detection device including an air chamber, an air pipe, and a water level sensor, the water level sensor being connected to the air chamber via the air pipe, the air chamber also being connected to the outer drum, for detecting changes in the liquid level in the outer drum; the controller being configured to: when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, control the inner drum to rotate for a preset rotation time to allow the clothes in the inner drum to absorb liquid; obtain a target frequency value of the liquid in the outer drum detected by the water level detection device; obtain the difference between the target frequency value and a reference frequency value corresponding to the start-up washing stage, and correct the reference frequency value corresponding to each washing stage of the washing machine based on the difference. During the initial washing phase, when the frequency value of the liquid level in the outer drum reaches the preset initial frequency value, the reference frequency value for each washing phase is corrected based on the difference between the target frequency value measured after the clothes absorb the liquid and the reference frequency value for that phase, thus achieving precise control of water consumption during the washing task.

[0067] To introduce the washing machine as described above, a structural schematic diagram of a washing machine according to an embodiment of this application is first presented to provide a full understanding of the working principle of the washing machine.

[0068] Please see Figure 1 , Figure 1 This is a schematic diagram of a washing machine provided in an embodiment of this application. The washing machine shown in the schematic diagram may include an outer drum 101, an inner drum 102, and a controller. Figure 1 (not shown in the image) and a water level detection device, which may include an air chamber 103, an air pipe 104, and a water level sensor 105.

[0069] In some possible embodiments, the washing machine is a drum washing machine, including an outer drum 101 and an inner drum 102.

[0070] In some possible embodiments, the outer tub 101 is typically made of stainless steel, plastic, or composite materials. The outer tub 101 surrounds and supports the inner tub 102, holds water, and provides protection. The water in the outer tub 101 is used for washing and cleaning clothes, preventing water from splashing out, while keeping the inner tub 102 isolated from the outside environment.

[0071] In some possible embodiments, the inner drum 102 is commonly made of stainless steel due to its corrosion resistance, wear resistance, and high strength. Some low-end washing machines may also use plastic. The inner drum 102 contains clothes, which are washed, rubbed, and spun dry by rotation. The rotation of the inner drum 102 drives the water flow, causing the clothes to rub and be cleaned by the detergent.

[0072] In one possible embodiment, a controller, connected to the inner drum 102, is used to control the rotation of the inner drum 102. The washing machine also includes a motor, which may consist of copper wire and an iron core, with a casing typically made of aluminum alloy or steel, to provide driving power to rotate the inner drum 102 under the control of the controller to achieve washing and spin-drying functions.

[0073] In some possible embodiments, the water level sensor 105 is a pneumatic water level sensor, and the water level detection device can be as follows: Figure 1 As shown, the air chamber 103 is generally located at the bottom of the washing machine, and the water level sensor 105 is placed at the top of the washing machine, connected by an air pipe 104. When water is filled into the outer drum 101, the air chamber 103 is submerged, and the air in the air chamber 103 and the air pipe 104 is sealed, forming a closed air section. As the water level rises, the closed air is compressed, and its pressure corresponds to the water level in the drum. The water level sensor 105 converts this pressure into an electrical signal, which can be expressed as a frequency value, thereby completing the sensing of the liquid level position in the outer drum 101.

[0074] In some possible embodiments, the controller can connect to each component through internal wiring of the washing machine to obtain the operating parameters of each component in order to adjust the operation of the washing machine.

[0075] In some possible embodiments, the washing machine also includes a water inlet, a drain outlet, and a drain pump to allow for the introduction and discharge of water inside and outside the washing machine.

[0076] In some possible embodiments, the washing machine also includes a soap dish, which is usually made of plastic and is used to store detergents such as laundry liquid or laundry powder. During the washing process, the soap dish can add detergent to the water, dissolve it evenly, and come into contact with the clothes to achieve a cleaning effect. The soap dish can usually be connected to the outer drum 101 or to the water inlet via a hose or pipe.

[0077] The above schematic diagram of the washing machine structure can help you understand the working mode of the washing machine. The controller can correct the reference frequency value of each washing stage based on the water level change in the outer drum 101 sensed by the water level detection device (including air chamber 103, air pipe 104 and water level sensor 105) and the rotation state of the inner drum 102. It can cope with possible errors in water level detection and ensure accurate control of water consumption in the washing task.

[0078] Please see Figure 2 , Figure 2This is a schematic diagram of a system architecture for a washing machine provided in an embodiment of this application. The system architecture of the washing machine may include, but is not limited to, components such as a controller 201, a water level sensor 202, an inner drum control device 203, a communication device 204, and a memory 205. The system architecture of the washing machine may also include more or fewer components than shown, or combine certain components, or arrange different components.

[0079] The controller 201 is the control center of the washing machine. It connects all parts of the washing machine via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 205, and by calling data stored in the memory 205, it performs various functions and processes data, thereby providing overall monitoring of the washing machine. Optionally, the controller 201 may include one or more processing units; preferably, the controller 201 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the controller 201.

[0080] The water level sensor 202 is used to detect changes in the water level inside the outer drum, so that the controller 201 can correct the reference frequency value corresponding to different washing stages based on the water level changes collected by the water level sensor.

[0081] The inner cylinder control device 203 may consist of a motor and a transmission device, used to drive the inner cylinder to operate according to the rotation mode and / or speed determined by the controller 201.

[0082] Communication device 204 is a component used to communicate with external devices or servers according to various communication protocol types. For example, communication device 204 may include at least one of the following: a wireless communication technology (WiFi) module, a Bluetooth module, a wired Ethernet module, and a near-field communication (NFC) module, or other network communication protocol chips or NFC protocol chips, as well as an infrared receiver. Communication device 204 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.).

[0083] The memory 205 can be used to store software programs and modules. The controller 201 executes various functional applications and data processing of the electronic device by running the software programs and modules stored in the memory 205. The memory 205 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (e.g., control logic when each component performs a washing task), etc.; the data storage area may store data generated according to the use of the washing machine (e.g., frequency values ​​detected by the water level sensor 202), etc. In addition, the memory 205 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0084] In some possible embodiments, the communication device 204 is connected to the controller 201. The controller 201 can communicate with the user's terminal device (such as a mobile phone) through the communication device to obtain the user's adjustment commands for the washing machine and realize remote control of the washing machine.

[0085] In some possible embodiments, the system architecture of the washing machine may also include a timer to detect the operating time of each electrical component, such as the detection time of the water level sensor 202, the operating time of the inner drum control device 203, etc., and store the acquired duration information in the memory 205. The timer can also be used to realize functions such as timed opening or closing of the washing machine, which is not limited here.

[0086] By introducing the system architecture and other hardware aspects of the electronic device, the functions of each component of the washing machine can be understood. The following section further describes how the controller of the washing machine provided in this application corrects the reference frequency values ​​corresponding to each washing stage.

[0087] Please see Figure 3 , Figure 3 A schematic flowchart of a washing machine control method provided in this application embodiment, the method may include the following steps:

[0088] S301, when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, the inner drum is controlled to rotate for a preset rotation time so that the clothes in the inner drum absorb the liquid.

[0089] In some possible embodiments, the initial washing stage can be the washing stage after the user puts clothes into the washing machine drum and selects a washing program, during which liquid is first injected into the outer drum. This stage ensures that the clothes are relatively dry to facilitate liquid absorption and is used to correct the corresponding reference frequency values ​​for each subsequent washing stage in the washing task.

[0090] In some possible embodiments, the washing machine's washing task includes, in addition to the initial washing phase, multiple closely linked washing phases, which may include, but are not limited to, a pre-wash water intake phase, a main wash water intake and washing phase, a rinsing phase, and a spin-drying phase, to ensure that clothes are effectively cleaned. The initial washing phase may be set before the pre-wash water intake phase.

[0091] The washing machine's cleaning process is as follows: In the pre-wash stage, an appropriate amount of liquid, either clean water or a detergent-containing solution, is injected to initially moisten the clothes and remove some surface dirt and impurities. This pre-wash stage is usually accompanied by gentle agitation or rotation to help the detergent better penetrate the clothing fibers. The main wash stage follows immediately after the pre-wash stage. In this stage, the washing machine injects more liquid than in the pre-wash stage, according to the user-set program parameters. The inner drum then rotates at a specific speed and pattern, cleaning the clothes through water flow and friction between the clothes and the drum wall. The rinsing stage occurs after the main wash stage. The washing machine typically injects clean water multiple times, accompanied by gentle agitation or rotation, to remove residual detergent and other chemicals from the clothes. The spin-drying stage occurs after the rinsing stage. The inner drum rotates at high speed, using centrifugal force to expel water from the clothes, achieving a certain degree of dryness.

[0092] It should be noted that the liquid injected into the outer drum of the washing machine in this application can be clean water or an aqueous solution containing an appropriate amount of detergent, depending on the user's washing needs and the program design of the washing machine, and is not limited here.

[0093] In this embodiment, when the frequency value detected by the water level detection device is a preset initial frequency value, the actual liquid level corresponding to this preset initial frequency value should be higher than the bottom of the inner drum. This setting allows the clothes in the inner drum to absorb liquid above the bottom of the drum, ensuring that the actual liquid level after some liquid is absorbed by the clothes reaches the bottom of the inner drum. Without the aid of other sensors, a stable liquid level is obtained as a reference point, and the corresponding reference frequency value is corrected for each washing stage based on this reference point.

[0094] In order for the clothes in the inner drum to absorb the liquid, and to ensure that the liquid level is at the bottom of the inner drum after the clothes have absorbed the liquid, an accurate position that can be used as a reference is determined.

[0095] In some possible embodiments, the higher the frequency value detected by the water level detection device, the lower the liquid level in the outer cylinder. To ensure that the actual liquid level corresponding to the preset initial frequency value should be higher than the bottom of the inner cylinder, the preset initial frequency value can be appropriately reduced.

[0096] In this embodiment of the application, when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, controlling the inner drum to rotate for a preset rotation time can enable the clothes to absorb the liquid more fully and make the liquid level of the clothes after absorbing the liquid as close as possible to the bottom of the inner drum.

[0097] S302, Obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device.

[0098] In this embodiment, the target frequency value is the frequency value measured by the water level detection device after the inner drum has completed its rotation for a preset time. After determining that the frequency has reached the preset initial frequency value, during the period until the target frequency value is obtained, liquid is stopped from being added to the inner drum, and the drain outlet of the washing machine is closed.

[0099] Understandably, if the clothing can absorb all the liquid above the plane where the bottom of the inner drum is located, the liquid level in the outer drum will drop precisely to the same level as the bottom of the inner drum, thereby achieving the correlation between the target frequency value and the liquid level position corresponding to the bottom of the inner drum.

[0100] In practical applications, due to factors such as the material, thickness, and absorbency of clothing, the garments may not absorb all the liquid above the bottom of the drum. This results in the actual liquid level still being higher than the bottom of the drum when the target frequency value is detected, affecting the optimization effect of water volume control based on the target frequency value in each washing stage. This can be addressed by increasing the preset rotation time of the drum to promote more complete liquid absorption by the clothes, or by adjusting the preset initial frequency value so that the actual liquid level at that preset initial frequency value is not only higher than the bottom of the drum, but also that the excess liquid is absorbed by the clothes as much as possible.

[0101] S303, obtain the difference between the target frequency value and the reference frequency value corresponding to the start washing stage, and correct the reference frequency value corresponding to each washing stage of the washing machine based on the difference.

[0102] In the embodiments of this application, for the washing stages in the washing task that require the addition of liquid, such as the start-up washing stage, the pre-wash water intake stage, the main wash water intake and washing stage, and the rinsing stage, a reference frequency value corresponding to the washing stage is included.

[0103] The reference frequency values ​​for each washing stage can be obtained by the controller based on the washing program corresponding to the washing task. When selecting washing programs such as cotton fabric washing, large item washing, or wool washing, the controller will automatically call the reference frequency values ​​for each stage corresponding to that program to ensure optimal washing effect and water-saving performance under different materials, stain levels, and washing requirements. This can be understood as the reference frequency value corresponding to any washing stage being designed and verified through extensive experiments to provide a relatively ideal liquid injection reference for that washing stage, thereby minimizing water waste while ensuring washing effect. However, due to differences in the manufacturing of the water level sensor itself, structural differences in the design of different washing machine platforms, and performance changes that may be caused by aging, clogging, etc., there may be a deviation between the actual liquid level in the outer drum and the ideal liquid level under laboratory conditions when the frequency value of the washing stage measured by the washing machine's water level detection device reaches the reference frequency value for that washing stage. This deviation can affect the washing effect and energy consumption of the washing machine.

[0104] Please see Figure 4 , Figure 4 This is a schematic diagram illustrating the detection frequency of the water level detection device provided in an embodiment of this application. Figure 4 As shown, the liquid level position corresponding to the preset initial frequency value is the liquid level position in the outer drum of the washing machine provided in this application when the detected frequency value is the preset initial frequency value. The liquid level position corresponding to this preset initial frequency value is higher than the liquid level position corresponding to the bottom of the inner drum, so that the clothes ( Figure 4 (As shown in the middle) It can absorb liquid that is above the liquid level corresponding to the bottom of the inner cylinder.

[0105] It should be noted that, during the start-up washing phase, the theoretical liquid level is the liquid level that should be reached under ideal, error-free conditions when the washing machine fills the machine with water based on a reference frequency value.

[0106] In some possible embodiments, the reference frequency value corresponding to the start of the washing phase is the theoretical frequency value at which the liquid in the outer drum reaches the bottom of the inner drum. That is, when the frequency value read by the water level detection device is the reference frequency value corresponding to the start of the washing phase, the liquid in the outer drum should reach the bottom of the inner drum under ideal error-free conditions.

[0107] In some possible embodiments, the reference frequency value corresponding to the start of the washing phase is the theoretical frequency value corresponding to the liquid in the outer drum reaching the bottom of the inner drum, and the preset initial frequency value is determined based on the reference frequency value and the preset fault tolerance frequency corresponding to the water level detection device.

[0108] It should be noted that the preset fault tolerance frequency represents the maximum detection deviation that the water level detection device may encounter during normal operation. Taking a washing machine water level detection device as an example, if its preset fault tolerance frequency is 200Hz, it means that the maximum difference between the frequency value detected by the device in actual application and the frequency value accurately measured under laboratory conditions will not exceed 200Hz.

[0109] In some possible embodiments, the higher the frequency value detected by the water level detection device, the lower the liquid level position. The preset initial frequency value is determined by subtracting the absolute value of the preset fault-tolerant frequency corresponding to the water level detection device from the reference frequency value, ensuring that the liquid level position corresponding to the preset initial frequency value can be higher than the bottom of the inner cylinder.

[0110] By measuring the difference between the target frequency value and the reference frequency value corresponding to the start of the washing cycle, we can understand the deviation between the actual measured target frequency value and the theoretical reference frequency value at the liquid level exactly at the bottom of the inner drum. This deviation also applies to the analysis of other liquid level positions. In other words, the difference between the target frequency value and the reference frequency value corresponding to the start of the washing cycle is equivalent to the difference between the actual detected frequency value at a specified liquid level position and the theoretical reference frequency value at that position in other washing cycles. Therefore, the difference between the target frequency value obtained during the start of the washing cycle and the corresponding reference frequency value can be used to correct the reference frequency values ​​for each washing cycle of the washing machine.

[0111] The above embodiments describe a washing machine control method applied to a controller for a washing machine. It can use a water level detection device to detect the frequency value of the liquid in the outer drum. During the start-up washing stage, once the liquid frequency reaches the preset initial frequency value, the inner drum is driven to rotate so that the clothes absorb the liquid. Then, based on the difference between the target frequency value after the clothes absorb water and the reference frequency value corresponding to the start-up washing stage, the reference frequency of each washing stage is adjusted so that the liquid level position of each washing stage is close to the liquid level position under the ideal washing effect, thereby achieving precise control of the water intake.

[0112] The following examples further illustrate how the controller ensures that the clothes in the inner drum can fully absorb the liquid above the bottom of the inner drum.

[0113] Please see Figure 5 , Figure 5 Another schematic flowchart of a washing machine control method provided in this application embodiment, the method may include the following steps:

[0114] S501: When the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, the weight value detected by the weighing sensor is obtained.

[0115] In some possible embodiments, the washing machine further includes a load sensor for detecting the load on the inner drum, and the controller controls the inner drum to rotate for a preset rotation time, configured as follows:

[0116] Obtain the weight value detected by the load cell;

[0117] If the weight value is greater than the preset weight threshold, and the weight change value detected by the weighing sensor within the target time is less than the preset change threshold, the inner cylinder is controlled to rotate for a preset rotation time.

[0118] Optionally, the load cell can be installed on the bottom support structure of the washing machine or at the connection between the inner and outer drums, and can directly sense and detect the load on the inner drum.

[0119] Understandably, whether liquid is added from the bottom of the washing machine drum or by spraying it from the top or side of the drum, the controller can identify whether there is a load of clothes in the inner drum by the weight value detected by the weighing sensor.

[0120] S502, when the weight value is greater than the preset weight threshold, control the inner cylinder to rotate for a preset rotation time.

[0121] In some embodiments, a preset weight threshold can be set to determine the load of clothing in the inner drum. If the weight value is greater than the preset weight threshold, it is determined that there is clothing in the inner drum and that it can absorb liquid above the bottom of the inner drum, thereby optimizing water volume control. The preset weight threshold can be obtained based on multiple experiments and data verification, and is not limited here.

[0122] If the weight value is less than or equal to the preset weight threshold, the washing program may be accidentally activated when the drum is empty, or the inner drum may contain only a small amount of clothes, which may not be able to effectively absorb liquid above the bottom of the inner drum. In this case, the original control logic can be used to perform the washing task, and the reference frequency value corresponding to each washing stage will no longer be corrected by the difference between the target frequency value and the reference frequency value corresponding to the start washing stage.

[0123] In some possible embodiments, the controller controls the inner cylinder to rotate for a preset rotation time, which is configured as follows:

[0124] Based on the preset start-stop ratio and preset speed, the inner cylinder is controlled to rotate for a preset rotation time. The preset start-stop ratio is the ratio between the start rotation time and the stop rotation time.

[0125] It is understandable that when the target frequency value of the liquid in the outer drum is detected by the water level detection device, the closer the liquid level in the outer drum is to the bottom of the inner drum, the more accurate the water volume control of the washing machine will be after the reference frequency values ​​corresponding to each washing stage are corrected by the washing machine control method provided in this application. By controlling the rotation of the inner drum for a preset rotation time through preset on / off ratio and preset speed, the clothes in the inner drum can be made to roll at the bottom of the inner drum to fully absorb the liquid.

[0126] For example, the preset rotation time can be set to 60 seconds, the preset rotation speed to 45 revolutions per minute, and the preset start-stop ratio, that is, the ratio between the start rotation time and the stop rotation time is 10 seconds: 5 seconds. In this way, the inner drum rotates for 10 seconds and then stops for 5 seconds to ensure that the clothes in the inner drum can fully absorb the liquid.

[0127] S503, obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device.

[0128] S504, obtain the difference between the target frequency value and the reference frequency value corresponding to the start washing stage, and correct the reference frequency value corresponding to each washing stage of the washing machine based on the difference.

[0129] In some possible embodiments, the washing machine further includes a memory, and after the controller corrects the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference, the controller is further configured to:

[0130] The corrected reference frequency values ​​corresponding to each washing stage of the washing machine are updated to the memory, and the update time is recorded.

[0131] The controller is also configured to:

[0132] When the washing machine starts a washing task, the update time stored in the memory is obtained;

[0133] If the interval between the current time and the update time stored in the memory is less than a preset time interval, the washing machine is controlled to operate according to the corrected reference frequency values ​​corresponding to each washing stage of the washing machine stored in the memory.

[0134] Understandably, during the initial washing cycle, controlling the frequency of liquid injection into the outer drum to reach the preset initial frequency value and controlling the inner drum to rotate and absorb water from the clothes takes time. After correcting the reference frequency values ​​for each washing stage, these values ​​typically don't change easily unless there's a sudden malfunction in the water level detection device, such as damage to the water level sensor, air chamber, or air pipe. Therefore, the corrected reference frequency values ​​for each washing stage obtained during a washing cycle can be stored, and the update time recorded. This way, within a preset time interval (e.g., 3 months or 6 months), there's no need to retrieve them again; the washing machine can be controlled based on the corrected reference frequency values ​​for each washing stage stored in the memory. Optionally, when starting a washing cycle, the initial washing stage can be skipped, and the washing cycle can begin from another washing stage, such as the pre-wash water intake stage. This improves washing efficiency.

[0135] The above embodiments describe a washing machine control method applied to a controller of a washing machine, which can improve the accuracy of water volume control by controlling the rotation of the inner drum, allowing the clothes in the inner drum to fully absorb liquid.

[0136] The following examples further illustrate how the controller corrects the reference frequency values ​​corresponding to each washing stage of the washing machine.

[0137] Figure 6 This is another schematic flowchart of a washing machine control method provided in an embodiment of this application. The method may include the following steps:

[0138] S601, when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, controls the inner drum to rotate for a preset rotation time so that the clothes in the inner drum absorb the liquid.

[0139] S602, Obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device.

[0140] S603, obtain the difference between the target frequency value and the reference frequency value corresponding to the start of the washing stage.

[0141] S604, detect the current washing stage of the washing machine, and obtain the target reference frequency value corresponding to the current washing stage according to the first mapping relationship.

[0142] In some possible embodiments, the washing machine further includes a memory for storing a first mapping relationship between preset washing stages and preset reference frequency values. The controller can detect the current washing stage of the washing machine and obtain the target reference frequency value corresponding to the current washing stage based on the first mapping relationship stored in the memory.

[0143] S605, the target reference frequency value is corrected based on the sum of the target reference frequency value and the difference.

[0144] In some possible embodiments, the controller corrects the target reference frequency value based on the sum of the target reference frequency value and the difference, and is configured to:

[0145] The sum of the target reference frequency value and the difference is determined as the corrected target reference frequency value.

[0146] In this way, by summing the target reference frequency value and the difference, the summation result is determined as the corrected target reference frequency value. This allows the control to add liquid to the inner drum according to the corrected target reference frequency value, thus reducing the gap between the actual liquid level and the ideal liquid level expected in the current washing stage, thereby improving the accuracy of water volume control.

[0147] In some possible embodiments, the memory is further configured to store a second mapping relationship between a preset operating mode and a preset correction value, wherein the controller corrects the target reference frequency value based on the sum of the target reference frequency value and the difference, and is configured to:

[0148] The current operating mode of the washing machine is detected, and the target correction value is determined based on the current operating mode and the second mapping relationship.

[0149] The sum of the target reference frequency value, the difference, and the target correction value is determined as the corrected target reference frequency value.

[0150] It should be noted that the washing machine's operating modes may include, but are not limited to, quick wash, gentle wash, and deep wash modes. Different operating modes may have different water requirements when facing the same load of clothes and washing stage. The controller can determine a target correction value matching the current operating mode based on a second mapping relationship stored in its memory. Thus, when correcting the target reference frequency value for the current washing stage, the target reference frequency value, the difference, and the target correction value are summed, and the sum is used as the corrected target reference frequency value. This ensures that the washing machine, when controlling water volume in the current washing stage, refers to the water requirements of different operating modes, ensuring that the amount of liquid added matches the washing needs, thereby improving washing performance and conserving water resources.

[0151] The above embodiments describe a washing machine control method applied to a controller of a washing machine, which can correct the reference frequency values ​​corresponding to each washing stage of the washing machine to achieve precise water volume control.

[0152] The following examples further illustrate how the controller monitors each washing stage of a washing task.

[0153] Figure 7A schematic flowchart illustrating the determination of whether each washing stage is completed in the washing machine control method provided in this application embodiment. The method may include the following steps:

[0154] S701, when the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, controls the inner drum to rotate for a preset rotation time so that the clothes in the inner drum absorb the liquid.

[0155] S702, Obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device.

[0156] S703, obtain the difference between the target frequency value and the reference frequency value corresponding to the start washing stage, and correct the reference frequency value corresponding to each washing stage of the washing machine based on the difference.

[0157] S704, based on the corrected reference frequency values ​​corresponding to each washing stage of the washing machine, detects the stage frequency value of the liquid in the outer drum during each washing stage using a water level detection device.

[0158] It should be noted that after correcting the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference, the controller can control the liquid to enter or exit the washing machine according to the corrected reference frequency value corresponding to each stage. The stage frequency value is the actual frequency value detected by the water level detection device in each washing stage.

[0159] S705, if the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value in each washing stage is less than or equal to the preset frequency threshold, the current washing task is completed. The current washing task includes each washing stage.

[0160] Understandably, although the controller controls the liquid entering or exiting the washing machine according to the corrected reference frequency value corresponding to each stage, in actual operation, the opening and closing of the water inlet and outlet are not instantaneous, but require a relatively short response time. This results in a certain delay between the controller issuing the command and the actual water flow entering or exiting the washing machine. Therefore, in each washing stage, there may be a difference between the stage frequency value detected by the water level detection device and the expected corrected reference frequency value. If the difference between the stage frequency value and the corrected reference frequency value in each washing stage is less than or equal to the preset frequency threshold, the current washing task can be confirmed as complete, and accurate water control is achieved.

[0161] In some possible embodiments, the controller is also configured to:

[0162] If the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value is greater than the preset frequency threshold during the target washing stage, an abnormal prompt message will be output. The target washing stage can be any one of the various washing stages.

[0163] It should be noted that if, during any washing stage, the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value is greater than the preset frequency threshold, it can be understood that the washing machine is no longer able to effectively change the liquid level in the outer drum through operations such as water intake or drainage. An abnormal prompt message will be output so that users or maintenance personnel can quickly intervene to check and resolve potential problems.

[0164] Please see Figure 8 , Figure 8 This is a schematic diagram of a controller provided in an embodiment of this application. The controller may include a processor, memory, bus, and device interface.

[0165] The processor calls the executable program code stored in the memory to execute any of the air conditioner control methods disclosed in the embodiments of this application.

[0166] The memory stores executable program code, which is executed by the processor to implement any of the air conditioner control methods disclosed in the embodiments of this application.

[0167] The bus is used to transfer program code stored in memory to the processor for execution.

[0168] The device interface connects to the bus and is used to enable the processor and memory to connect to other devices.

[0169] Optionally, the memory may include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor can be used to execute instructions stored in the memory, and when the processor executes the instructions, the processor can perform the various steps and / or processes corresponding to the terminal device in the above method embodiments.

[0170] Optionally, the memory can be located outside the controller and communicate with the controller.

[0171] It should be understood that, in the embodiments of this application, the processor may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0172] It should be noted that, Figure 8 The controller shown may also include components not shown, such as a power supply, which will not be described in detail in this embodiment.

[0173] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor executes the instructions in the memory, combining them with its hardware to complete the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0174] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software 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 application.

[0175] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0176] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0177] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0178] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0179] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to related technologies, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0180] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology 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 laundry machine characterized by, The washing machine includes: The outer tub is used to hold the liquid required during the operation of the washing machine; An inner drum, disposed inside the outer drum, is used to rotate during the operation of the washing machine to clean the clothes in the inner drum with the liquid; A controller, connected to the inner cylinder, is used to control the rotation of the inner cylinder; A water level detection device, comprising an air chamber, an air pipe, and a water level sensor, wherein the water level sensor is connected to the air chamber via the air pipe, and the air chamber is also connected to an outer cylinder, for detecting changes in the liquid level in the outer cylinder; The controller is configured to: When the washing machine is in the start-up washing stage and the frequency value detected by the water level detection device is a preset initial frequency value, the inner drum is controlled to rotate for a preset rotation time so that the clothes in the inner drum absorb the liquid. Obtain the target frequency value of the liquid in the outer cylinder detected by the water level detection device; The difference between the target frequency value and the reference frequency value corresponding to the start washing stage is obtained, and the reference frequency value corresponding to each washing stage of the washing machine is corrected according to the difference.

2. A laundry washing machine according to Claim 1, characterized in that The reference frequency value corresponding to the start-up washing stage is the theoretical frequency value corresponding to the liquid in the outer drum reaching the bottom of the inner drum. The preset initial frequency value is determined based on the reference frequency value and the preset fault tolerance frequency corresponding to the water level detection device.

3. A laundry washing machine according to Claim 1, characterized in that The washing machine also includes a weighing sensor for detecting the load on the inner drum. The controller controls the rotation of the inner drum for a preset rotation time, and is configured as follows: Obtain the weight value detected by the weighing sensor; If the weight value is greater than a preset weight threshold, the inner cylinder is controlled to rotate for the preset rotation time.

4. A laundry machine according to claim 1, characterized in that, The controller controls the inner cylinder to rotate for a preset rotation time, and is configured as follows: The inner cylinder is controlled to rotate for a preset rotation duration based on a preset start-stop ratio and a preset rotation speed. The preset start-stop ratio is the ratio between the start rotation duration and the stop rotation duration.

5. A laundry washing machine according to any one of the preceding claims, characterized in that, The washing machine further includes a memory for storing a first mapping relationship between preset washing stages and preset reference frequency values. The controller is configured to correct the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference. The washing stage currently being performed by the washing machine is detected, and a target reference frequency value corresponding to the current washing stage is obtained based on the first mapping relationship. The target reference frequency value is corrected based on the sum of the target reference frequency value and the difference.

6. A laundry washing machine according to Claim 5, characterized in that The controller is configured to correct the target reference frequency value based on the sum of the target reference frequency value and the difference, and is as follows: The sum of the target reference frequency value and the difference is determined as the corrected target reference frequency value.

7. A laundry washing machine according to Claim 5, characterized in that The memory is further configured to store a second mapping relationship between a preset operating mode and a preset correction value, wherein the controller corrects the target reference frequency value based on the sum of the target reference frequency value and the difference, and is configured as follows: The current operating mode of the washing machine is detected, and a target correction value is determined based on the current operating mode and the second mapping relationship. The sum of the target reference frequency value, the difference, and the target correction value is determined as the corrected target reference frequency value.

8. A laundry washing machine according to any one of claims 1 to 4, characterized in that, The controller is also configured to: Based on the corrected reference frequency values ​​corresponding to each washing stage of the washing machine, the stage frequency value of the liquid in the outer drum during each washing stage is detected by the water level detection device. If the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value in each washing stage is less than or equal to a preset frequency threshold, the current washing task is completed. The current washing task includes each washing stage.

9. A laundry washing machine according to Claim 8, characterized in that The controller is also configured to: If the difference between the stage frequency value of the liquid in the outer drum and the corrected reference frequency value is greater than the preset frequency threshold during the target washing stage, an abnormal prompt message is output. The target washing stage can be any one of the various washing stages.

10. A laundry washing machine according to Claim 1, characterized in that The washing machine also includes a memory, and after the controller corrects the reference frequency values ​​corresponding to each washing stage of the washing machine based on the difference, the controller is further configured to: The corrected reference frequency values ​​corresponding to each washing stage of the washing machine are updated to the memory, and the update time is recorded. The controller is also configured to: When the washing machine starts a washing task, the update time stored in the memory is obtained; If the interval between the current time and the update time stored in the memory is less than a preset time interval, the washing machine is controlled to operate according to the corrected reference frequency values ​​corresponding to each washing stage of the washing machine stored in the memory.

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