A laundry machine spin control method, apparatus, laundry machine, and storage medium

Abstract

The embodiment of the application discloses a kind of washing machine dewatering control method, device, washing machine and storage medium, the method comprises: in the process of executing dewatering function, the rotating speed of the inner tube of washing machine is promoted to first preset rotating speed, and the inner tube is controlled to drain water;After running for first preset duration at first preset rotating speed, it is determined whether washing machine is drained;After determining that washing machine is drained, the rotating speed of the inner tube is reduced to second preset rotating speed, and the inner tube is injected with water;After the water level of the inner tube reaches preset water level, the rotating speed of the inner tube is promoted to third preset rotating speed, and the water level fluctuation amplitude of preset water level is obtained;If water level fluctuation amplitude does not exceed fluctuation amplitude threshold, high-speed dewatering operation is performed.Effective to avoid the eccentricity aggravation caused by incomplete drainage, greatly reduce the vibration and risk of hitting barrel in the dewatering process, improve the reliability and service life of washing machine work.

Description

Technical Field

[0001] This invention relates to the field of washing machine spin-drying technology, and in particular to a washing machine spin-drying control method, a washing machine spin-drying control device, a washing machine, and a computer-readable storage medium. Background Technology

[0002] In existing washing machine technology, especially during the spin-drying process of drum washing machines, there is a problem of failing to detect low-speed eccentricity errors caused by diagonal offset. The unbalanced distribution of clothes along the diagonal of the drum can create a false sense of balance during low-speed rotation, causing the system to misjudge that the load is evenly distributed, thus allowing high-speed spin-drying. Once high-speed spin-drying begins, the true eccentricity will cause severe vibrations. Furthermore, the drainage process relies on a fixed duration, which can easily lead to incomplete drainage or misjudgment of completion.

[0003] Continuing to operate the washing machine without proper drainage or excessive vibration can easily lead to malfunctions such as drum collisions or displacement, affecting the stability and lifespan of the washing machine. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a washing machine spin-drying control method, a washing machine spin-drying control device, a washing machine, and a computer-readable storage medium that overcome or at least partially solve the above problems.

[0005] To address the aforementioned problems, a first aspect of this invention provides a washing machine spin-drying control method, the method comprising:

[0006] During the spin-drying process, the rotation speed of the inner drum of the washing machine is increased to a first preset speed, and the inner drum is controlled to drain water.

[0007] After running continuously at the first preset speed for a first preset time, it is determined whether the washing machine has completed draining;

[0008] After confirming that the washing machine has finished draining, the rotation speed of the inner drum is reduced to a second preset speed, and water is injected into the inner drum;

[0009] After the water level in the inner cylinder reaches the preset water level, the rotation speed of the inner cylinder is increased to the third preset rotation speed, and the water level fluctuation amplitude of the preset water level is obtained.

[0010] If the water level fluctuation does not exceed the fluctuation threshold, then a high-speed dehydration operation is performed.

[0011] Optionally, increasing the rotation speed of the washing machine's inner drum to a first preset rotation speed includes:

[0012] Obtain the current load weight inside the washing machine;

[0013] Based on the current load weight, determine the lifting acceleration of the inner cylinder;

[0014] Based on the acceleration, the rotational speed of the inner cylinder is increased to a first preset rotational speed.

[0015] Optionally, controlling the inner cylinder to drain water includes:

[0016] During operation at the first preset speed, the water level or water pressure change of the inner cylinder is monitored;

[0017] If the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range, the inner cylinder is controlled to drain water.

[0018] If the fluctuation value of the water level or the water pressure is not within the preset stable fluctuation range, the inner cylinder is controlled to continue running at the first preset speed until the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range.

[0019] Optionally, determining whether the washing machine has completed draining after running continuously at the first preset rotation speed for a first preset duration includes:

[0020] The washing machine is periodically weighed to obtain multiple weight values;

[0021] Based on the multiple weighing values, it is determined whether the washing machine has completed draining.

[0022] Optionally, determining whether the washing machine has finished draining based on the plurality of weighing values ​​includes:

[0023] When the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold, the washing machine is determined to have completed draining.

[0024] Optionally, the method further includes:

[0025] When the water level fluctuation amplitude of the preset water level is obtained at the third preset rotation speed, the vibration acceleration of the inner cylinder is obtained;

[0026] When the water level fluctuation exceeds the fluctuation amplitude threshold, and / or the vibration acceleration exceeds the acceleration threshold, a leveling intervention operation is performed; the leveling intervention operation includes controlling the washing machine to stop running and issuing a prompt message to guide the user to redistribute the load or adjust the position of the washing machine.

[0027] Optionally, before performing the high-speed dehydration operation, the following steps are also included:

[0028] Weigh the load inside the washing machine to obtain the load weight before spin-drying;

[0029] Determine the difference between the pre-dehydration load weight and the last of a plurality of weighing values ​​obtained by periodically weighing the washing machine;

[0030] The difference is used to determine whether the inner cylinder performs the high-speed dehydration operation.

[0031] Optionally, determining whether the inner cylinder performs a high-speed dehydration operation based on the difference includes:

[0032] If the difference does not exceed the second weight change threshold, then the high-speed dehydration operation is performed;

[0033] If the difference exceeds the second weight change threshold, the process returns to the operation of increasing the rotation speed of the inner cylinder to the first preset rotation speed.

[0034] Optionally, the fluctuation amplitude threshold is determined based on the current load weight inside the washing machine and / or the third preset rotation speed.

[0035] According to a second aspect of the present invention, a washing machine spin-drying control device is provided, the device comprising:

[0036] The inner drum speed control module is used to increase the rotation speed of the inner drum of the washing machine to a first preset speed during the spin-drying function and control the inner drum to drain water.

[0037] The inner drum drainage determination module is used to determine whether the washing machine has completed drainage after running continuously for a first preset time at the first preset speed.

[0038] The inner drum speed reduction control module is used to control the rotation speed of the inner drum to decrease to a second preset speed after determining that the washing machine has finished draining, and to inject water into the inner drum;

[0039] The water level fluctuation amplitude acquisition module is used to increase the rotation speed of the inner cylinder to a third preset rotation speed after the water level in the inner cylinder reaches a preset water level, and to acquire the water level fluctuation amplitude of the preset water level.

[0040] The dehydration operation execution module is used to execute a high-speed dehydration operation if the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold.

[0041] Optionally, the inner cylinder speed control module includes:

[0042] The current load weight acquisition submodule is used to acquire the current load weight inside the washing machine;

[0043] The acceleration determination submodule is used to determine the acceleration of the inner cylinder based on the current load weight;

[0044] The inner cylinder rotation speed enhancement submodule is used to increase the rotation speed of the inner cylinder to a first preset rotation speed according to the acceleration.

[0045] Optionally, the inner cylinder speed control module includes:

[0046] The water level and pressure monitoring submodule is used to monitor the water level or water pressure changes of the inner cylinder during operation at the first preset rotation speed.

[0047] The inner cylinder drainage control submodule is used to control the inner cylinder to drain water if the fluctuation value of the water level or the water pressure is within a preset stable fluctuation range; if the fluctuation value of the water level or the water pressure is not within the preset stable fluctuation range, the inner cylinder is controlled to continue running at the first preset speed until the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range.

[0048] Optionally, the inner cylinder drainage determination module includes:

[0049] The load weighing submodule is used to periodically weigh the washing machine and obtain multiple weighing values;

[0050] The washing machine drainage determination submodule is used to determine whether the washing machine has completed drainage based on the multiple weighing values.

[0051] Optionally, the washing machine drainage determination submodule includes:

[0052] The drainage completion determination unit is used to determine that the washing machine has completed drainage when the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold.

[0053] Optionally, the device further includes:

[0054] The vibration acceleration acquisition module is used to acquire the vibration acceleration of the inner cylinder when the water level fluctuation amplitude of the preset water level is acquired at the third preset rotation speed.

[0055] An intervention operation execution module is used to perform a leveling intervention operation when the water level fluctuation exceeds the fluctuation amplitude threshold and / or the vibration acceleration exceeds the acceleration threshold; the leveling intervention operation includes controlling the washing machine to stop running and issuing a prompt message to guide the user to redistribute the load or adjust the position of the washing machine.

[0056] Optionally, before performing the high-speed dehydration operation, the apparatus further includes:

[0057] The pre-spin-dry load weighing module is used to weigh the load inside the washing machine and obtain the load weight before spin-drying.

[0058] The weighing value difference determination module is used to determine the difference between the pre-dehydration load weight and the last weighing value among multiple weighing values ​​obtained by periodically weighing the washing machine;

[0059] The dehydration execution determination module is used to determine whether the inner cylinder should perform the high-speed dehydration operation based on the difference.

[0060] Optionally, the dehydration execution determination module includes:

[0061] The dehydration operation judgment submodule is used to execute the high-speed dehydration operation if the difference does not exceed the second weight change threshold; and to return to the operation of increasing the rotation speed of the inner cylinder to the first preset rotation speed if the difference exceeds the second weight change threshold.

[0062] Optionally, the fluctuation amplitude threshold is determined based on the current load weight inside the washing machine and / or the third preset rotation speed.

[0063] According to a third aspect of the present invention, a washing machine is provided, comprising: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the washing machine spin-drying control method as described in any of the preceding embodiments.

[0064] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the washing machine spin-drying control method as described in any of the preceding embodiments.

[0065] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0066] This invention discloses a washing machine spin-drying control method, device, washing machine, and storage medium. The method includes: during the spin-drying function, increasing the rotation speed of the inner drum of the washing machine to a first preset speed and controlling the inner drum to drain water; after running continuously at the first preset speed for a first preset time, determining whether the washing machine has completed draining; after determining that the washing machine has completed draining, controlling the rotation speed of the inner drum to decrease to a second preset speed and adding water to the inner drum; after the water level in the inner drum reaches a preset water level, increasing the rotation speed of the inner drum to a third preset speed and acquiring the water level fluctuation amplitude of the preset water level; if the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold, then performing a high-speed spin-drying operation. By running continuously at the first preset speed for a first preset time, the load on the inner drum is redistributed under the action of centrifugal force, avoiding vibration caused by direct speed increase due to misjudgment of balance. Dynamically monitoring the drainage status during continuous operation effectively avoids eccentric weight aggravation caused by incomplete drainage. By reducing the spin speed, filling the water to the preset water level, and then increasing the spin speed to the third preset speed to detect water level fluctuations, the real-time stable state of the entire load distribution can be deduced. This ensures that the high-speed spin-drying stage can start in the optimal balance state, greatly reducing the risk of vibration and drum collision during the spin-drying process, and improving the reliability and service life of the washing machine. Attached Figure Description

[0067] Figure 1 This is a flowchart of the steps of a washing machine spin-drying control method provided in an embodiment of the present invention;

[0068] Figure 2 This is a flowchart of another washing machine spin-drying control method provided in an embodiment of the present invention;

[0069] Figure 3 This is a schematic diagram of the washing machine spin-drying process according to an embodiment of the present invention.

[0070] Figure 4 This is a structural block diagram of a washing machine spin-drying control device provided in an embodiment of the present invention. Detailed Implementation

[0071] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] Traditional methods can cause malfunctions such as drum collisions and displacement if the machine continues to operate without complete drainage or excessive vibration, affecting its stability and lifespan.

[0073] One of the core concepts of this invention is that by continuously running at a first preset speed for a first preset time, and dynamically monitoring the drainage status during continuous operation, the eccentricity caused by incomplete drainage is effectively avoided. A series of steps, including reducing the speed, filling water to a preset level, and then increasing the speed to a third preset speed for water level fluctuation detection, ensure that the high-speed dehydration stage starts in an optimal balanced state, greatly reducing the risk of vibration and barrel collision during the dehydration process.

[0074] Reference Figure 1 The diagram illustrates a flowchart of a washing machine spin-drying control method according to an embodiment of the present invention. The method specifically includes the following steps:

[0075] Step 101: During the spin-drying process, the rotation speed of the inner drum of the washing machine is increased to the first preset speed, and the inner drum is controlled to drain water.

[0076] In current washing machine technology, especially during the spin-drying process of drum washing machines, there is a problem of undetectable low-speed eccentricity errors caused by diagonal offset. This error manifests as a state of equilibrium at low speeds, making it difficult to determine whether the clothes are truly evenly distributed, thus affecting vibration control during subsequent high-speed spin-drying. Continuing to operate under excessive vibration can easily lead to malfunctions such as drum collisions and displacement, affecting the stability and lifespan of the washing machine.

[0077] The embodiments of the present invention solve the technical problems such as the inability to identify diagonal eccentricity at low speed during the spin-drying process of a washing machine, inaccurate drainage control, untimely vibration monitoring, and unreasonable water level control that easily lead to drum collision and displacement.

[0078] A washing machine is a modern household appliance that integrates mechanics, electronics, and automation control. Its main function is to efficiently clean clothes, bedding, and other fabrics through programmed washing, rinsing, and spin-drying processes. The core structure typically includes an outer casing that supports and protects the internal components; the washing / spin-drying tub usually has a dual structure consisting of an outer tub (water tank) and an inner tub (spin-drying tub, with holes).

[0079] The inner drum, also known as the spin-dry drum or washing drum, is a perforated metal drum in a washing machine that directly holds the clothes and rotates with them. It is the key component for generating washing mechanical force and achieving spin-drying. Uneven distribution of clothes (such as one side being heavier) will cause the center of mass of the inner drum to deviate from the center of rotation. During spin-drying, the water in the clothes is thrown out through the small holes in the inner drum wall by centrifugal force and then discharged into the outer drum.

[0080] The first preset speed refers to a key target speed value at which the inner drum is raised and maintained during the initial stage of the washing machine's spin-drying function to determine whether the eccentric state has been exposed and drainage has been completed. Its core characteristic is that it is lower than the washing machine's resonance speed, but significantly higher than the speed used for low-speed weighing or shaking.

[0081] Increasing the rotation speed to a first preset speed (e.g., 800 rpm) generates a sufficiently large centrifugal force to fully pull the inner drum under any unbalanced load, amplifying its displacement from the center of rotation. This allows the load cell, water level / pressure sensor, or accelerometer to clearly and reliably detect the imbalance. Continuous operation at the first preset speed ensures that most of the water that can be expelled by centrifugal force at that speed is continuously and effectively drained from the clothing.

[0082] In this embodiment of the invention, under the premise of ensuring absolute safety, two key technical objectives, namely eccentric pre-exposure and dynamic drainage, are achieved simultaneously through a continuous, stable and sufficiently high centrifugal force field. The first preset rotational speed is strictly lower than the overall machine resonance speed.

[0083] Clothing may exhibit false balance at low speeds, especially with diagonal eccentricity that is difficult to detect. By increasing the speed to a first preset speed and maintaining it (e.g., 800 rpm for at least 3 minutes), sufficient centrifugal force forces the true imbalance of the load to fully act on the inner drum, amplifying its eccentric displacement, which can then be reliably captured by water level / pressure or vibration sensors. This solves the fundamental flaw of traditional methods in misjudging balance at low speeds. Traditional timed drainage cannot adapt to the drainage characteristics of different loads. In this embodiment, the steps deeply couple drainage with periodic weighing at the first preset speed. Weighing is performed continuously before and after speed-up and during stable operation. Only when the continuous weighing values ​​tend to be equal is it determined that the water that can be drained at the current centrifugal force level has been completely drained. This dynamic criterion based on the tendency of mass change to zero fundamentally avoids the subsequent vibration risk caused by incomplete drainage (residual water aggravates eccentricity) or premature termination of drainage, laying a precise initial condition for the stability of the entire dehydration process.

[0084] Step 102: After running continuously at the first preset speed for a first preset time, determine whether the washing machine has completed draining;

[0085] In this embodiment of the invention, a first preset time period is used as an observation window to evaluate and confirm the results of the centrifugal drainage process. After a drainage cycle based on a high centrifugal force field, convergence judgment is required based on comprehensive sensor data to determine whether the conditions for proceeding to the next stage are met.

[0086] The core criterion for determining whether drainage is complete is based on periodic weighing data analysis. Throughout the entire process of maintaining a first preset rotational speed, the total mass data of the load is acquired at fixed or adaptive intervals. Drainage is considered complete when the system detects that the difference between consecutively acquired weighing values ​​approaches zero or is less than a preset minimum threshold. Under the centrifugal force generated by the current rotational speed, the water that can be effectively removed from the clothing has reached a dynamic equilibrium, and continuing to maintain this rotational speed will not remove any more water. This dynamic determination method based on the approaching zero rate of mass change completely abandons the traditional, crude control method that relies on fixed durations, achieving precise identification of the drainage endpoint.

[0087] Step 103: After confirming that the washing machine has finished draining, control the rotation speed of the inner drum to decrease to the second preset speed, and inject water into the inner drum;

[0088] The second preset speed is a transition speed, and its set value is significantly lower than the first preset speed, usually in the range of 0-200 rpm.

[0089] After reducing to the second preset spin speed, the system controls the water intake, precisely maintaining the water level at a specific position above the bottom of the drum and below the heating element. The second preset spin speed generates almost no impactful centrifugal force, preventing water from being thrown out. Injecting water into the inner drum creates a "buffer layer" or "isolation layer," effectively blocking condensation caused by the temperature difference between the inner and outer drums, as well as residual water that may be splashed up due to shaking, preventing it from falling back onto the clothes in the inner drum. This fundamentally eliminates the risk of clothes being re-wetted during the spin-drying stage, directly improving the final dryness and washing quality.

[0090] In this embodiment of the invention, the rotation speed is significantly reduced from a relatively high first preset speed to an extremely low second preset speed. This speed reduction actively removes the strong centrifugal force field previously used for drainage and eccentricity detection, allowing the load inside the washing machine to return from a relatively high-energy state to a near-static, minimally disturbed baseline state.

[0091] Water is poured into the stationary or slowly rotating inner drum until a preset, precisely controlled water level is reached (above the bottom of the drum, below the heating element). This water acts as an insulating layer, preventing condensation and splashing water from re-wetting the clothes, directly improving the spin-drying quality. Together with the inner drum, it forms an inherently highly sensitive "inertial liquid mass." Any minute movement of the inner drum caused by potential eccentricity or imbalance will be amplified into significant water surface fluctuations due to the inertia of the water. This converts the mechanical vibration signal into a liquid level signal that is more easily captured by the water level sensor, enabling the monitoring of system stability.

[0092] Step 104: After the water level in the inner cylinder reaches the preset water level, the rotation speed of the inner cylinder is increased to the third preset rotation speed, and the water level fluctuation amplitude of the preset water level is obtained.

[0093] The third preset speed is the final calibration speed for the entire spin-drying preparation process. It is usually set to a value lower than or equal to the first preset speed, such as 600 rpm. Increasing the speed from the very low second preset speed to the moderately high third preset speed is equivalent to applying a significant but not out-of-control centrifugal force. This force field is sufficient to excite and amplify the slight eccentricity of the load residue, as well as any soft defects that may exist in the washing machine's suspension system (such as damping aging, uneven installation).

[0094] The amplitude of water level fluctuation is a core criterion for system stability. It is not simply a change in water level height, but rather refers to the peak value (difference between the maximum and minimum value) of the periodic or non-periodic oscillations in the water surface at the preset water level in the inner cylinder, caused by the vibration of the inner cylinder itself or eccentric motion. When the inner cylinder experiences minor vibrations due to residual eccentricity or suspension instability, this portion of water, with its inertia and fluidity, acts like a highly sensitive inertial liquid sensor, amplifying and converting the subtle mechanical vibrations of the inner cylinder into significant water surface fluctuations that are easily observed by the naked eye or sensors.

[0095] In this embodiment of the invention, the core objective is to actively stimulate and quantify the dynamic imbalance state of the system under a safe and controllable rotational speed, thereby making a final judgment on whether it can safely enter the final high-speed dehydration stage. The prerequisite is that the inner cylinder has been filled with and stabilized at a preset water level. The rotational speed is increased from a second preset speed (stationary or extremely low) to a third preset speed. The third preset speed is a moderate speed, significantly higher than normal swaying but lower than the dangerous resonance zone. During stable operation at the third preset speed, the fluctuation range of the preset water level is continuously monitored in real time.

[0096] Step 105: If the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold, then perform high-speed dehydration operation.

[0097] In this embodiment of the invention, the real-time acquired and quantified water level fluctuation amplitude is compared with a preset fluctuation amplitude threshold. This threshold is intelligently adjusted based on the current load weight and a third preset rotational speed, ensuring that the adjudication standard is both strict and reasonable, and can adapt to different working conditions.

[0098] If the threshold is not exceeded, it proves that the inner drum, load, suspension, and water (acting as a sensor) maintain stable operation at the third preset spin speed. Based on this, it can be inferred that the system can still maintain stable operation at a higher target spin speed. Therefore, the final high-speed spin-drying operation is triggered, increasing the inner drum speed to the preset maximum spin-drying speed to complete the efficient spin-drying task. If the threshold is exceeded, it indicates that the system has shown a tendency to become unstable during the test, and its operation has exceeded the safety boundary. The request to enter high-speed spin-drying will be immediately rejected, and instead, protection mechanisms (such as shutdown, alarm, prompting the user to redistribute clothes or adjust the washing machine position) will be triggered, thereby completely intercepting the risk of collisions, displacement, and other malfunctions before they occur.

[0099] Reference Figure 2 The diagram illustrates a flowchart of another washing machine spin-drying control method provided by an embodiment of the present invention. The method specifically includes the following steps:

[0100] Step 201: During the spin-drying process, the rotation speed of the inner drum of the washing machine is increased to the first preset speed, and the inner drum is controlled to drain water.

[0101] Before initiating the eccentricity detection, the washing machine first increases the speed of the inner drum to a preset speed (e.g., 800 rpm) below the resonance speed, and then runs it continuously at this speed for a period of time. During this process, the system continuously monitors changes in the water level frequency (water level height) until the water level frequency stabilizes and no longer changes, indicating that the eccentricity has manifested. Stabilization means that there is essentially no change, or the fluctuation value is stable without significant fluctuations.

[0102] In addition, a pressure sensor replaces the traditional water level frequency detection method to obtain real-time data on water pressure changes in the inner cylinder and determine whether the water level is stable. Compared with traditional water level sensors, the pressure sensor has a faster response and higher accuracy, improving the reliability and real-time performance of the detection.

[0103] In this embodiment of the invention, under the premise of ensuring absolute safety, two key technical objectives, namely eccentric pre-exposure and dynamic drainage, are achieved simultaneously through a continuous, stable and sufficiently high centrifugal force field. The first preset rotational speed is strictly lower than the overall machine resonance speed.

[0104] Clothing may exhibit false balance at low speeds, especially with diagonal eccentricity that is difficult to detect. By increasing the speed to a first preset speed and maintaining it (e.g., 800 rpm for at least 3 minutes), sufficient centrifugal force forces the true imbalance of the load to fully act on the inner drum, amplifying its eccentric displacement, which can then be reliably captured by water level / pressure or vibration sensors. This solves the fundamental flaw of traditional methods in misjudging balance at low speeds. Traditional timed drainage cannot adapt to the drainage characteristics of different loads. In this embodiment, the steps deeply couple drainage with periodic weighing at the first preset speed. Weighing is performed continuously before and after speed-up and during stable operation. Only when the continuous weighing values ​​tend to be equal is it determined that the water that can be drained at the current centrifugal force level has been completely drained. This dynamic criterion based on the tendency of mass change to zero fundamentally avoids the subsequent vibration risk caused by incomplete drainage (residual water aggravates eccentricity) or premature termination of drainage, laying a precise initial condition for the stability of the entire dehydration process.

[0105] In some embodiments, step 201 may include the following sub-steps:

[0106] Sub-step S11: Obtain the current load weight inside the washing machine;

[0107] Sub-step S12: Determine the lifting acceleration of the inner cylinder based on the current load weight;

[0108] Sub-step S13: Based on the acceleration, increase the rotational speed of the inner cylinder to a first preset rotational speed.

[0109] During the acceleration phase, the acceleration curve is dynamically adjusted based on the load weight feedback from the weighing sensor. For example, when a light load is detected, a rapid acceleration strategy is adopted to improve efficiency; when the load is heavy, a gradual acceleration strategy is adopted to avoid mechanical shock caused by sudden acceleration, thereby improving operational stability. For instance, based on load classification, loads below 3kg are considered less frequent, 4-5kg is the standard, and loads above 5kg are considered frequent. When the load is light, rapid acceleration has little impact; when the load is heavy, a smooth acceleration is used, and the impact on the overall machine is minimal until the resonance point is reached.

[0110] In this embodiment of the invention, a load-based dynamic speed-up strategy is constructed by introducing load weight sensing and adaptive control. The current load weight inside the washing machine is obtained, and the accurate mass of the load is acquired at the initial stage of the spin-drying program using a weighing sensor. The load is transformed into a quantifiable key parameter, providing a basis for subsequent personalized control.

[0111] Based on the current load weight, determine the acceleration of the inner drum during speed increase. According to the current load weight, through a preset rule or mapping relationship, calculate or select an optimal acceleration for speed increase. For light loads (such as M ≤ 3 kg), a larger acceleration for speed increase is adopted. Because light loads have small inertia, the risk of impact vibration caused by rapid speed increase is low, which can shorten the detection cycle and improve the overall dehydration efficiency. For heavy loads (such as M > 5 kg), a smaller acceleration for speed increase is adopted. Because heavy loads have large inertia, sudden acceleration is likely to generate a huge inertial torque, causing impact on the motor, belt, and suspension system, and may prematurely trigger uncontrollable vibrations. Smooth acceleration can ensure a stable speed increase process and protect the mechanical structure. For standard loads (such as 3 kg < M ≤ 5 kg), a moderate acceleration for speed increase is adopted to achieve a balance between efficiency and protection. Change the unified speed increase curve into a dynamic curve matching the load characteristics.

[0112] According to the acceleration for speed increase, raise the rotational speed of the inner drum to the first preset rotational speed. According to the determined acceleration, control the motor to smoothly raise the rotational speed of the inner drum to the target value, the first preset rotational speed. Regardless of the load weight, the rotational speed of the inner drum of the washing machine can be safely and efficiently raised to the first preset rotational speed in the most appropriate way.

[0113] Intelligent feedback during speed increase solves the potential problems in traditional methods caused by ignoring the load inertia differences: fast acceleration for light loads, reducing waiting time; stable acceleration for heavy loads, reducing noise and vibration. Avoid stress impacts on mechanical components (especially the drive system and suspension), extending the service life. Avoid additional disturbances introduced by the speed increase process itself from interfering with the accurate exposure of the eccentric state, making the subsequent detection results more reliable.

[0114] In some embodiments, step 201 may further include the following sub-steps:

[0115] Sub-step S21, during the operation at the first preset rotational speed, monitor the change in the water level or water pressure of the inner drum;

[0116] Sub-step S22, if the fluctuation value of the water level or water pressure is within the preset stable fluctuation range, control the inner drum to drain water;

[0117] Sub-step S23, if the fluctuation value of the water level or water pressure is not within the preset stable fluctuation range, control the inner drum to continue operating at the first preset rotational speed until the fluctuation value of the water level or water pressure is within the preset stable fluctuation range.

[0118] In this embodiment of the invention, during operation at a first preset rotational speed, the change of a first physical quantity related to the water level in the inner cylinder is continuously monitored; the first physical quantity is the water level height measured by a level sensor, or the water pressure in the inner cylinder measured by a pressure sensor. Indirect characterization signals reflecting the load eccentricity are acquired in real time. When the inner cylinder shakes due to eccentricity, it causes drastic fluctuations in the water level or periodic changes in water pressure.

[0119] The system determines whether the fluctuations in water level or pressure remain within a preset stable fluctuation range during continuous monitoring. If so, it determines that the load eccentricity has stabilized and triggers the inner drum to perform a drainage operation. Only when the fluctuations in water level / pressure become smooth and regular (fluctuation values ​​within the preset range) does it mean that the clothes in the inner drum have reached a dynamic equilibrium distribution under the centrifugal force of the first preset rotation speed, and the eccentricity has been fully exposed and no longer changes drastically. Starting drainage at this point ensures that the amount of water discharged is stable, and the subsequent weighing to determine the completion of drainage is more reliable.

[0120] If the fluctuation value of water level or water pressure is not within the preset stable fluctuation range, the inner cylinder will continue to run at the first preset speed until the stability condition is met, or after reaching a maximum continuous running time, an abnormal handling process will be executed. If the fluctuation still cannot be stabilized after a long period of operation, it indicates that the load may be in a special state that cannot be automatically balanced (such as a single heavy object pressed against the cylinder wall).

[0121] At this point, the inner cylinder continues to operate at the first preset rotational speed until the fluctuation value of the water level or water pressure is within the preset stable fluctuation range. Based on the precise judgment of whether the physical signals (water level / water pressure fluctuations) have reached the stable standard, state-based feedback control is achieved, rather than simple time control. This ensures that only loads in a qualified state can proceed to the next step (drainage and drainage completion judgment). It prevents blind drainage when the load is still violently shaking or the eccentric state is unstable, which would cause the drainage process itself to be interfered with by mechanical vibration, resulting in uneven efficiency. Subsequent weighing readings would fluctuate significantly due to vibration, making it impossible to accurately determine whether drainage is complete.

[0122] Step 202: After running continuously at the first preset speed for a first preset time, determine whether the washing machine has completed draining;

[0123] In this embodiment of the invention, a first preset time period is used as an observation window to evaluate and confirm the results of the centrifugal drainage process. After a drainage cycle based on a high centrifugal force field, convergence judgment is required based on comprehensive sensor data to determine whether the conditions for proceeding to the next stage are met.

[0124] The core criterion for determining whether drainage is complete is based on periodic weighing data analysis. Throughout the entire process of maintaining a first preset rotational speed, the total mass data of the load is acquired at fixed or adaptive intervals. Drainage is considered complete when the system detects that the difference between consecutively acquired weighing values ​​approaches zero or is less than a preset minimum threshold. Under the centrifugal force generated by the current rotational speed, the water that can be effectively removed from the clothing has reached a dynamic equilibrium, and continuing to maintain this rotational speed will not remove any more water. This dynamic determination method based on the approaching zero rate of mass change completely abandons the traditional, crude control method that relies on fixed durations, achieving precise identification of the drainage endpoint.

[0125] In some embodiments, step 202 may include the following sub-steps:

[0126] Sub-step S31: Periodically weigh the washing machine to obtain multiple weighing values;

[0127] Sub-step S32: Based on the multiple weighing values, determine whether the washing machine has completed draining.

[0128] Once the water level frequency stabilizes, the washing machine slows down to the second preset spin speed and performs a weighing test at that speed to obtain the current load. The spin-drying time is controlled by adjusting the water level frequency stabilization time under different load conditions. Based on the weighing results, the system automatically adjusts the drainage time to ensure that the water level gradually decreases but remains within a reasonable range during the drain pump's operation, facilitating subsequent testing.

[0129] The dehydration time is controlled by the water level frequency stabilization time. A long stabilization time indicates a heavy load inside the machine. During the drainage process, water will drip from the load onto the inner and outer cylinders, resulting in a long drainage time. In addition, a long water level frequency stabilization time and a heavy load will affect the dehydration time.

[0130] In this embodiment of the invention, during and after operation at a first preset speed, the weight values ​​of the washing machine are acquired at fixed or variable periods to obtain a time series of weight values ​​b1, b2, b3, ..., bn. These weight values ​​are an instantaneous reflection of the total mass of the inner drum, the load, and the water contained therein. Periodic weighing of the washing machine can be performed at equal time intervals, or the sampling frequency can be adaptively adjusted according to the rate of change of the data. Each decrease in weight value directly reflects the mass of water discharged from the machine due to centrifugal force at that moment. Therefore, this sequence essentially describes the "rate of change of drainage mass over time (or with the sampling period)".

[0131] Analyze the weighing value sequence to determine if it meets the convergence condition indicating that drainage is nearing its end; if it does, the washing machine is considered to have completed drainage. Calculate the absolute difference Δb = |b| between two consecutive weighing values. n -bn-1 The process involves comparing Δb with a preset weight change threshold ε. If Δb ≤ ε, it is considered that the load mass has essentially stopped changing under the current measurement accuracy and system conditions. At the current rotational speed, no more water can be effectively discharged per unit time, and the drainage process has reached dynamic equilibrium; at this point, drainage is considered complete.

[0132] The threshold ε can be a fixed small value, or it can be a variable that is dynamically adjusted according to the load weight M (for example, the heavier the load, the larger the absolute amount of residual moisture that can be allowed, and the threshold ε can be finely adjusted accordingly), making the judgment more adaptable and reasonable.

[0133] This fundamentally eliminates all subsequent problems caused by either too short a fixed drainage time (leading to incomplete drainage and residual water exacerbating eccentricity) or too long a time (leading to low efficiency). Drainage completion is a convergent state based on the physical fact (constant mass), ensuring that the load's moisture content has reached the lowest level achievable under the current centrifugal force when entering the next stage, thus laying the optimal foundation for stability.

[0134] In some embodiments, step S32 may include the following sub-steps:

[0135] Sub-step S321: When the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold, it is determined that the washing machine has completed draining.

[0136] In this embodiment of the invention, when the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold, it is determined that the washing machine has completed draining. If |b n -b n-1 If |≤ε, then drainage is considered complete. n The latest weighing value, b n-1 The previous weighing value is given, and ε is the preset first weight change threshold. The difference approaches zero (less than the threshold ε), which means that the rate of change of the weighing sequence {b1, b2, ..., bn} has converged to a negligible level, indicating that the total mass (load and residual water) in the washing machine remains almost unchanged between the two sampling intervals.

[0137] The determination is based on the assumption that, under the centrifugal force generated by the current rotation speed, the water that can be removed from the clothing by this force field has reached a dynamic equilibrium. Continuing to maintain the current rotation speed will not effectively remove more water. The judgment is based on two consecutive data points, rather than a single data jump, which effectively filters out false triggers caused by momentary shaking of the inner drum, occasional sensor noise, etc., resulting in a very stable and reliable decision. By continuously monitoring the weight and comparing the result with a set value (threshold ε), a crucial state transition decision (drainage complete) is made based on the comparison result, making the determination of whether drainage is complete more accurate.

[0138] Step 203: After confirming that the washing machine has finished draining, control the rotation speed of the inner drum to decrease to the second preset speed, and inject water into the inner drum;

[0139] After drainage is complete, the washing machine stops draining and refills with water to a level higher than the bottom of the tub but lower than the heating element. This water level setting ensures that water inside the tub will not enter the inner drum due to agitation during subsequent speed-up processes, while also providing sufficient water for vibration monitoring. The water filling process is controlled by both a water level sensor and a pressure sensor to ensure that the water level is accurately controlled within the specified range.

[0140] In this embodiment of the invention, the rotation speed is significantly reduced from a relatively high first preset speed to an extremely low second preset speed. This speed reduction actively removes the strong centrifugal force field previously used for drainage and eccentricity detection, allowing the load inside the washing machine to return from a relatively high-energy state to a near-static, minimally disturbed baseline state.

[0141] Water is poured into the stationary or slowly rotating inner drum until a preset, precisely controlled water level is reached (above the bottom of the drum, below the heating element). This water acts as an insulating layer, preventing condensation and splashing water from re-wetting the clothes, directly improving the spin-drying quality. Together with the inner drum, it forms an inherently highly sensitive "inertial liquid mass." Any minute movement of the inner drum caused by potential eccentricity or imbalance will be amplified into significant water surface fluctuations due to the inertia of the water. This converts the mechanical vibration signal into a liquid level signal that is more easily captured by the water level sensor, enabling the monitoring of system stability.

[0142] Step 204: After the water level in the inner cylinder reaches the preset water level, the rotation speed of the inner cylinder is increased to the third preset rotation speed, and the water level fluctuation amplitude of the preset water level is obtained.

[0143] The washing machine then accelerates to the third preset speed (e.g., 600 rpm) and runs at that speed for a period of time. During this process, the system monitors water level fluctuations in real time. If the water level fluctuation exceeds a set threshold, it indicates that the suspension system is unstable, and the washing machine will immediately stop running and prompt the user to level the washing machine again to prevent it from shifting due to drum collision. The water level fluctuation exceeding the set threshold is related to the load weight and / or the current speed.

[0144] To improve the accuracy of the suspension system status assessment, multi-sensor fusion technology is employed, including water level sensors, acceleration sensors, and weighing sensors, to comprehensively analyze the washing machine's operating status. For example, the vibration acceleration of the inner drum is detected by the acceleration sensor, and combined with water level fluctuation data, it is determined whether the suspension system is in an abnormal state. If the multi-sensor data indicates eccentricity or suspension instability, a leveling mechanism is triggered, prompting the user to adjust the washing machine's position to ensure stable operation. When any acceleration sensor requirement is not met, a reassessment is performed to avoid misjudgment. If one other sensor shows an error while the other is normal, the next step continues. If both other sensors show abnormalities, an abnormality is determined, primarily based on vibration acceleration.

[0145] In this embodiment of the invention, the core objective is to actively stimulate and quantify the dynamic imbalance state of the system under a safe and controllable rotational speed, thereby making a final judgment on whether it can safely enter the final high-speed dehydration stage. The prerequisite is that the inner cylinder has been filled with and stabilized at a preset water level. The rotational speed is increased from a second preset speed (stationary or extremely low) to a third preset speed. The third preset speed is a moderate speed, significantly higher than normal swaying but lower than the dangerous resonance zone. During stable operation at the third preset speed, the fluctuation range of the preset water level is continuously monitored in real time.

[0146] Step 205: If the water level fluctuation does not exceed the fluctuation threshold, then perform high-speed dehydration.

[0147] In some embodiments, the fluctuation amplitude threshold is determined based on the current load weight inside the washing machine and / or the third preset rotation speed.

[0148] If the water level fluctuation is within the allowable range, the eccentric state is deemed acceptable, and the washing machine enters the high-speed spin-drying stage; otherwise, the system prompts the user to check and adjust the washing machine's position to ensure stable operation. When the system prompts the user to reposition the washing machine, it primarily refers to repositioning the load (i.e., the clothes) and adjusting the washing machine's position.

[0149] Because the inherent dynamic characteristics and excitation response of a washing machine system differ significantly under different load weights and rotation speeds, a fixed threshold would inevitably lead to overly stringent conditions causing frequent false alarms under light loads, or overly lenient conditions causing missed alarms under heavy loads. This invention addresses this by dynamically linking the threshold to the current load weight and a third preset rotation speed, allowing the judgment standard to adapt to real-time operating conditions. Specifically, the system can preset an empirical model or calculation formula based on the load-rotation mapping to calculate the reasonable upper limit of water level fluctuations allowed under the current state in real time. For example, the heavier the load and the higher the rotation speed, the greater the system inertia, and the higher the allowable physical oscillation amplitude (corresponding to water level fluctuation) threshold may be adjusted accordingly, and vice versa. This ensures that under any load and test rotation speed, the system's "stability / instability" judgment is based on a benchmark matching the operating condition, thereby improving detection sensitivity while greatly reducing the false alarm rate, making the final spin-drying permission decision both safe and accurate.

[0150] In this embodiment of the invention, the real-time acquired and quantified water level fluctuation amplitude is compared with a preset fluctuation amplitude threshold. This threshold is intelligently adjusted based on the current load weight and a third preset rotational speed, ensuring that the adjudication standard is both strict and reasonable, and can adapt to different working conditions.

[0151] If the threshold is not exceeded, it proves that the inner drum, load, suspension, and water (acting as a sensor) maintain stable operation at the third preset spin speed. Based on this, it can be inferred that the system can still maintain stable operation at a higher target spin speed. Therefore, the final high-speed spin-drying operation is triggered, increasing the inner drum speed to the preset maximum spin-drying speed to complete the efficient spin-drying task. If the threshold is exceeded, it indicates that the system has shown a tendency to become unstable during the test, and its operation has exceeded the safety boundary. The request to enter high-speed spin-drying will be immediately rejected, and instead, protection mechanisms (such as shutdown, alarm, prompting the user to redistribute clothes or adjust the washing machine position) will be triggered, thereby completely intercepting the risk of collisions, displacement, and other malfunctions before they occur.

[0152] In some embodiments, the following steps also need to be performed before performing step 205:

[0153] Step S41: Weigh the load inside the washing machine to obtain the load weight before spin-drying;

[0154] Step S42: Determine the difference between the pre-dehydration load weight and the last of the multiple weighing values ​​obtained by periodically weighing the washing machine;

[0155] Step S43: Determine whether the inner cylinder performs the high-speed dehydration operation based on the difference.

[0156] Before entering high-speed dehydration, the system will perform another rapid weighing to confirm that the load distribution has not changed significantly. If there is a significant change (such as clothing movement), the eccentricity monitoring process will be repeated to ensure the safety of the dehydration process. If the rapid weighing detects a change in load, the eccentricity monitoring process will be repeated. If the conditions for high-speed dehydration are met, dehydration will continue. If not, eccentricity monitoring will continue until the dehydration requirements are met. If the conditions are not met for a certain period of time, the dehydration process will stop.

[0157] In this embodiment of the invention, a load status verification is performed before the high-speed spin-drying operation to capture any undetected load status changes that may occur during the preceding dynamic test. The load inside the washing machine is weighed to obtain the load weight before spin-drying. At the critical point just before entering the high-speed spin-drying stage, the latest weight of the current load is obtained. At this time, the inner drum is usually at a low speed (e.g., just dropping from the third preset speed or at rest) to ensure accurate weighing.

[0158] Determine the difference between the load weight before dehydration and the last weighing value obtained from periodic weighing. Quantify the mass change of the load before performing the high-speed dehydration operation. Determine the load at the time of drainage completion at the first preset speed and the current weight after subsequent stages such as "low-speed water injection, medium-speed (third preset speed) test". If no abnormalities occur, the two should be essentially consistent.

[0159] The system determines whether the inner drum should perform a high-speed spin-drying operation based on the difference in weight. If ΔW ≤ δ (where δ is a preset minimum weight deviation threshold), the load is considered stable and consistent, with no significant changes affecting balance (e.g., no large-scale movement of clothing, no abnormal increase or decrease in moisture). The system allows high-speed spin-drying. If ΔW > δ, the load has been abnormally altered, possibly due to redistribution of clothing, changing the center of mass, unmeasured moisture entering (e.g., condensation dripping), or accidental discharge.

[0160] Connect the system before spin-drying and after draining to verify the stability of the washing machine system. If the weight difference is too large, it indicates that the system's stability has been compromised and the process must be stopped. By comparing weights, the system's robustness and absolute safety in the face of unpredictable disturbances are greatly improved.

[0161] In some embodiments, step S43 may include the following sub-steps:

[0162] In sub-step S431, if the difference does not exceed the second weight change threshold, the high-speed dehydration operation is performed; if the difference exceeds the second weight change threshold, the process returns to the operation of increasing the rotation speed of the inner cylinder to the first preset rotation speed.

[0163] In this embodiment of the invention, if the difference between the weight before dehydration and the baseline weight after drainage is within the allowable range of a second weight change threshold (usually a preset minimum value), then high-speed dehydration is approved. This proves that the load state remains stable and consistent throughout the entire detection process. If the difference exceeds this threshold, a safety rollback mechanism is triggered. The process is not a local adjustment, but rather a direct return to the starting point of the process, i.e., the operation of "increasing the inner drum speed to the first preset speed". This design means that the system determines that the load state has undergone an unacceptable, fundamental change (such as significant displacement of clothing or accidental soaking), and all previous detection and balancing results based on the old state are invalid. Therefore, the system chooses to abandon all current intermediate states and perform a complete reset and re-detection, thereby eliminating any risks that may be caused by sudden changes in state during high-speed dehydration in the most conservative and reliable way, ensuring the absoluteness of the safety strategy.

[0164] Step 206: When obtaining the water level fluctuation amplitude of the preset water level at the third preset rotation speed, obtain the vibration acceleration of the inner cylinder;

[0165] At this stage, the system also combines weighing data with feedback from the acceleration sensor to comprehensively determine whether the load distribution is uniform. If a large deviation in the load distribution is detected, the user is prompted to adjust the distribution of clothing or reduce the load to optimize the subsequent dehydration effect.

[0166] In this embodiment of the invention, when acquiring the water level fluctuation amplitude at a preset water level under a third preset rotation speed, acquiring the vibration acceleration of the inner cylinder is a process of parallel data acquisition and information complementarity enhancement in a multi-sensor fusion decision-making strategy. The core purpose of this step is to simultaneously acquire signals characterizing system stability from two different physical dimensions, providing a richer and more reliable chain of evidence for the final comprehensive safety decision.

[0167] Water level fluctuation amplitude is an indirect, highly sensitive indicator reflecting the inner drum's swaying at the macroscopic liquid motion level, while vibration acceleration is a physical quantity that directly measures the vibration of the inner drum itself from a structural mechanics perspective. Simultaneously acquiring these two key parameters allows for more accurate stability assessment of the washing machine when both indicate stability or abnormality. When the two signals contradict each other (e.g., normal water level fluctuation but slightly excessive vibration), vibration acceleration is prioritized as the primary criterion, with water level fluctuation used as a secondary criterion for in-depth analysis. This effectively avoids misjudgments caused by false alarms, malfunctions, or specific interference from a single sensor, significantly improving the robustness, fault tolerance, and decision accuracy of the entire stability assessment system. This marks an upgrade from simple judgment relying on a single data source to intelligent diagnosis based on multi-source information fusion.

[0168] Step 207: When the water level fluctuation exceeds the fluctuation amplitude threshold and / or the vibration acceleration exceeds the acceleration threshold, a leveling intervention operation is performed; the leveling intervention operation includes controlling the washing machine to stop running and issuing a prompt message to guide the user to redistribute the load or adjust the position of the washing machine.

[0169] In this embodiment of the invention, when any one of the real-time monitored indicators, namely the water level fluctuation amplitude and / or vibration acceleration, exceeds its respective dynamic threshold, the system immediately determines that the current dehydration state is at high risk. At this time, the system does not passively accept or attempt internal adjustments, but actively executes a "smoothing intervention." This operation comprises two levels: first, immediately stopping the washing machine to physically terminate the continuation and deterioration of the risky state; second, issuing clear prompts to the user through the human-machine interface, transforming the abstract sensor data anomaly into specific, operable user guidance ("redistribute the load" or "adjust the washing machine position"), thereby invoking user intelligence to complete the physical realignment work that the machine itself cannot perform. This achieves a closed loop from automatic machine diagnosis to human-machine collaborative troubleshooting, ensuring that even when the algorithm cannot resolve the risk internally, there is still a reliable external intervention path to guarantee absolute safety.

[0170] Reference Figure 3 This diagram illustrates a washing machine spin-drying process according to an embodiment of the present invention. Figure 3 This demonstrates the complete process of the washing machine spin-drying control method according to an embodiment of the present invention: starting from raising the inner drum to the first preset speed, the system first determines whether to start drainage by monitoring whether the water level / water pressure fluctuation is stable; during the drainage stage, periodic weighing is performed, and drainage is determined to be completed when the difference between two consecutive weighing values ​​is less than or equal to the first weight change threshold; then the speed is reduced to the second preset speed and water is added to the preset water level, and then the speed is increased to the third preset speed to verify the stability of the suspension system. If the water level fluctuation amplitude and / or vibration acceleration exceed the threshold at this time, a leveling intervention operation is performed; if it does not exceed the threshold, the load weight before spin-drying is obtained and compared with the weighing value when drainage is completed. If the difference does not exceed the second weight change threshold, a high-speed spin-drying operation is finally performed; otherwise, the system returns to the initial steps to re-detect and balance.

[0171] This invention discloses a washing machine spin-drying control method, device, washing machine, and storage medium. The method includes: during the spin-drying function, increasing the rotation speed of the inner drum of the washing machine to a first preset speed and controlling the inner drum to drain water; after running continuously at the first preset speed for a first preset time, determining whether the washing machine has completed draining; after determining that the washing machine has completed draining, controlling the rotation speed of the inner drum to decrease to a second preset speed and adding water to the inner drum; after the water level in the inner drum reaches a preset water level, increasing the rotation speed of the inner drum to a third preset speed and acquiring the water level fluctuation amplitude of the preset water level; if the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold, then performing a high-speed spin-drying operation. By running continuously at the first preset speed for a first preset time, the load on the inner drum is redistributed under the action of centrifugal force, avoiding vibration caused by direct speed increase due to misjudgment of balance. Dynamically monitoring the drainage status during continuous operation effectively avoids eccentric weight aggravation caused by incomplete drainage. By reducing the spin speed, filling the water to the preset water level, and then increasing the spin speed to the third preset speed to detect water level fluctuations, the real-time stable state of the entire load distribution can be deduced. This ensures that the high-speed spin-drying stage can start in the optimal balance state, greatly reducing the risk of vibration and drum collision during the spin-drying process, and improving the reliability and service life of the washing machine.

[0172] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0173] Reference Figure 4 The diagram shows a structural block diagram of a washing machine spin-drying control device according to an embodiment of the present invention. The device specifically includes the following modules:

[0174] The inner drum speed control module 301 is used to increase the rotation speed of the inner drum of the washing machine to a first preset speed during the spin-drying process and control the inner drum to drain water.

[0175] The inner drum drainage determination module 302 is used to determine whether the washing machine has completed drainage after running continuously for a first preset time at the first preset speed.

[0176] The inner drum speed reduction control module 303 is used to control the rotation speed of the inner drum to decrease to a second preset speed and inject water into the inner drum after determining that the washing machine has finished draining.

[0177] The water level fluctuation amplitude acquisition module 304 is used to increase the rotation speed of the inner cylinder to a third preset rotation speed after the water level of the inner cylinder reaches a preset water level, and to acquire the water level fluctuation amplitude of the preset water level.

[0178] The dehydration operation execution module 305 is used to execute a high-speed dehydration operation if the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold.

[0179] In some embodiments, the inner cylinder speed control module 301 includes:

[0180] The current load weight acquisition submodule is used to acquire the current load weight inside the washing machine;

[0181] The acceleration determination submodule is used to determine the acceleration of the inner cylinder based on the current load weight;

[0182] The inner cylinder rotation speed enhancement submodule is used to increase the rotation speed of the inner cylinder to a first preset rotation speed according to the acceleration.

[0183] In some embodiments, the inner cylinder speed control module 301 includes:

[0184] The water level and pressure monitoring submodule is used to monitor the water level or water pressure changes of the inner cylinder during operation at the first preset rotation speed.

[0185] The inner cylinder drainage control submodule is used to control the inner cylinder to drain water if the fluctuation value of the water level or the water pressure is within a preset stable fluctuation range; if the fluctuation value of the water level or the water pressure is not within the preset stable fluctuation range, the inner cylinder is controlled to continue running at the first preset speed until the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range.

[0186] In some embodiments, the inner cylinder drainage determination module 302 includes:

[0187] The load weighing submodule is used to periodically weigh the washing machine and obtain multiple weighing values;

[0188] The washing machine drainage determination submodule is used to determine whether the washing machine has completed drainage based on the multiple weighing values.

[0189] In some embodiments, the washing machine drainage determination submodule includes:

[0190] The drainage completion determination unit is used to determine that the washing machine has completed drainage when the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold.

[0191] In some embodiments, the apparatus further includes:

[0192] The vibration acceleration acquisition module is used to acquire the vibration acceleration of the inner cylinder when the water level fluctuation amplitude of the preset water level is acquired at the third preset rotation speed.

[0193] An intervention operation execution module is used to perform a leveling intervention operation when the water level fluctuation exceeds the fluctuation amplitude threshold and / or the vibration acceleration exceeds the acceleration threshold; the leveling intervention operation includes controlling the washing machine to stop running and issuing a prompt message to guide the user to redistribute the load or adjust the position of the washing machine.

[0194] In some embodiments, the apparatus further includes, prior to performing the high-speed dehydration operation:

[0195] The pre-spin-dry load weighing module is used to weigh the load inside the washing machine and obtain the load weight before spin-drying.

[0196] The weighing value difference determination module is used to determine the difference between the pre-dehydration load weight and the last weighing value among multiple weighing values ​​obtained by periodically weighing the washing machine;

[0197] The dehydration execution determination module is used to determine whether the inner cylinder should perform the high-speed dehydration operation based on the difference.

[0198] In some embodiments, the dehydration execution determination module includes:

[0199] The dehydration operation judgment submodule is used to execute the high-speed dehydration operation if the difference does not exceed the second weight change threshold; and to return to the operation of increasing the rotation speed of the inner cylinder to the first preset rotation speed if the difference exceeds the second weight change threshold.

[0200] In some embodiments, the fluctuation amplitude threshold is determined based on the current load weight inside the washing machine and / or the third preset rotation speed.

[0201] As the device embodiment is basically similar to the system embodiment, it is described in a relatively simple way. For relevant details, please refer to the description of the method embodiment.

[0202] This invention also provides a washing machine, including: a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, it implements the various processes of the washing machine spin-drying control method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0203] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the washing machine spin-drying control method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0204] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0205] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present invention is not limited to performing functions in the order shown or discussed. It may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0206] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0207] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method for controlling the spin-drying process of a washing machine, characterized in that, The method includes: During the spin-drying process, the rotation speed of the inner drum of the washing machine is increased to a first preset speed, and the inner drum is controlled to drain water. After running continuously at the first preset speed for a first preset time, it is determined whether the washing machine has completed draining; After confirming that the washing machine has finished draining, the rotation speed of the inner drum is reduced to a second preset speed, and water is injected into the inner drum; After the water level in the inner cylinder reaches the preset water level, the rotation speed of the inner cylinder is increased to the third preset rotation speed, and the water level fluctuation amplitude of the preset water level is obtained. If the water level fluctuation does not exceed the fluctuation threshold, then a high-speed dehydration operation is performed; The control of the inner cylinder to drain water includes: During operation at the first preset speed, the water level or water pressure change of the inner cylinder is monitored; If the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range, the inner cylinder is controlled to drain water. If the fluctuation value of the water level or the water pressure is not within the preset stable fluctuation range, the inner cylinder is controlled to continue running at the first preset speed until the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range. The step of determining whether the washing machine has completed draining after running continuously at the first preset speed for a first preset time includes: The washing machine is periodically weighed to obtain multiple weight values; Based on the multiple weighing values, it is determined whether the washing machine has completed draining.

2. The washing machine spin-drying control method according to claim 1, characterized in that, The step of increasing the rotation speed of the washing machine's inner drum to a first preset rotation speed includes: Obtain the current load weight inside the washing machine; Based on the current load weight, determine the lifting acceleration of the inner cylinder; Based on the acceleration, the rotational speed of the inner cylinder is increased to a first preset speed.

3. The washing machine spin-drying control method according to claim 1, characterized in that, The step of determining whether the washing machine has completed draining based on the plurality of weighing values ​​includes: When the difference between two consecutive weighing values ​​is less than or equal to a preset first weight change threshold, the washing machine is determined to have completed draining.

4. The washing machine spin-drying control method according to claim 1, characterized in that, The method further includes: When the water level fluctuation amplitude of the preset water level is obtained at the third preset rotation speed, the vibration acceleration of the inner cylinder is obtained; When the water level fluctuation exceeds the fluctuation amplitude threshold, and / or the vibration acceleration exceeds the acceleration threshold, a leveling intervention operation is performed; the leveling intervention operation includes controlling the washing machine to stop running and issuing a prompt message to guide the user to redistribute the load or adjust the position of the washing machine.

5. The washing machine spin-drying control method according to claim 1, characterized in that, Before performing the high-speed dehydration operation, the following is also included: Weigh the load inside the washing machine to obtain the load weight before spin-drying; Determine the difference between the pre-dehydration load weight and the last of a plurality of weighing values ​​obtained by periodically weighing the washing machine; The difference is used to determine whether the inner cylinder performs the high-speed dehydration operation.

6. The washing machine spin-drying control method according to claim 5, characterized in that, The step of determining whether the inner cylinder performs a high-speed dehydration operation based on the difference includes: If the difference does not exceed the second weight change threshold, then the high-speed dehydration operation is performed; If the difference exceeds the second weight change threshold, the process returns to the operation of increasing the rotation speed of the inner cylinder to the first preset rotation speed.

7. The washing machine spin-drying control method according to claim 2, characterized in that, The fluctuation amplitude threshold is determined based on the current load weight inside the washing machine and / or the third preset rotation speed.

8. A washing machine spin-drying control device, characterized in that, The device includes: The inner drum speed control module is used to increase the rotation speed of the inner drum of the washing machine to a first preset speed during the spin-drying function and control the inner drum to drain water. The inner drum drainage determination module is used to determine whether the washing machine has completed drainage after running continuously for a first preset time at the first preset speed. The inner drum speed reduction control module is used to control the rotation speed of the inner drum to decrease to a second preset speed after determining that the washing machine has finished draining, and to inject water into the inner drum; The water level fluctuation amplitude acquisition module is used to increase the rotation speed of the inner cylinder to a third preset rotation speed after the water level in the inner cylinder reaches a preset water level, and to acquire the water level fluctuation amplitude of the preset water level. The dehydration operation execution module is used to execute a high-speed dehydration operation if the water level fluctuation amplitude does not exceed the fluctuation amplitude threshold. The inner cylinder speed control module includes: The water level and pressure monitoring submodule is used to monitor the water level or water pressure changes of the inner cylinder during operation at the first preset rotation speed. The inner cylinder drainage control submodule is used to control the inner cylinder to drain water if the fluctuation value of the water level or the water pressure is within a preset stable fluctuation range; if the fluctuation value of the water level or the water pressure is not within the preset stable fluctuation range, the inner cylinder is controlled to continue running at the first preset speed until the fluctuation value of the water level or the water pressure is within the preset stable fluctuation range. The inner cylinder drainage determination module includes: The load weighing submodule is used to periodically weigh the washing machine and obtain multiple weighing values; The washing machine drainage determination submodule is used to determine whether the washing machine has completed drainage based on the multiple weighing values.

9. A washing machine, characterized in that, include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the washing machine spin-drying control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the washing machine spin-drying control method as described in any one of claims 1-7.

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