Washing machine and control method and control device thereof

Abstract

This application provides a washing machine and its control method and device. The method includes: controlling the washing machine to execute a pre-drying strategy; acquiring the state parameters of the washing machine during the pre-drying process; determining whether the load is a mixed thermal response load based on the state parameters; if so, controlling the washing machine to enter the main drying stage according to a preset temperature rise rate. The method provided in this application, if the load is a mixed thermal response load, actively uses a preset temperature rise rate lower than the conventional temperature rise rate to control the washing machine to enter the main drying stage. By using a smaller temperature rise rate, it effectively reduces the risk of thermal damage to light and thin loads while meeting the dehumidification needs of heavy loads, balances the thermal conflict between different thermal response loads, and ensures the uniformity of drying.

Description

Technical Field

[0001] This application belongs to the technical field of clothing handling equipment, and particularly relates to a washing machine and its control method and control device. Background Technology

[0002] Clothing handling equipment, especially dryers and washer-dryer combos, often handles mixed loads of clothing of varying thicknesses, moisture absorption and release characteristics, and heat resistance during actual use. Examples include mixing heavy cotton clothing with lightweight synthetic fabrics, knitted clothing with woven clothing, and thin shirts with thick towels. Under the same drum, the same hot air environment, and the same tumbling rhythm, such mixed loads will not exhibit consistent heat and desiccation responses.

[0003] Heavy clothing usually has a high moisture content, high thermal inertia, and slow desiccation speed; light clothing usually heats up quickly, removes moisture quickly, and approaches the end of drying earlier, but it is also more prone to problems such as local overheating, shrinkage, wrinkling, and deterioration in feel.

[0004] Therefore, the problem of how to balance the thermal conflict between loads with different characteristics urgently needs to be solved. Summary of the Invention

[0005] This application provides a washing machine and its control method and control device to solve the problem of uneven drying, such as residual moisture in thick clothes or over-drying of thin clothes, when existing clothing processing equipment simultaneously dries mixed loads with different characteristics.

[0006] This application provides a control method for a washing machine, the method comprising: Control the washing machine to execute the pre-drying strategy; Obtain the status parameters of the washing machine during the pre-drying process; Based on the state parameters, determine whether the load is a mixed thermal response load; If so, the washing machine will enter the main drying stage according to the preset heating slope; The preset heating slope is less than the conventional heating slope, and the conventional heating slope is the heating slope under the conventional drying mode.

[0007] Optionally, determining whether the load is a mixed thermal response load based on the state parameters includes: Based on the aforementioned state parameters, the characteristics of effective dehumidification efficiency, motor power response fluctuation, and heat and moisture recovery are determined. The thermal response difference index of the load is determined based on the effective dehumidification efficiency characteristics, the motor power response fluctuation characteristics, and the heat and moisture recovery characteristics. If the thermal response difference index is greater than the preset thermal response difference threshold within a preset time period, it is determined to be a mixed thermal response load.

[0008] Optionally, before controlling the washing machine to enter the main drying stage according to a preset temperature rise rate, the method further includes: The first uneven distribution index of the mixed thermal response load is determined based on the state parameters; If the first uneven distribution index is greater than the first preset uneven distribution threshold, then the washing machine is controlled to operate according to the preset protection strategy.

[0009] Optionally, the control of the washing machine to operate according to a preset protection strategy includes at least one of the following strategies: Control the cylinder to disperse according to the first beat; Control the heat pump components to operate at the first preset power; Control the fan to operate at the first preset wind speed.

[0010] Optionally, before controlling the washing machine to enter the main drying stage according to a preset temperature rise rate, the method further includes: The load is determined to meet the preset conflict conditions; Determining that the load meets the preset conflict conditions includes: The first thermal conflict index of the hybrid thermal response load is determined based on the state parameters; If the first heat conflict index is greater than the first preset heat conflict threshold, then the load is determined to meet the preset conflict condition.

[0011] Optionally, the method further includes: The preset heating slope is determined based on the first heat conflict index and the conventional heating slope.

[0012] Optionally, determining the first thermal conflict index of the mixed thermal response load based on the state parameters includes: Based on the aforementioned state parameters, the first heavy dehumidification demand index, the first light and thin protection risk index, and the first uneven distribution index are determined. Based on the first heavy dehumidification demand index, the first light and thin protection risk index, and the first preset coefficient group, the first heat conflict index is determined.

[0013] Optionally, controlling the washing machine to enter the main drying stage according to a preset temperature rise slope includes: The heat pump assembly is controlled to operate according to the preset heating slope, the fan is controlled to operate according to the second preset wind speed, and the cylinder is controlled to shake and disperse according to the second beat. The second beat is faster than the regular beat, which is the shaking beat in the regular drying mode.

[0014] Optionally, after controlling the washing machine to enter the main drying stage according to a preset temperature rise slope, the method further includes: Obtain the actual heating slope and the second thermal conflict index; Based on the deviation between the actual heating slope and the preset heating slope, and the second heating conflict index, the second preset wind speed, the second cycle time, and the power of the heat pump component are corrected.

[0015] Optionally, the second heat-induced conflict index is determined by the second heavy dehumidification demand index, the second light and thin protection risk index, and the second uneven distribution index; The step of correcting the second preset wind speed, the second cycle time, and the power of the heat pump assembly based on the deviation between the actual heating slope and the preset heating slope, and the second heat conflict index, includes: If the actual temperature rise slope is greater than the preset temperature rise slope, then control the heat pump component to reduce the second preset power based on the current power, and control the fan to reduce the third preset wind speed based on the second preset wind speed; If the second heavy dehumidification demand index is greater than the first preset heavy dehumidification demand threshold and the second light protection risk index is less than the preset light protection risk threshold, then the heat pump component is controlled to increase the third preset power based on the current power. If the second uneven distribution index is greater than the second preset uneven distribution threshold, then the cylinder is controlled to accelerate the preset beat based on the second beat.

[0016] Optionally, after correcting the second preset wind speed, the second cycle time, and the power of the heat pump assembly, the method further includes: If the second heat conflict index is less than the second preset heat conflict threshold and the second uneven distribution index is less than the third preset uneven distribution threshold within the third preset time period, then when the second heavy dehumidification demand index is greater than the second preset heavy dehumidification demand, the washing machine is controlled to enter the main dehumidification stage; when the second heavy dehumidification demand index is less than or equal to the second preset heavy dehumidification demand, the washing machine is controlled to enter the drying stage.

[0017] This application embodiment also provides a control device for a washing machine, the device comprising: The control module is configured to control the washing machine to execute the pre-drying strategy; The status parameter acquisition module is configured to acquire the status parameters of the washing machine during the pre-drying process. The analysis module is configured to determine whether the load is a mixed thermal response load based on the state parameters; The control module is also configured to control the washing machine to enter the main drying stage according to a preset heating slope if the preset conflict conditions are met. The preset heating slope is less than the conventional heating slope, and the conventional heating slope is the heating slope under the conventional drying mode.

[0018] This application also provides a washing machine, including a controller, which is configured to implement the washing machine control method described above when executing.

[0019] The washing machine control method provided in this application accurately determines whether the load is a mixed thermal response load by using the state parameters of the pre-drying stage. This avoids blindly adopting conservative or aggressive strategies. When it is determined to be a mixed thermal response load and the thermal conflict conditions are met, the washing machine is actively controlled to enter the main drying stage by using a preset heating slope that is lower than the conventional heating slope. By using a smaller heating rate, the washing machine can effectively reduce the risk of thermal damage to light and thin loads while meeting the dehumidification requirements of heavy loads. This avoids overheating damage to light and thin loads due to excessively fast heating or low drying efficiency due to excessively slow heating. It balances the thermal conflict between different thermal response loads and ensures the uniformity of drying. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0022] Figure 1 This is a first flowchart of a washing machine control method provided in an embodiment of this application.

[0023] Figure 2 This is a second flowchart of a washing machine control method provided in an embodiment of this application.

[0024] Figure 3 This is a third flowchart of a washing machine control method provided in an embodiment of this application.

[0025] Figure 4 The fourth flowchart is a control method for a washing machine provided in an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the control device for a washing machine provided in an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] In the description of the embodiments of this application, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, and memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc.

[0029] This application provides a washing machine and its control method and device to solve the problem of uneven drying, such as residual moisture in thick clothes or over-drying of thin clothes, when existing clothing processing equipment simultaneously dries mixed loads with different characteristics. The following description is in conjunction with the accompanying drawings.

[0030] For the washing machine control method provided in this application's embodiments, please refer to [link / reference needed]. Figure 1 and Figure 2 The method includes the following steps: S101: Control the washing machine to execute the pre-drying strategy.

[0031] A washing machine can be a drum-type laundry treatment device, including drum dryers, washer-dryer combos, and laundry treatment devices with drum drying functions. This type of washing machine typically includes: a rotating drum, a motor driving the drum, a heat pump assembly (including a compressor, condenser, evaporator, and throttling device), a fan, and a sensor array or estimation module for detecting status parameters such as temperature, humidity, motor current / torque, and power response. The heat pump assembly can also be replaced with an electric heater, a PTC heater, or other controllable heat output units.

[0032] A pre-drying strategy refers to operating the heat pump components, fan, and drum with a set of preset, relatively mild parameters, such as operating at the lowest power. The purpose of the pre-drying strategy is to quickly stimulate the thermal response characteristics of clothing of different materials without causing any load damage, so as to identify the condition parameters later.

[0033] S102: Obtain the status parameters of the washing machine during the pre-drying process.

[0034] State parameters may include one or more of the following: temperature change characteristics (such as condensing temperature, outlet air temperature, and inlet air temperature), humidity change characteristics (such as duct humidity), motor current fluctuations, torque estimate fluctuations, drum speed fluctuations, and recovery characteristics before and after the flipping action.

[0035] For example, the execution time of pre-drying can be a fixed duration, such as 3 to 8 minutes, and the status parameters of the washing machine during the pre-drying process can be obtained, that is, the status parameters of the washing machine within this fixed duration can be obtained.

[0036] S103: Determine whether the load is a mixed thermal response load based on state parameters; a mixed thermal response load includes loads with different temperature rise characteristics, moisture release characteristics, or heat risk characteristics under the same heat input conditions.

[0037] For example, a hybrid thermal response load may include a mixture of cotton jeans (slow heating, slow moisture release, high heat resistance) and polyester shirts (fast heating, fast moisture release, low heat resistance).

[0038] Furthermore, prior information about the washing machine can be obtained, including user input information, program mode settings, washing and drying transition operation information, and historical operation information. Based on the prior information, the load information can be corrected or verified to ensure the accuracy of the judgment result.

[0039] S104: If so, the washing machine will be controlled to enter the main drying stage (i.e., the main drying section) according to the preset temperature rise slope; wherein, the preset temperature rise slope is less than the normal temperature rise slope, and the normal temperature rise slope is the temperature rise slope in the normal drying mode.

[0040] Among them, the heating slope refers to the rate of change of temperature over time, which is the most direct indicator for evaluating how fast the temperature rises.

[0041] If the load is determined to be a mixed thermal response load, the controller will no longer use the conventional heating rate in the regular drying mode, such as 1.5°C / min. Instead, it will force a more gradual preset heating rate, such as 0.5°C / min to 0.8°C / min. The essence of this gradual heating strategy is to sacrifice some heating rate in exchange for low-temperature protection for thin and light loads, while preventing the surface of heavy loads from drying too quickly and forming a hard shell that hinders the diffusion of internal moisture.

[0042] The washing machine control method provided in this application accurately determines whether the load is a mixed thermal response load by using the state parameters of the pre-drying stage. This avoids blindly adopting conservative or aggressive strategies. When it is determined to be a mixed thermal response load, the method actively uses a preset heating slope that is lower than the conventional heating slope to control the washing machine to enter the main drying stage. By using a smaller heating rate, the method can effectively reduce the risk of thermal damage to light and thin loads while meeting the dehumidification needs of heavy loads. This avoids overheating damage to light and thin loads due to excessively fast heating or low drying efficiency due to excessively slow heating. The method balances the heat conflict between different thermal response loads and ensures the uniformity of drying.

[0043] If it is not a mixed thermal response load, then it is dried directly according to the conventional drying mode.

[0044] Optionally, please refer to Figure 3 The system determines whether a load is a mixed thermal response load based on state parameters, including: determining the effective dehumidification efficiency characteristics, motor power response fluctuation characteristics, and heat and moisture recovery characteristics based on state parameters; determining the load's thermal response difference index based on the effective dehumidification efficiency characteristics, motor power response fluctuation characteristics, and heat and moisture recovery characteristics; if the thermal response difference index is greater than a preset thermal response difference threshold within a preset time period, it is determined to be a mixed thermal response load. The preset time period is less than or equal to the total time of the pre-drying process.

[0045] Effective dehumidification efficiency reflects the rate at which moisture actually evaporates from the load per unit time. It can be calculated using the temperature and humidity difference between the inlet and outlet air. In mixed thermal response loads, thin clothing releases a large amount of moisture in the early stages, causing the dehumidification efficiency to rise rapidly initially and then fall back, forming a specific waveform.

[0046] The fluctuation characteristics of the motor's dynamic response reflect the impact of the load distribution within the cylinder on the motor drive. These characteristics can be calculated from the fluctuations in motor current and torque estimates. When thick and thin clothing are entangled, the motor's torque or current will exhibit more severe high-frequency fluctuations than under a uniform load.

[0047] Thermal and humidity recovery characteristics reflect the rate at which temperature and humidity recover to steady state under different loads when the heat pump components temporarily stop or the fan speed changes. Light loads recover quickly, while heavy loads recover slowly; this difference is a key indicator of mixed loads. Thermal and humidity recovery characteristics can be calculated from temperature change characteristics, humidity change characteristics, and recovery characteristics before and after a flip-over operation.

[0048] Based on the above three features, a comprehensive index, namely the thermal response difference index, is calculated using a preset algorithm, such as weighted, fuzzy logic, or neural network.

[0049] For example, the preset duration is 1 to 2 minutes.

[0050] To avoid misjudgments caused by instantaneous fluctuations, a certain time length, i.e., a preset duration, is set to observe the stability of the thermal response difference index.

[0051] In another embodiment, the controller may also determine that the current load is a mixed heat response load when at least two of the following five conditions are met: First, if the rate of temperature rise and the rate of humidity decrease do not match within a first preset time period, the temperature rises faster but the humidity decreases later; Second, the effective dehumidification efficiency corresponding to a unit heat input is lower than a preset range, or fluctuates beyond a preset range within a preset time window; Third, the fluctuation of motor current, torque estimate, or drum speed exceeds the corresponding preset range, indicating that the clothes are mixed in thickness, clumped together, stuck to the wall, or unevenly distributed; Fourth, after the drum tumbles or re-shakes, the time required for the temperature signal or humidity signal to recover to a stable state exceeds a preset recovery time; Fifth, the program mode, care level, washing and drying transition stage operation information, or historical operation information selected by the user indicate that the current load has the risk of drying mixed materials, mixed thicknesses, or clothes with different heat resistance capabilities together.

[0052] Optionally, before the washing machine enters the main drying stage according to the preset heating slope, the method further includes: determining a first uneven distribution index of the mixed thermal response load based on state parameters; if the first uneven distribution index is greater than a first preset uneven distribution threshold, then controlling the washing machine to operate according to a preset protection strategy.

[0053] Before entering the main drying stage, the uniformity of the mixed thermal response load inside the drum is checked. If the first uneven distribution index is greater than the first preset uneven distribution threshold, it indicates that the current uniformity is poor and the clothes are seriously tangled. If heating is performed directly at this time, it will cause local overheating. Therefore, the preset protection strategy is first used to improve the distribution of clothes so that the mixed thermal response load can reach a relatively loose and uniform distribution state as much as possible, so as to improve the uniformity of subsequent heating, avoid local overheating, and reduce the risk of overheating of thin clothes.

[0054] Optionally, the washing machine is controlled to operate according to a preset protection strategy, including at least one of the following strategies: controlling the drum to shake according to a first beat; controlling the heat pump assembly to operate according to a first preset power; controlling the compressor to increase its operating frequency according to a first preset rate; and controlling the fan to operate according to a first preset wind speed.

[0055] Shaking refers to the action of re-dispersing clothing that is stuck to the wall, clustered, or wrapped up by rotating the cylinder forward and backward, pausing, flipping at low speed, or using a specific rotation and stop rhythm.

[0056] The first cycle is characterized by a high frequency of forward and reverse switching, a short pause time, and a large acceleration, and is specifically designed to untangle entangled mixed thermal response loads.

[0057] The first preset power can be the lower or minimum power of the heat pump component to achieve a low-ramp temperature rise in the washing machine during this stage. The lower or minimum power of the heat pump component can be achieved by adjusting the compressor frequency or the on-off ratio. In other embodiments, the compressor frequency can be gradually increased according to the first preset rate to avoid shock.

[0058] The first preset airflow speed can be medium or medium-high to promote airflow circulation without drying out the load.

[0059] Optionally, before the washing machine enters the main drying stage according to the preset heating slope, the method further includes: determining that the load meets the preset conflict condition; determining that the load meets the preset conflict condition includes: determining a first heat conflict index of the mixed thermal response load based on state parameters; if the first heat conflict index is greater than a first preset heat conflict threshold, then determining that the load meets the preset conflict condition.

[0060] After identifying a mixed thermal response load, it is necessary to determine whether there is a significant thermal conflict. Specifically, a first thermal conflict index can be determined based on state parameters. This index comprehensively reflects the intensity of the conflict between the heavy load requiring high-temperature, intense heating and the light load requiring low-temperature protection. If this index is greater than a first preset thermal conflict threshold, it indicates that the heavy part still needs dehumidification while the light part is close to the protection boundary, resulting in a severe thermal conflict, and thus the preset conflict condition is met. Furthermore, to ensure the accuracy of data monitoring and avoid instantaneous fluctuation errors, the first thermal conflict index can be continuously observed within a preset observation window. If the first thermal conflict index is greater than the first preset thermal conflict threshold within the preset observation window, then the preset conflict condition is met.

[0061] The step "determine that the load meets the preset conflict conditions" can be executed after the step "control the washing machine to operate according to the preset protection strategy".

[0062] Optionally, the method further includes: determining a preset heating slope based on a first thermal conflict index and a conventional heating slope. For example, the following formula may be used:

[0063] Among them, S t S0 is the preset heating slope, α is the normal heating slope, and C is the adjustment coefficient. t It is the first thermal conflict index.

[0064] That is, the first thermal conflict index C t With the preset heating slope S t There is a negative correlation when the first thermal conflict index C t When the value increases, it indicates that the conflict between the heat input requirements of heavy loads and light loads intensifies, hence the preset temperature rise slope S. tReduce to avoid further escalation of thermal conflict; when the first thermal conflict index C t When the temperature decreases, it indicates that the conflict between the heat input demands of heavy loads and light loads is alleviated, and the preset temperature rise slope S is... t It can be restored to improve drying efficiency.

[0065] Furthermore, the controller can preset the heating slope S t Limited to a preset range [S] min S max [Inside, to balance drying efficiency and clothing protection.]

[0066] Optionally, please refer to Figure 4 The first thermal conflict index of the mixed thermal response load is determined based on the state parameters, including: determining the first heavy dehumidification demand index, the first light and thin protection risk index and the first uneven distribution index based on the state parameters; and determining the first thermal conflict index based on the first heavy dehumidification demand index, the first light and thin protection risk index and the first preset coefficient group.

[0067] The heavy dehumidification demand index is used to characterize the remaining dehumidification demand for heavy or highly moist clothing.

[0068] For example, the following formula can be used to determine the first heavy-duty dehumidification demand index based on state parameters:

[0069] Among them, M h For heavy dehumidification demand index, H cur For the current equivalent moisture content, η d To determine the degree of dehumidification completion, T res The remaining dehumidification task estimates are represented by α1 to α3, which are weighting coefficients.

[0070] The current equivalent humidity level can be estimated based on a combination of duct humidity, condensate temperature, outlet air temperature, and program running time. The dehumidification completion rate can be estimated by the difference between the current state and the target ending state. The remaining dehumidification task is estimated by the difference between the current equivalent humidity level and the target ending humidity level, where the target ending state and target ending humidity level are determined by the user-selected drying mode, drying level, or care requirements.

[0071] The first thin protection risk index is used to characterize the heat risk of thin, low-temperature resistant or near-dry clothing portions.

[0072] For example, the first thin and light protection risk index can be determined based on state parameters using the following formula:

[0073] Among them, R lAs the first thin and light protection risk index, T n To normalize the temperature level, S n To normalize the temperature rise slope, η e P represents the effective dehumidification efficiency per unit heat input. s These are the stage risk factors, with b1 to b4 being the weighting coefficients.

[0074] Preferably, the stage risk factor P s The stage is determined by the current drying stage. The drying stage may include a pre-drying stage, a dispersion improvement stage (the stage implementing preset protection strategies), a main drying stage, a main dehumidification stage, and a judgment drying stage. In the pre-drying stage and the dispersion improvement stage, because the system is still in a low heat input or limited heat input state, the stage risk factor takes a lower value; in the main drying stage and the main dehumidification stage, the stage risk factor takes a medium value; in the judgment drying stage, because thinner clothing is more likely to approach the drying end or local overheating boundary, the stage risk factor takes a higher value.

[0075] When the temperature is high, the temperature rises at a steeper rate, and the effective dehumidification efficiency decreases, it means that heat is more likely to accumulate on the surface of local clothing, increasing the risk to the protection of thin clothing.

[0076] The first uneven distribution index is used to characterize the degree to which clothing adheres to the drum wall, clumps together, tangles, or is unevenly distributed.

[0077] For example, the first distributional unevenness index can be determined based on state parameters using the following formula:

[0078] Among them, D u I is the first index of uneven distribution. f N represents the motor current fluctuation. f R represents the speed fluctuation. t The heat and moisture recovery time after the flipping action is denoted as c1 to c3, which are weighting coefficients.

[0079] Therefore, based on the first heavy dehumidification demand index, the first light and thin protection risk index, and the first preset coefficient group, the first heat conflict index can be determined with reference to the following formula:

[0080] Where Ct is the first thermal conflict index, M h For heavy dehumidification demand index, R l As the first thin and light protection risk index, D u K is the first uneven distribution index, and k1 to k3 are the weighting coefficients.

[0081] The above-mentioned reference formulas are preferred embodiments. In other embodiments, the first heavy dehumidification demand index, the first light and thin protection risk index, the first uneven distribution index, and the first heat-related conflict index can also be implemented through table lookup, model estimation, normalization mapping, threshold combination, or machine learning models. As long as they can reflect the corresponding physical meaning and be used for subsequent control, they all fall within the scope of this invention. The weight coefficients in the formulas are used to characterize the contribution of the corresponding sub-parameter to the target state quantity. The weight coefficients can be determined based on experimental calibration results, historical operating data fitting results, model training results, expert experience rules, or controller preset parameters. Preferably, each weight coefficient is a non-negative value and can be normalized to ensure that the comprehensive contribution of each sub-parameter to the target state quantity is within a comparable range. In other embodiments, the weight coefficients can also be dynamically adjusted according to the operating stage, clothing load characteristics, or control objectives.

[0082] Optionally, the washing machine is controlled to enter the main drying stage according to a preset temperature rise slope, including: controlling the heat pump component to operate according to the preset temperature rise slope, controlling the fan to operate according to the second preset wind speed, and controlling the drum to shake and disperse according to the second beat; the second beat is faster than the regular beat, and the regular beat is the shaking and dispersing beat in the regular drying mode.

[0083] The preset heating slope may include a preset heating slope and a maximum temperature threshold S. max The second preset airflow speed can be high, and furthermore, the airflow at the second preset airflow speed can be lower than that in the conventional drying mode to slow down the heat exchange rate and facilitate a gradual rise in temperature. A conventional cycle might be 15 seconds forward, 3 seconds pause, and 15 seconds reverse; while the second cycle could be 8 seconds forward, 1 second pause, and 8 seconds reverse, or even incorporate more complex speed changes or instantaneous reverse drive actions. A faster cycle can continuously disrupt the static friction between the loads, preventing re-entanglement under the gradually rising heat environment.

[0084] It should be understood that controlling the washing machine to enter the main drying stage according to the preset temperature rise slope is not simply about lowering the target temperature. Rather, when there is a conflict between the need for dehumidification of heavy items and the risk of damage to light items, the washing machine limits the temperature rise slope, increases the air volume, and adds a re-shaking action to convert more heat input into effective dehumidification rather than localized heat accumulation.

[0085] Optionally, after the washing machine enters the main drying stage according to the preset heating slope, the method further includes: obtaining the actual heating slope and the second heat conflict index; and correcting the second preset fan speed, the second cycle time, and the power of the heat pump component based on the deviation between the actual heating slope and the preset heating slope, and the second heat conflict index.

[0086] During the drying process, the system monitors two key feedback quantities in real time: the actual temperature rise rate and the second heat conflict index, to evaluate the current drying effect. This allows for timely correction of drying parameters to achieve the desired effect when there is a deviation between the drying effect and the expected effect, forming a closed-loop correction and improving the control accuracy of the drying process.

[0087] The method for obtaining the second heat conflict index can be the same as that for obtaining the first heat conflict index; the only difference between the two is the timing of the acquisition.

[0088] Optionally, the second heat-induced conflict index is determined by the second heavy dehumidification demand index, the second light protection risk index, and the second uneven distribution index. The second heavy dehumidification demand index, the second light protection risk index, and the second uneven distribution index can all be obtained by referring to the methods used for obtaining the first heavy dehumidification demand index, the first light protection risk index, and the first uneven distribution index; the only difference lies in the timing of their acquisition, which will not be elaborated upon here.

[0089] Based on the deviation between the actual heating slope and the preset heating slope, and the second heat conflict index, the second preset wind speed, the second cycle time, and the power of the heat pump component are corrected, including: if the actual heating slope is greater than the preset heating slope, the heat pump component is controlled to reduce the second preset power based on the current power, and the fan is controlled to reduce the third preset wind speed based on the second preset wind speed; if the second heavy dehumidification demand index is greater than the first preset heavy dehumidification demand threshold, and the second thin protection risk index is less than the preset thin protection risk threshold, the heat pump component is controlled to increase the third preset power based on the current power; if the second uneven distribution index is greater than the second preset uneven distribution threshold, the cylinder is controlled to accelerate the preset cycle time based on the second cycle time.

[0090] It should be understood that if the actual temperature rise slope is greater than the preset temperature rise slope, it means that the current heat input parameters (including heat pump component power, compressor frequency, fan speed, and power of other heating components) are too high, which increases the risk to light and thin loads. Therefore, at this time, the heat output parameters should be reduced immediately, such as reducing the power of the heat pump component (e.g., by 50W) and reducing the fan speed (e.g., by 100rpm).

[0091] If the second heavy-duty dehumidification demand index is greater than the first preset heavy-duty dehumidification demand threshold, and the second light-duty protection risk index is less than the preset light-duty protection risk threshold, meaning the second heavy-duty dehumidification demand index is still very high while the second light-duty protection risk index is acceptable, it indicates that the heavy load urgently needs more heat, while the current light load has not yet triggered an alarm. In this case, the controller will deviate from conventional logic and control the heat pump component to increase its power by a third preset value based on the current power, achieving a supervised aggressive compensation. This is the intelligent manifestation of the conflict balancing mechanism in this invention.

[0092] If the second uneven distribution index is greater than the second preset uneven distribution threshold, that is, the second uneven distribution index deteriorates again and the entanglement becomes more serious, the control cylinder will further accelerate the preset beat (for example, shortening from 8 seconds for forward and reverse rotation to 5 seconds) on the basis of the already fast second beat, and may increase the acceleration. Furthermore, the temperature will no longer rise in a short period of time to reserve time for improving the distribution.

[0093] Through the above closed-loop correction, the system can always maintain the actual temperature rise rate and load distribution state within an optimal feasible region in a dynamically changing conflict environment.

[0094] Optionally, after adjusting the second preset fan speed, the second cycle time, and the power of the heat pump component, the method further includes: if the second heat conflict index is less than the second preset heat conflict threshold and the second uneven distribution index is less than the third preset uneven distribution threshold within a third preset time period, then when the second heavy dehumidification demand index is greater than the second preset heavy dehumidification demand, the washing machine is controlled to enter the main dehumidification stage; when the second heavy dehumidification demand index is less than or equal to the second preset heavy dehumidification demand, the washing machine is controlled to enter the drying stage. The second preset heat conflict threshold can be less than the first heat conflict threshold.

[0095] After a period of correction, when the system detects that within the third preset time period, the second heat conflict index has dropped below the second preset heat conflict threshold, and the uneven distribution index is also lower than the third preset uneven distribution threshold, it indicates that the overall conflict has been alleviated and the distribution is uniform.

[0096] At this point, a final decision is made. If the second heavy load dehumidification demand index is greater than the second preset heavy load dehumidification demand, meaning the heavy load is still very wet, then the washing machine is controlled to enter the main dehumidification stage. For example, the main dehumidification stage can appropriately increase the temperature or extend the drying time under safe conditions to centrally remove the residual moisture from the heavy load. Its temperature constraint can refer to the temperature constraint of the main drying stage.

[0097] If the second heavy load dehumidification demand index is less than or equal to the second preset heavy load dehumidification demand, meaning that the heavy load has been basically dried, then the washing machine is controlled to directly enter the drying stage. The drying stage can be based on a conventional or enhanced humidity drying algorithm. The drying algorithm calculates whether the humidity of the current load has met the requirements for drying completion, so as to end the drying program in a timely manner.

[0098] It should be noted that the entry conditions of the main drying section have a higher priority than the exit conditions. The exit conditions are the conditions for entering the main dehumidification section or the judgment drying section, so as to form hysteresis control and avoid the system from frequently switching near the threshold.

[0099] This application also provides a control device for a washing machine; please refer to [link / reference]. Figure 5The device includes: a control module 201 configured to control the washing machine to perform a first preset time according to a pre-drying strategy; a status parameter acquisition module 202 configured to acquire the status parameters of the washing machine within the first preset time; and an analysis module 203 configured to determine whether the load is a mixed thermal response load based on the status parameters. The mixed thermal response load includes loads with different temperature rise characteristics, moisture release characteristics, or heat risk characteristics under the same heat input conditions. The control module 201 is also configured to control the washing machine to enter the main drying mode according to a preset temperature rise slope if the load is a mixed thermal response load and a preset conflict condition is met. The preset temperature rise slope is less than the normal temperature rise slope, and the normal temperature rise slope is the temperature rise slope in the normal drying mode.

[0100] This application embodiment also provides a washing machine, including a controller, which is configured to implement the washing machine control method described above when executed. The method includes the following steps: S101: Controlling the washing machine to perform a first preset time according to a pre-drying strategy. S102: Obtaining the state parameters of the washing machine within the first preset time. S103: Determining whether the load is a mixed thermal response load based on the state parameters; a mixed thermal response load includes loads with different temperature rise characteristics, moisture release characteristics, or heat risk characteristics under the same heat input conditions. S104: If so and a preset conflict condition is met, controlling the washing machine to enter the main drying stage (i.e., the main drying section) according to a preset temperature rise slope; wherein, the preset temperature rise slope is less than the normal temperature rise slope, and the normal temperature rise slope is the temperature rise slope in the normal drying mode.

[0101] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the washing machine control method described above. The method includes the following steps: S101: Controlling the washing machine to perform a first preset time according to a pre-drying strategy. S102: Obtaining the state parameters of the washing machine within the first preset time. S103: Determining whether the load is a mixed thermal response load based on the state parameters; a mixed thermal response load includes loads with different temperature rise characteristics, moisture release characteristics, or heat risk characteristics under the same heat input conditions. S104: If so and a preset conflict condition is met, controlling the washing machine to enter the main drying stage (i.e., the main drying section) according to a preset temperature rise slope; wherein, the preset temperature rise slope is less than the normal temperature rise slope, and the normal temperature rise slope is the temperature rise slope in the normal drying mode.

[0102] This application embodiment also provides a storage medium storing control instructions. When the control instructions are executed by a processor, the control method for a washing machine as described above is implemented. The method includes the following steps: S101: Controlling the washing machine to perform a first preset time according to a pre-drying strategy. S102: Obtaining the state parameters of the washing machine within the first preset time. S103: Determining whether the load is a mixed thermal response load based on the state parameters; a mixed thermal response load includes loads with different temperature rise characteristics, moisture release characteristics, or heat risk characteristics under the same heat input conditions. S104: If so and a preset conflict condition is met, controlling the washing machine to enter the main drying stage (i.e., the main drying section) according to a preset temperature rise slope; wherein, the preset temperature rise slope is less than the normal temperature rise slope, and the normal temperature rise slope is the temperature rise slope in the normal drying mode.

[0103] For example, a computer program can be divided into one or more modules / units, which are stored in memory and executed by a processor to perform the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in an electronic device.

[0104] Electronic devices can be desktop computers, laptops, handheld computers, and cloud servers, among other electronic devices. Electronic devices may include, but are not limited to, processors and memory. For example, electronic devices may also include input / output devices, network access devices, buses, etc.

[0105] The processor can be a Central Processing Unit (CPU), or 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. A general-purpose processor can be a microprocessor or any conventional processor.

[0106] In the embodiments provided by this invention, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. 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 devices or units may be electrical, mechanical, or other forms.

[0107] 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. Furthermore, the functional units in the various embodiments of this invention 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. The integrated units described above can be implemented in hardware or as software functional units.

[0108] If integrated modules / units 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, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program may include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. Computer-readable media may include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0110] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0111] The washing machine and its control method and control device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A control method for a washing machine, characterized in that, The method includes: Control the washing machine to execute the pre-drying strategy; Obtain the status parameters of the washing machine during the pre-drying process; Based on the state parameters, determine whether the load is a mixed thermal response load; If so, the washing machine will enter the main drying stage according to the preset heating slope; The preset heating slope is less than the conventional heating slope, and the conventional heating slope is the heating slope under the conventional drying mode.

2. The control method for a washing machine according to claim 1, characterized in that, The step of determining whether the load is a mixed thermal response load based on the state parameters includes: Based on the aforementioned state parameters, the characteristics of effective dehumidification efficiency, motor power response fluctuation, and heat and moisture recovery are determined. The thermal response difference index of the load is determined based on the effective dehumidification efficiency characteristics, the motor power response fluctuation characteristics, and the heat and moisture recovery characteristics. If the thermal response difference index is greater than the preset thermal response difference threshold within a preset time period, it is determined to be a mixed thermal response load.

3. The control method for a washing machine according to claim 1, characterized in that, Before the washing machine enters the main drying stage according to the preset temperature rise slope, the method further includes: The first uneven distribution index of the mixed thermal response load is determined based on the state parameters; If the first uneven distribution index is greater than the first preset uneven distribution threshold, then the washing machine is controlled to operate according to the preset protection strategy.

4. The control method for a washing machine according to claim 3, characterized in that, The control of the washing machine to operate according to a preset protection strategy includes at least one of the following strategies: Control the cylinder to disperse according to the first beat; Control the heat pump components to operate at the first preset power; Control the fan to operate at the first preset wind speed.

5. The control method for a washing machine according to claim 1, characterized in that, Before the washing machine enters the main drying stage according to the preset temperature rise slope, the method further includes: The load is determined to meet the preset conflict conditions; Determining that the load meets the preset conflict conditions includes: The first thermal conflict index of the hybrid thermal response load is determined based on the state parameters; If the first heat conflict index is greater than the first preset heat conflict threshold, then the load is determined to meet the preset conflict condition.

6. The control method for a washing machine according to claim 5, characterized in that, The method further includes: The preset heating slope is determined based on the first heat conflict index and the conventional heating slope.

7. The control method for a washing machine according to claim 5, characterized in that, Determining the first thermal conflict index of the mixed thermal response load based on the state parameters includes: Based on the aforementioned state parameters, the first heavy dehumidification demand index, the first light and thin protection risk index, and the first uneven distribution index are determined. Based on the first heavy dehumidification demand index, the first light and thin protection risk index, and the first preset coefficient group, the first heat conflict index is determined.

8. The control method for a washing machine according to claim 1, characterized in that, The step of controlling the washing machine to enter the main drying stage according to a preset temperature rise slope includes: The heat pump assembly is controlled to operate according to the preset heating slope, the fan is controlled to operate according to the second preset wind speed, and the cylinder is controlled to shake and disperse according to the second beat. The second beat is faster than the regular beat, which is the shaking beat in the regular drying mode.

9. The control method for a washing machine according to claim 8, characterized in that, After the washing machine enters the main drying stage according to a preset temperature rise slope, the method further includes: Obtain the actual heating slope and the second thermal conflict index; Based on the deviation between the actual heating slope and the preset heating slope, and the second heating conflict index, the second preset wind speed, the second cycle time, and the power of the heat pump component are corrected.

10. The control method for a washing machine according to claim 9, characterized in that, The second heat-related conflict index is determined by the second heavy dehumidification demand index, the second light and thin protection risk index, and the second uneven distribution index; The step of correcting the second preset wind speed, the second cycle time, and the power of the heat pump assembly based on the deviation between the actual heating slope and the preset heating slope, and the second heat conflict index, includes: If the actual temperature rise slope is greater than the preset temperature rise slope, then control the heat pump component to reduce the second preset power based on the current power, and control the fan to reduce the third preset wind speed based on the second preset wind speed; If the second heavy dehumidification demand index is greater than the first preset heavy dehumidification demand threshold and the second light protection risk index is less than the preset light protection risk threshold, then the heat pump component is controlled to increase the third preset power based on the current power. If the second uneven distribution index is greater than the second preset uneven distribution threshold, then the cylinder is controlled to accelerate the preset beat based on the second beat.

11. The control method for a washing machine according to claim 10, characterized in that, After correcting the second preset wind speed, the second cycle time, and the power of the heat pump component, the method further includes: If the second heat conflict index is less than the second preset heat conflict threshold and the second uneven distribution index is less than the third preset uneven distribution threshold within the third preset time period, then when the second heavy dehumidification demand index is greater than the second preset heavy dehumidification demand, the washing machine is controlled to enter the main dehumidification stage; when the second heavy dehumidification demand index is less than or equal to the second preset heavy dehumidification demand, the washing machine is controlled to enter the drying stage.

12. A control device for a washing machine, characterized in that, The device includes: The control module is configured to control the washing machine to execute the pre-drying strategy; The status parameter acquisition module is configured to acquire the status parameters of the washing machine during the pre-drying process. The analysis module is configured to determine whether the load is a mixed thermal response load based on the state parameters; The control module is also configured to control the washing machine to enter the main drying stage according to a preset heating slope if the preset conflict conditions are met. The preset heating slope is less than the conventional heating slope, and the conventional heating slope is the heating slope under the conventional drying mode.

13. A washing machine, characterized in that, Includes a controller configured to implement the control method for a washing machine as described in any one of claims 1-11 when executed.

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