A method, device, and electronic equipment for controlling the operation of a washing machine's motor.

Abstract

This invention discloses a motor operation control method, device, electronic device, and readable storage medium for a washing machine. The method divides the current spin-drying process into multiple continuous time periods and calculates the product of the power change rate and the eccentricity value in each time period in real time. The product is then compared with the motor's limit power change rate at which no large vibration or noise is generated under the current weight of the clothes and the motor's eccentricity value. This allows for control of the motor's speed. The power change rate under low vibration and low noise conditions is used as a standard to correct the motor speed, finding a reasonable range for the motor's power change rate. The motor's operation is adjusted to maintain the current operating state under low vibration and low noise conditions. If the condition is not met, the speed is reduced to decrease the vibration and noise generated by the motor, thereby improving spin-drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology, specifically to a method, device, electronic equipment, and readable storage medium for controlling the operation of a washing machine's motor. Background Technology

[0002] DD motor torque motor is a special type of motor with soft mechanical characteristics and a wide speed range. When the load increases during motor operation, the motor speed automatically decreases to increase the output torque and maintain the load balance of the motor.

[0003] There are many causes of motor vibration, and the location and characteristics of the vibration vary. Currently, DD motors are used to directly drive washing machines. During the spin-drying process, the mass distribution of the load (the laundry) changes significantly. Existing technology relies on detecting the eccentricity of the DD motor before washing to determine whether to increase the speed (eccentricity is the maximum bending value of the rotor in one revolution at low speed). Motor vibration increases with the increase of eccentricity, resulting in greater spin-drying vibration and noise, thereby reducing the washing machine's washing performance. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a motor operation control method, device, electronic device and readable storage medium for washing equipment, so as to solve the technical problem that the washing machine has large dehydration vibration and noise during the dehydration process, which reduces the washing performance of the washing machine.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, a method for controlling the operation of a motor in a washing machine is provided, comprising:

[0007] Before each spin cycle starts, the weight of the clothes in the washing machine and the eccentricity value of the motor are obtained;

[0008] The current dehydration process is divided into multiple consecutive time periods. The product of the power change rate and the eccentricity value in each time period is calculated, and it is determined whether the product is greater than the target threshold in that time period. If so, the motor speed is reduced; otherwise, the motor speed is increased to enter the next time period.

[0009] The target threshold is the maximum power change rate of the motor when there is no large vibration or noise under the current weight of the clothing and the eccentricity of the motor.

[0010] Preferably, the method further includes:

[0011] The experiment was conducted to obtain the limit power change rate of the motor that would not produce large vibrations or noise for different clothing weights and motor eccentricity values, and a mapping table was established.

[0012] At the end of each time period, the weight of the clothes in the washing machine and the eccentricity value of the motor are reacquired. Based on the reacquired weight of the clothes and eccentricity value, the target threshold for the next time period is determined by looking up the mapping table.

[0013] Preferably, obtaining the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts includes:

[0014] The initial speed of the motor when the measurement of the weight of the clothes in the washing machine begins;

[0015] The second rotational speed of the motor after the weight of the clothes inside the washing machine has been measured;

[0016] The eccentricity of the motor is calculated based on the fluctuation value from the first speed to the second speed.

[0017] Preferably, the method further includes:

[0018] Record the power value at the start time and the power value at the end time for each time period;

[0019] The power change rate within the current time period is obtained by dividing the difference between the power value at the end time point and the power value at the start time point by the duration of the current time period.

[0020] Preferably, the method further includes:

[0021] If the dehydration process involves multiple steps, the duration of the subsequent dehydration process should be controlled to be greater than the duration of the previous dehydration process, and the maximum speed of the motor during the subsequent dehydration process should be controlled to be greater than the maximum speed of the motor during the previous dehydration process.

[0022] According to a second aspect of the present invention, a motor operation control device for a washing machine is provided, comprising:

[0023] The acquisition module is used to acquire the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts.

[0024] The control module is used to divide the current dehydration process into multiple consecutive time periods, calculate the product of the power change rate and the eccentricity value in each time period, and determine whether the product is greater than the target threshold in that time period. If so, the motor is controlled to slow down; otherwise, the motor is controlled to speed up to enter the next time period.

[0025] The target threshold is the maximum power change rate of the motor when there is no large vibration or noise under the current weight of the clothing and the eccentricity of the motor.

[0026] Preferably, the device further includes:

[0027] A module is established to obtain, through experiments, the limiting power change rate of motors that will not produce large vibrations and noise for different clothing weights and motor eccentricity values, and a mapping table is established.

[0028] The lookup module is used to re-acquire the weight of clothes in the washing machine and the eccentricity value of the motor at the end of each time period, and determine the target threshold for the next time period by looking up the mapping relationship table based on the re-acquired weight of clothes and eccentricity value.

[0029] Preferably, the acquisition module is used to acquire the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts, including:

[0030] The initial speed of the motor when the measurement of the weight of the clothes in the washing machine begins;

[0031] The second rotational speed of the motor after the weight of the clothes inside the washing machine has been measured;

[0032] The eccentricity of the motor is calculated based on the fluctuation value from the first speed to the second speed.

[0033] According to a third aspect of the present invention, a washing apparatus is provided, comprising:

[0034] A processor, and a memory connected to the processor;

[0035] The memory is used to store computer programs;

[0036] The processor is used to call and execute the computer program in the memory to perform the above-described method.

[0037] According to a fourth aspect of the present invention, a non-transitory computer-readable storage medium is provided storing computer instructions for causing a computer to perform the methods described above.

[0038] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0039] By dividing the current dehydration process into multiple consecutive time periods and calculating the product of the power change rate and the eccentricity value in each time period in real time, and comparing the product with the motor's limit power change rate when there is no large vibration or noise under the current weight of the clothes and the motor's eccentricity value, the motor speed is controlled. The power change rate under small vibration and low noise conditions is used as a standard to correct the motor speed, find a reasonable range of motor power change rate, and adjust the motor operation to maintain the current operating state under small vibration and low noise conditions. If the condition is not met, the speed is reduced to reduce the vibration and noise generated by the motor operation, thereby improving the dehydration efficiency.

[0040] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating a motor operation control method for a washing machine according to an exemplary embodiment;

[0042] Figure 2 This is a diagram illustrating the relationship between time and rotation speed in the spin-drying process of a washing machine according to an exemplary embodiment.

[0043] Figure 3 This is a flowchart illustrating a motor operation control method for a washing machine according to another exemplary embodiment;

[0044] Figure 4 This is a schematic block diagram of a motor operation control device for a washing machine according to an exemplary embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] As described in the background section, related technologies suffer from significant vibrations and noise during the spin-drying process of washing machines, which reduces their washing performance.

[0047] In order to effectively solve the problems in related technologies, the present invention provides a method, device, electronic device and readable storage medium for controlling the operation of a washing machine motor, which will be described in detail below.

[0048] Example 1

[0049] Figure 1 This is a flowchart illustrating a motor operation control method for a washing machine according to an exemplary embodiment, such as... Figure 1As shown, the method includes:

[0050] Step S11: Before each spin cycle starts, obtain the weight of the clothes in the washing machine and the eccentricity value of the motor;

[0051] Step S12: Divide the current dehydration process into multiple consecutive time periods, calculate the product of the power change rate and the eccentricity value in each time period, and determine whether the product is greater than the target threshold in that time period. If so, control the motor to slow down; otherwise, control the motor to speed up and enter the next time period. The target threshold is the limit power change rate of the motor when there is no large vibration or noise under the current weight of the clothes and the eccentricity value of the motor.

[0052] It should be noted that the technical solution provided in this embodiment is loaded into the controller of the washing equipment or into an electronic device connected to the controller of the washing equipment during actual operation. The washing equipment includes, but is not limited to, a washing machine.

[0053] Understandably, the product of the power change rate and the eccentricity value within each time period is calculated. If the product is greater than the target threshold for that time period, it indicates that the current washing machine is experiencing significant vibration and noise, and the motor needs to slow down. If the product is less than or equal to the target threshold for that time period, it indicates that the current vibration and noise of the washing machine are within a controllable range, and the motor speed can be increased to enter the next time period to continue the current spin-drying process.

[0054] It is understood that the technical solution provided in this embodiment divides the current dehydration process into multiple continuous time periods, calculates the product of the power change rate and the eccentricity value in each time period in real time, and compares the product with the limit power change rate of the motor when there is no large vibration and noise under the current weight of the clothes and the eccentricity value of the motor. In this way, the speed of the motor is controlled. The power change rate under small vibration and low noise is used as the standard for correcting the motor speed. A reasonable range of motor power change rate is found, and the motor operation is adjusted so that the current operating state is maintained under small vibration and low noise. If the condition is not met, the vibration and noise generated by the motor operation are reduced by slowing down, thereby improving the dehydration efficiency.

[0055] See Figure 2During operation, the washing machine experiences several speed increases. For example, after t1, the motor gradually increases its speed to n3 with a certain acceleration. Before this, the washing machine performs a weighing operation before t1, with the speed gradually increasing from n1 until the weighing is completed and the speed drops to n2, thus obtaining the eccentricity value (obtained during the n1-n2 phase by calculating the speed fluctuation value during the n1-n2 phase). The machine then determines whether this eccentricity value is within the allowable speed range. If it is, the motor increases its speed to n3 with a fixed acceleration a1, completing a basic spin-drying cycle. However, the significant changes in load eccentricity during the speed increase process cause large vibrations and noise during the washing machine's operation.

[0056] Experiments show that the motor power changes with the eccentricity during the speed increase process. Therefore, the power curve corresponding to t1 to t2 is divided into multiple continuous time periods, for example, evenly divided into five segments, and the power change rate within each time period is calculated. Through extensive experimental testing, the limiting power change rate that does not produce large vibrations and noise during the speed increase process at each speed stage is obtained for different clothing weights.

[0057] Specifically, through experiments, the limiting power change rate of the motor that will not produce large vibrations and noise was obtained for different clothing weights and motor eccentricity values, and a mapping relationship table was established.

[0058] At the end of each time period, the weight of the clothes in the washing machine and the eccentricity value of the motor are reacquired. Based on the reacquired weight of the clothes and eccentricity value, the target threshold for the next time period is determined by looking up the mapping table.

[0059] It is understandable that the target threshold determination method provided in this embodiment is simple and quick. Through a large number of experiments, the ultimate power change rate of the motor is determined when there will be no large vibration or noise under the current weight of clothing and the eccentricity value of the motor, which facilitates vibration reduction and noise reduction control in subsequent processes.

[0060] In practice, obtaining the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts includes:

[0061] The initial speed of the motor when the measurement of the weight of the clothes in the washing machine begins;

[0062] The second rotational speed of the motor after the weight of the clothes inside the washing machine has been measured;

[0063] The eccentricity of the motor is calculated based on the fluctuation value from the first speed to the second speed.

[0064] The eccentricity value is directly obtained from the controller of the washing machine. There are generally two methods: one is to calculate the speed difference, and the other is to calculate the motor power difference. The method of calculating the speed difference involves taking the average of the differences between the maximum speed (Tmax n) and the minimum speed (Tmin n) in each of n cycles as the eccentricity value. The formula is as follows:

[0065] [(Tmax1-Tmin1)+...+(Tmax n-Tmin n)] / n

[0066] Tmax n represents the maximum rotational speed within one cycle, and Tmin n represents the minimum rotational speed within one cycle, where n≥1.

[0067] Preferably, the method further includes:

[0068] Record the power value at the start time and the power value at the end time for each time period;

[0069] The power change rate within the current time period is obtained by dividing the difference between the power value at the end time point and the power value at the start time point by the duration of the current time period.

[0070] See Figure 2 Preferably, the method further includes:

[0071] If the dehydration process involves multiple steps, the duration of the subsequent dehydration process should be controlled to be greater than the duration of the previous dehydration process (for example, the duration of the dehydration process corresponding to time period t3 should be greater than the duration of the dehydration process corresponding to time period t2), and the maximum speed of the motor during the subsequent dehydration process should be controlled to be greater than the maximum speed of the motor during the previous dehydration process.

[0072] It is understandable that the washing machine goes through multiple spin-drying cycles, gradually accelerating to the highest speed, because the clothes inside the washing machine are uneven and biased to one side. The multiple spin-drying cycles, water intake and washing, and water draining and spin-drying make it easier to clean the clothes inside the washing machine.

[0073] Example 2

[0074] Figure 3 This is a flowchart illustrating a motor operation control method for a washing machine according to another exemplary embodiment, such as... Figure 3 As shown, the method includes:

[0075] Step S21: Obtain the limit power change rate of the motor that will not produce large vibration and noise for different clothing weights and motor eccentricity values ​​through experiments, and establish a mapping relationship table.

[0076] Step S22: Before each spin cycle starts, obtain the weight of the clothes in the washing machine and the eccentricity value of the motor;

[0077] Step S23: Divide the current dehydration process into multiple consecutive time periods, and calculate the product of the power change rate and the eccentricity value in each time period;

[0078] Step S24: At the end of each time period, reacquire the weight of the clothes in the washing machine and the eccentricity value of the motor, and determine the target threshold for the next time period by looking up the mapping table based on the reacquired weight of the clothes and eccentricity value.

[0079] Step S25: Determine whether the product is greater than the target threshold within the time period. If so, control the motor to slow down; otherwise, control the motor to increase its speed to enter the next time period.

[0080] It should be noted that the technical solution provided in this embodiment is loaded into the controller of the washing equipment or into an electronic device connected to the controller of the washing equipment during actual operation. The washing equipment includes, but is not limited to, a washing machine.

[0081] Understandably, the product of the power change rate and the eccentricity value within each time period is calculated. If the product is greater than the target threshold for that time period, it indicates that the current washing machine is experiencing significant vibration and noise, and the motor needs to slow down. If the product is less than or equal to the target threshold for that time period, it indicates that the current vibration and noise of the washing machine are within a controllable range, and the motor speed can be increased to enter the next time period to continue the current spin-drying process.

[0082] It is understood that the technical solution provided in this embodiment divides the current dehydration process into multiple continuous time periods, calculates the product of the power change rate and the eccentricity value in each time period in real time, and compares the product with the limit power change rate of the motor when there is no large vibration and noise under the current weight of the clothes and the eccentricity value of the motor. In this way, the speed of the motor is controlled. The power change rate under small vibration and low noise is used as the standard for correcting the motor speed. A reasonable range of motor power change rate is found, and the motor operation is adjusted so that the current operating state is maintained under small vibration and low noise. If the condition is not met, the vibration and noise generated by the motor operation are reduced by slowing down, thereby improving the dehydration efficiency.

[0083] Example 3

[0084] Figure 4 This is a schematic block diagram of a motor operation control device 100 for a washing machine according to an exemplary embodiment, as shown below. Figure 4 As shown, the device 100 includes:

[0085] The acquisition module 101 is used to acquire the weight of the clothes in the washing equipment and the eccentricity value of the motor before the current dehydration process starts.

[0086] The control module 102 is used to divide the current dehydration process into multiple consecutive time periods, calculate the product of the power change rate and the eccentricity value in each time period, and determine whether the product is greater than the target threshold in that time period. If so, the motor is controlled to slow down; otherwise, the motor is controlled to speed up and enter the next time period.

[0087] The target threshold is the maximum power change rate of the motor when there is no large vibration or noise under the current weight of the clothing and the eccentricity of the motor.

[0088] It should be noted that the technical solution provided in this embodiment is loaded into the controller of the washing equipment or into an electronic device connected to the controller of the washing equipment during actual operation. The washing equipment includes, but is not limited to, a washing machine.

[0089] Understandably, the product of the power change rate and the eccentricity value within each time period is calculated. If the product is greater than the target threshold for that time period, it indicates that the current washing machine is experiencing significant vibration and noise, and the motor needs to slow down. If the product is less than or equal to the target threshold for that time period, it indicates that the current vibration and noise of the washing machine are within a controllable range, and the motor speed can be increased to enter the next time period to continue the current spin-drying process.

[0090] The implementation methods and beneficial effects of each module are described in the above embodiments, and will not be repeated in this embodiment.

[0091] It is understood that the technical solution provided in this embodiment divides the current dehydration process into multiple continuous time periods, calculates the product of the power change rate and the eccentricity value in each time period in real time, and compares the product with the limit power change rate of the motor when there is no large vibration and noise under the current weight of the clothes and the eccentricity value of the motor. In this way, the speed of the motor is controlled. The power change rate under small vibration and low noise is used as the standard for correcting the motor speed. A reasonable range of motor power change rate is found, and the motor operation is adjusted so that the current operating state is maintained under small vibration and low noise. If the condition is not met, the vibration and noise generated by the motor operation are reduced by slowing down, thereby improving the dehydration efficiency.

[0092] Preferably, the device 100 further includes:

[0093] A module is established to obtain, through experiments, the limiting power change rate of motors that will not produce large vibrations and noise for different clothing weights and motor eccentricity values, and a mapping table is established.

[0094] The lookup module is used to re-acquire the weight of clothes in the washing machine and the eccentricity value of the motor at the end of each time period, and determine the target threshold for the next time period by looking up the mapping relationship table based on the re-acquired weight of clothes and eccentricity value.

[0095] It is understandable that the target threshold determination method provided in this embodiment is simple and quick. Through a large number of experiments, the ultimate power change rate of the motor is determined when there will be no large vibration or noise under the current weight of clothing and the eccentricity value of the motor, which facilitates vibration reduction and noise reduction control in subsequent processes.

[0096] Example 4

[0097] A washing apparatus according to an exemplary embodiment includes:

[0098] A processor, and a memory connected to the processor;

[0099] The memory is used to store computer programs;

[0100] The processor is used to call and execute the computer program in the memory to perform the above-described method.

[0101] It is understood that the technical solution provided in this embodiment divides the current dehydration process into multiple continuous time periods, calculates the product of the power change rate and the eccentricity value in each time period in real time, and compares the product with the limit power change rate of the motor when there is no large vibration and noise under the current weight of the clothes and the eccentricity value of the motor. In this way, the speed of the motor is controlled. The power change rate under small vibration and low noise is used as the standard for correcting the motor speed. A reasonable range of motor power change rate is found, and the motor operation is adjusted so that the current operating state is maintained under small vibration and low noise. If the condition is not met, the vibration and noise generated by the motor operation are reduced by slowing down, thereby improving the dehydration efficiency.

[0102] Example 5

[0103] An exemplary embodiment illustrates a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the methods described above.

[0104] It is understood that the technical solution provided in this embodiment divides the current dehydration process into multiple continuous time periods, calculates the product of the power change rate and the eccentricity value in each time period in real time, and compares the product with the limit power change rate of the motor when there is no large vibration and noise under the current weight of the clothes and the eccentricity value of the motor. In this way, the speed of the motor is controlled. The power change rate under small vibration and low noise is used as the standard for correcting the motor speed. A reasonable range of motor power change rate is found, and the motor operation is adjusted so that the current operating state is maintained under small vibration and low noise. If the condition is not met, the vibration and noise generated by the motor operation are reduced by slowing down, thereby improving the dehydration efficiency.

[0105] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.). The program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The storage medium can be a memory, magnetic disk, optical disk, etc.

[0106] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for controlling the operation of a motor in a washing machine, characterized in that, include: Before each spin cycle starts, the weight of the clothes in the washing machine and the eccentricity value of the motor are obtained; The current dehydration process is divided into multiple consecutive time periods. The product of the power change rate and the eccentricity value in each time period is calculated, and it is determined whether the product is greater than the target threshold in that time period. If so, the motor speed is reduced; otherwise, the motor speed is increased to enter the next time period. The target threshold is the maximum power change rate of the motor when there is no large vibration or noise under the current weight of the clothing and the eccentricity value of the motor. Specifically, the method further includes: The experiment was conducted to obtain the limit power change rate of the motor that would not produce large vibrations or noise for different clothing weights and motor eccentricity values, and a mapping table was established. At the end of each time period, the weight of the clothes in the washing machine and the eccentricity value of the motor are reacquired. Based on the reacquired weight of the clothes and eccentricity value, the target threshold for the next time period is determined by looking up the mapping table.

2. The method according to claim 1, characterized in that, Before each spin cycle is started, the weight of the clothes inside the washing machine and the eccentricity value of the motor are obtained, including: The initial speed of the motor when the measurement of the weight of the clothes in the washing machine begins; The second rotational speed of the motor after the weight of the clothes inside the washing machine has been measured; The eccentricity of the motor is calculated based on the fluctuation value from the first speed to the second speed.

3. The method according to claim 1, characterized in that, Also includes: Record the power value at the start time and the power value at the end time for each time period; The power change rate within the current time period is obtained by dividing the difference between the power value at the end time point and the power value at the start time point by the duration of the current time period.

4. The method according to any one of claims 1 to 3, characterized in that, Also includes: If the dehydration process involves multiple steps, the duration of the subsequent dehydration process should be controlled to be greater than the duration of the previous dehydration process, and the maximum speed of the motor during the subsequent dehydration process should be controlled to be greater than the maximum speed of the motor during the previous dehydration process.

5. A motor operation control device for a washing machine, characterized in that, The motor operation control method for the washing equipment according to any one of claims 1-4 includes: The acquisition module is used to acquire the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts. The control module is used to divide the current dehydration process into multiple consecutive time periods, calculate the product of the power change rate and the eccentricity value in each time period, and determine whether the product is greater than the target threshold in that time period. If so, the motor is controlled to slow down; otherwise, the motor is controlled to speed up to enter the next time period. The target threshold is the maximum power change rate of the motor when there is no large vibration or noise under the current weight of the clothing and the eccentricity of the motor.

6. The apparatus according to claim 5, characterized in that, Also includes: A module is established to obtain, through experiments, the limiting power change rate of motors that will not produce large vibrations and noise for different clothing weights and motor eccentricity values, and a mapping table is established. The lookup module is used to re-acquire the weight of clothes in the washing machine and the eccentricity value of the motor at the end of each time period, and determine the target threshold for the next time period by looking up the mapping relationship table based on the re-acquired weight of clothes and eccentricity value.

7. The apparatus according to claim 5, characterized in that, The acquisition module is used to acquire the weight of the clothes in the washing machine and the eccentricity value of the motor before the current dehydration process starts, including: The initial speed of the motor when the measurement of the weight of the clothes in the washing machine begins; The second rotational speed of the motor after the weight of the clothes inside the washing machine has been measured; The eccentricity of the motor is calculated based on the fluctuation value from the first speed to the second speed.

8. A laundry appliance, characterized in that, include: A processor, and a memory connected to the processor; The memory is used to store computer programs; The processor is used to call and execute the computer program in the memory to perform the method according to any one of claims 1 to 4.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-4.

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