A laundry machine spin control method and laundry machine

Abstract

The application discloses a kind of washing machine dehydration control method and washing machine, in the interval dehydration stage, according to the current power supply voltage value to determine its belonging power supply range interval, and with the interval of belonging power supply range interval determined when last time detecting current power supply voltage value is compared, when change occurs, the rotation stop ratio of motor is switched to the rotation stop ratio specified by the power supply range interval of current power supply voltage value, to reach the efficiency of real-time adjustment dehydration power consumption, avoid the situation that motor enters thermal protection occurs due to voltage increase in interval dehydration stage;In the continuous dehydration stage, the current power supply voltage value is detected in real time, if it is higher than the highest rated value and the duration of higher than the highest rated value exceeds the set duration, control motor to stop, motor is cooled by stopping working, when the current power supply voltage value detected is lower than the highest rated value, the motor is restarted to implement continuous dehydration, avoid the situation that motor enters thermal protection occurs due to voltage increase in continuous dehydration stage.

Description

Technical Field

[0001] This invention belongs to the field of washing machine control technology, specifically, it relates to a washing machine spin-drying control method and a washing machine. Background Technology

[0002] Fully automatic washing machines are widely recognized by consumers and promoted and applied around the world due to their advantages such as high degree of automation and labor saving.

[0003] The spin-drying stage of a fully automatic washing machine is divided into two stages: continuous spin and intermittent spin. Continuous spin refers to the motor continuously driving the spin-drying tub until the set time is met. Intermittent spin refers to the motor driving the spin-drying tub and stopping the driving operation at a certain start-stop ratio. During the driving stage, the motor runs and drives the spin-drying tub. During the stopping stage, the motor stops driving, and the spin-drying tub rotates by inertia.

[0004] In the current fully automatic washing machine's intermittent spin-dry design, the motor's start-stop time is set. The start-stop time varies for different platforms, but the start-stop ratio is fixed for the same platform. This leads to the following problems: In some countries or regions, the voltage is wide-range or unstable, with frequent high-voltage situations. Increased voltage will cause the motor's power to increase. If the increase exceeds the limit or causes the motor temperature to become too high, the motor will be controlled to enter thermal protection mode, resulting in an increase in user complaints. Summary of the Invention

[0005] The purpose of this invention is to propose a washing machine spin-drying control method and a washing machine, which solves the technical problem of motor thermal protection caused by unstable voltage. In the intermittent spin-drying stage, the motor's start-stop ratio is switched in real time according to the specified start-stop ratio within the power supply range to which the current power supply voltage value belongs. In the continuous spin-drying stage, the motor stops working when the current power supply voltage value exceeds the maximum rated value and continues for a set time. This avoids the situation where the motor enters thermal protection due to voltage increase during the spin-drying process, thereby improving the user experience and product quality.

[0006] The present invention is implemented using the following technical solutions:

[0007] A method for controlling the spin-drying process of a washing machine is proposed, including:

[0008] During the intermittent dehydration stage of the dehydration process, the following steps are performed at set time intervals:

[0009] Get the current supply voltage value;

[0010] Determine the power supply range to which the current power supply voltage value belongs;

[0011] When the power supply range changes relative to the previously determined power supply range, the motor's start-stop ratio is switched to the start-stop ratio specified for the power supply range of the current power supply voltage value.

[0012] During the continuous dehydration stage of the dehydration process, the following steps are performed:

[0013] Continuously monitor the current power supply voltage value;

[0014] If the current supply voltage is greater than the maximum rated value and the duration of the greater voltage exceeds the set duration, the motor will stop until the detected current supply voltage is lower than the maximum rated value, at which point the motor will restart.

[0015] Furthermore, the method also includes: specifying a standard spin-stop ratio for the intermittent spin-to-stop stage based on the washing machine's operating parameters; and modifying the motor's drive time and stop time based on the standard spin-stop ratio for each power supply range.

[0016] Furthermore, the method also includes: specifying a power supply range according to the operating parameters of the washing machine.

[0017] Furthermore, in the continuous dehydration stage of the dehydration process, the motor is stopped until the detected current power supply voltage value is lower than the maximum rated value, at which point the motor is restarted. Specifically, this includes: detecting the current power supply voltage value; determining the power supply range based on the current power supply voltage value; starting the motor with the specified start-stop ratio for the power supply range to which the current power supply voltage belongs, until the detected current power supply voltage value is lower than the rated value, and then switching back to the continuous dehydration stage.

[0018] Furthermore, during the continuous dehydration stage of the dehydration process, after the control motor stops and restarts when the detected current power supply voltage value is lower than the maximum rated value, the method further includes: if the detected current power supply voltage value is still not lower than the maximum rated value after a first set time period, a prompt is issued.

[0019] A washing machine is proposed, equipped with a spin-drying program, the spin-drying program including a continuous spin-drying stage and an intermittent spin-drying stage; including:

[0020] The voltage detection unit is used to provide feedback on the supply voltage.

[0021] Intermittent dehydration control unit, used to execute the following steps at set time intervals during the intermittent dehydration phase of the dehydration process:

[0022] Get the current supply voltage value;

[0023] Determine the current power supply voltage value within the specified power supply range;

[0024] When the power supply range changes relative to the previously determined power supply range, the motor's start-stop ratio is switched to the start-stop ratio specified for the power supply range of the current power supply voltage value.

[0025] The continuous dehydration control unit is used to perform the following steps during the continuous dehydration phase of the dehydration process:

[0026] If the current supply voltage is greater than the maximum rated value and the duration of the greater voltage exceeds the set duration, the motor will stop until the detected current supply voltage is lower than the maximum rated value, at which point the motor will restart.

[0027] Furthermore, the washing machine also includes: an intermittent spin-stop ratio specification unit, used to specify a standard spin-stop ratio for the intermittent spin stage according to the washing machine's operating parameters; and, for each power supply range, to modify the motor's drive time and stop time based on the standard spin-stop ratio.

[0028] Furthermore, the washing machine also includes a power supply range specification unit, used to specify a power supply range according to the washing machine's operating parameters.

[0029] Furthermore, the continuous disconnection control unit includes: a restart control subunit, used to restart the motor according to the following steps when the control motor stops until the detected current power supply voltage value is lower than the maximum rated value: detect the current power supply voltage value; determine the power supply range according to the current power supply voltage value; start the motor with the specified start-stop ratio of the power supply range to which the current power supply voltage belongs, until the detected current power supply voltage value is lower than the rated value, and then switch back to the continuous disconnection stage.

[0030] Furthermore, the washing machine also includes a prompting unit, which, during the continuous spin-drying stage of the spin-drying program, after the control motor stops and restarts when the detected current power supply voltage value is lower than the maximum rated value, issues a prompt if the detected current power supply voltage value is still not lower than the maximum rated value after a first set time period.

[0031] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The washing machine spin-drying control method and washing machine proposed in this invention address the intermittent spin-drying stage and the continuous spin-drying stage of the spin-drying program respectively. In the intermittent spin-drying stage, the power supply range to which the current power supply voltage value belongs is determined and compared with the power supply range determined when the current power supply voltage value was detected previously. When the power supply range changes, the motor's start-stop ratio in the intermittent spin-drying stage is switched to the start-stop ratio specified by the power supply range to which the current power supply voltage value belongs, thereby achieving real-time adjustment of spin-drying power consumption efficiency and avoiding the situation where the motor enters thermal protection due to voltage increase in the intermittent spin-drying stage. In the continuous spin-drying stage, the current power supply voltage value is detected in real time. If it is higher than the maximum rated value and the time it is higher than the maximum rated value exceeds the set time, the motor is controlled to stop, and the spin-drying drum rotates by inertia to perform spin-drying. The motor cools down by stopping work. When the detected current power supply voltage value is lower than the maximum rated value, the motor is restarted to perform continuous spin-drying, avoiding the situation where the motor enters thermal protection due to voltage increase in the continuous spin-drying stage.

[0032] Furthermore, in this invention, a standard spin-stop ratio for the intermittent spin-drying stage is specified based on the washing machine's operating parameters, such as the washing machine's maximum capacity, the motor's maximum drive power, the motor's maximum speed, the weight of the laundry, and the material of the laundry. Then, based on the standard spin-stop ratio, the spin-stop ratio is adjusted within different power supply ranges, making the power adjustment during the intermittent spin-drying stage more compatible with the entire machine.

[0033] Furthermore, in this invention, the power supply range is specified according to the operating parameters of the washing machine. The division of the power supply range varies depending on the operating parameters of the washing machine, making the power adjustment during the intermittent spin cycle more compatible with the entire machine.

[0034] Furthermore, during the continuous disconnection phase, when the motor is stopped due to the current power supply voltage exceeding the maximum rated value, the power supply voltage continues to be monitored. When the power supply voltage drops below the maximum rated value, the power supply range to which it belongs is first determined based on the current power supply voltage value. The motor is then started with the specified start-stop ratio for the power supply range until the current power supply voltage drops to the rated value. Then, the system switches to continuous disconnection mode, allowing the motor to cool down further to the safest state in an intermittent disconnection manner before switching back to continuous disconnection.

[0035] Furthermore, during the continuous spin-drying stage, when the motor is stopped due to the current power supply voltage exceeding the maximum rated value, the power supply voltage is continuously monitored. If the current power supply voltage has not dropped below the maximum rated value after the first set time, a prompt is issued to inform the user that spin-drying cannot proceed.

[0036] Other features and advantages of the present invention will become clearer after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of the steps of the washing machine spin-drying control method proposed in this invention;

[0039] Figure 2 This is a schematic diagram of the washing machine spin-drying control steps given in Embodiment 1 of the present invention;

[0040] Figure 3 This is a schematic diagram of the washing machine spin-drying control steps given in Embodiment 2 of the present invention;

[0041] Figure 4 This is a schematic diagram of the washing machine spin-drying control steps given in Embodiment 3 of the present invention;

[0042] Figure 5 This is a functional architecture diagram of a washing machine given in Embodiment 4 of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0046] 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] The present invention aims to provide a washing machine suitable for applications with unstable or wide voltage ranges, avoiding the problem of the motor entering thermal protection due to increased voltage during the spin-drying process, which would reduce the user experience.

[0048] Based on the above objectives, this invention proposes a washing machine spin-drying control method, applied in the spin-drying process, specifically, as follows: Figure 1 As shown, it includes the following steps:

[0049] Step S1: Start the dehydration process.

[0050] The dehydration process in this invention is divided into a continuous dehydration stage and an intermittent dehydration stage. In the continuous dehydration stage, the motor continuously drives the dehydration drum to rotate. In the intermittent dehydration stage, the motor drives the dehydration drum according to a set rotation-stop ratio. During the period when the motor stops driving, the dehydration drum rotates by inertia.

[0051] Step S21: During the intermittent dehydration stage of the dehydration process, obtain the current power supply voltage value at set time intervals.

[0052] The time interval here can be preset to a default value, a standard value, etc., or it can be calculated based on the working parameters of the washing machine. The aim is to provide a maximum time threshold as the time interval. Within this maximum time threshold, the motor can continue to drive without entering the thermal protection state after the power supply voltage is higher than the highest rated value.

[0053] The washing machine's operating parameters here include, for example, the washing machine's maximum capacity, the motor's maximum drive power, the motor's maximum speed, the weight of the laundry, and the material of the laundry.

[0054] The current power supply voltage value is obtained through feedback from the real-time input voltage detection circuit. The input voltage feedback circuit is built using components such as resistors, capacitors, and diodes, enabling the washing machine main controller to collect the power supply voltage in real time and convert the collected analog quantity into a digital quantity that the main controller can recognize through AD conversion.

[0055] Step S22: Determine the power supply range to which the current power supply voltage value belongs.

[0056] Each time the current power supply voltage value is obtained, the power supply range to which the voltage value belongs is queried.

[0057] The power supply range is, for example, based on the rated voltage of 220V, with 220V±5V as the first power supply range, 225V-240V as the second power supply range, and greater than 240V as the third power supply range.

[0058] Step S23: Determine whether the current power supply voltage range has changed relative to the previously determined power supply range.

[0059] If there is no change, the current switching ratio is maintained and the system is disconnected; if there is a change, that is, the power supply voltage increases or decreases and changes the power supply range, then proceed to step S24.

[0060] Step S24: Switch the motor's start-stop ratio to the start-stop ratio specified in the power supply range of the current power supply voltage value.

[0061] Different power supply ranges have different specified switching ratios; the higher the power supply voltage within a power supply range, the lower the switching ratio.

[0062] Then return to steps S21, S22, S23 and S24 and execute them in a loop.

[0063] Step S31: During the continuous dehydration stage of the dehydration process, continuously monitor the current power supply voltage value.

[0064] Once the dehydration process enters the continuous dehydration stage, the current power supply voltage value is continuously monitored.

[0065] Step S32: Determine whether the current power supply voltage value is greater than the maximum rated value.

[0066] Set a maximum rated value, such as 240V. When the supply voltage exceeds 240V, the motor temperature rises rapidly and it is easy to enter the thermal protection state.

[0067] If the current supply voltage is higher than the maximum rated value, proceed to step S33; otherwise, proceed to step S31 to continue the detection.

[0068] Step S33: Continuously monitor the current power supply voltage and start timing.

[0069] After the power supply voltage increases to exceed the maximum rated value, the timing starts and the current power supply voltage is continuously monitored. If the timing exceeds the set time, that is, if the power supply voltage exceeds the maximum rated value for a longer period than the set time, the process proceeds to step S34. If the timing does not reach the set time and the current power supply voltage detected is lower than the maximum rated value, the process returns to step S31.

[0070] Step S34: Stop the motor.

[0071] If the power supply voltage exceeds the maximum rated value for a duration longer than the set duration, the control motor will stop, and the dehydration drum will rotate by inertia to dehydrate.

[0072] Step S35: Continuously monitor the current power supply voltage and determine whether it is lower than the maximum rated value.

[0073] If the detected current power supply voltage value is still not lower than the maximum rated value after the first set time period has elapsed, a prompt will be issued. If the current power supply voltage drops below the maximum rated value before the first set time period has elapsed, then proceed to step S36.

[0074] Step S36: Restart the motor.

[0075] Re-enter the continuous stripping process.

[0076] The washing machine spin-drying control method proposed in this invention addresses the intermittent spin-drying stage and the continuous spin-drying stage of the spin-drying program. In the intermittent spin-drying stage, the current power supply voltage value is used to determine its corresponding power supply range, which is then compared with the range determined during the previous detection of the current power supply voltage value. When the power supply range changes, the motor's start-stop ratio in the intermittent spin-drying stage is switched to the ratio specified for the current power supply voltage range, achieving real-time adjustment of spin-drying power consumption and preventing the motor from entering thermal protection mode due to voltage increases during the intermittent spin-drying stage. In the continuous spin-drying stage, the current power supply voltage value is monitored in real-time. If it exceeds the maximum rated value for more than a set duration, the motor is stopped, and the spin-drying tub rotates by inertia to perform spin-drying. The motor cools down by stopping operation. When the detected current power supply voltage value falls below the maximum rated value, the motor is restarted to perform continuous spin-drying, preventing the motor from entering thermal protection mode due to voltage increases during the continuous spin-drying stage.

[0077] The following detailed description uses several specific embodiments to illustrate the application of the washing machine spin-drying control method proposed in this invention to washing machines.

[0078] Example 1

[0079] like Figure 2As shown in this embodiment, the washing machine spin-drying control method includes the following steps:

[0080] Step S41: Specify the standard spin-stop ratio for the intermittent spin stage according to the washing machine's operating parameters.

[0081] The operating parameters of a washing machine include, but are not limited to, parameters that affect the motor's output power, such as the washing machine's maximum capacity, the motor's maximum drive power, the motor's maximum speed, the weight of the laundry, and the material of the laundry.

[0082] Parameters such as the washing machine's maximum capacity, the motor's maximum drive power, and the motor's maximum speed are read from the washing machine's factory data stored in the memory, while parameters such as the weight of the laundry and the material of the laundry are obtained from the data measured and determined when the washing program starts.

[0083] The operating parameters of washing machines vary depending on the model, function, and operating conditions. In order to make the spin-drying control method of the washing machine more adaptable, the operating parameters of the washing machine are obtained at the beginning of the washing program or the beginning of the spin-drying program. A standard spin-stop ratio A / T is calculated by combining the set rules, weights, proportions and other calculation methods.

[0084] Step S42: For each power supply range, modify the motor's drive time and stop time based on the standard start-stop ratio.

[0085] Taking a region divided into three power supply zones as an example:

[0086] 1. The first power supply range is 220V±5V;

[0087] 2. The second power supply range is 225V-240V;

[0088] 3. The third power supply range is defined as greater than 240V.

[0089] For these three power supply ranges, modify the specified switching ratio for each power supply range based on the standard switching ratio. For example, specify:

[0090] The switching ratio for the first power supply range is A / T, the switching ratio for the second power supply range is (x1*A) / (T+x2), and the switching ratio for the third power supply range is (x3*A) / (T+x4); here x1 and x3 are positive numbers less than 1, and x1>x3, x2 and x4 are positive integers greater than or equal to 1, and x4>x2.

[0091] Step S43: Start the dehydration process.

[0092] Step S441: During the intermittent dehydration stage of the dehydration process, obtain the current power supply voltage value according to the set time interval.

[0093] The time interval set here is calculated based on the washing machine's operating parameters. The aim is to provide a maximum time threshold as the set time interval. Within this maximum time threshold, the motor can continue to drive without entering the thermal protection state after the power supply voltage is higher than the highest rated value.

[0094] Step S442: Determine the power supply range to which the current power supply voltage value belongs.

[0095] Each time the current power supply voltage value is obtained, the power supply range to which the voltage value belongs is queried.

[0096] Step S443: Determine whether the current power supply voltage range has changed relative to the previously determined power supply range.

[0097] If there is no change, the current switching ratio is maintained and the system is disconnected; if there is a change, that is, the power supply voltage increases or decreases and changes the power supply range, then proceed to step S444.

[0098] Step S444: Switch the motor's start-stop ratio to the start-stop ratio specified in the power supply range of the current power supply voltage value.

[0099] Different power supply ranges have different specified switching ratios; the higher the power supply voltage within a power supply range, the lower the switching ratio.

[0100] Then return to steps S441, S442, S443 and S444 and execute them in a loop.

[0101] Step S451: During the continuous dehydration stage of the dehydration process, continuously monitor the current power supply voltage value.

[0102] Once the dehydration process enters the continuous dehydration stage, the current power supply voltage value is continuously monitored.

[0103] Step S452: Determine whether the current power supply voltage value is greater than the maximum rated value.

[0104] Set a maximum rated value, such as 240V. When the supply voltage exceeds 240V, the motor temperature rises rapidly and it is easy to enter the thermal protection state.

[0105] If the current supply voltage is higher than the maximum rated value, proceed to step S453; otherwise, proceed to step S451 to continue the detection.

[0106] Step S453: Continuously monitor the current power supply voltage and start timing.

[0107] After the power supply voltage increases to exceed the maximum rated value, the timing starts and the current power supply voltage is continuously monitored. If the timing exceeds the set time, that is, if the power supply voltage exceeds the maximum rated value for a longer period than the set time, the process proceeds to step S454. If the timing does not reach the set time and the current power supply voltage detected is lower than the maximum rated value, the process returns to step S451.

[0108] Step S454: Control the motor to stop.

[0109] If the power supply voltage exceeds the maximum rated value for a duration longer than the set duration, the control motor will stop, and the dehydration drum will rotate by inertia to dehydrate.

[0110] Step S455: Continuously monitor the current supply voltage and determine whether it is lower than the maximum rated value.

[0111] If the detected current power supply voltage value is still not lower than the maximum rated value after the first set time period has elapsed, a prompt will be issued. If the current power supply voltage drops below the maximum rated value before the first set time period has elapsed, then proceed to step S456.

[0112] Step S456: Restart the motor.

[0113] Re-enter the continuous stripping process.

[0114] Example 2

[0115] like Figure 3 As shown in this embodiment, the washing machine spin-drying control method includes the following steps:

[0116] Step S51: Specify the power supply range according to the washing machine's operating parameters.

[0117] The operating parameters of a washing machine include, but are not limited to, parameters that affect the motor's output power, such as the washing machine's maximum capacity, the motor's maximum drive power, the motor's maximum speed, the weight of the laundry, and the material of the laundry.

[0118] Parameters such as the washing machine's maximum capacity, the motor's maximum drive power, and the motor's maximum speed are read from the washing machine's factory data stored in the memory, while parameters such as the weight of the laundry and the material of the laundry are obtained from the data measured and determined when the washing program starts.

[0119] The operating parameters of washing machines vary depending on the model, function, and usage conditions. In order to make the spin-drying control method of the washing machine more adaptable, the operating parameters of the washing machine are obtained at the beginning of the washing program or the beginning of the spin-drying program. Based on the set rules and priorities, several power supply range intervals are divided for the washing machine, such as the three power supply range intervals given in Example 1.

[0120] Step S52: Specify the standard spin-stop ratio for the intermittent spin stage according to the washing machine's operating parameters.

[0121] The operating parameters of washing machines vary depending on the model, function, and operating conditions. In order to make the spin-drying control method of the washing machine more adaptable, the operating parameters of the washing machine are obtained at the beginning of the washing program or the beginning of the spin-drying program. A standard spin-stop ratio A / T is calculated by combining the set rules, weights, proportions and other calculation methods.

[0122] Step S53: For each power supply range, modify the motor's drive time and stop time based on the standard start-stop ratio.

[0123] For these three power supply ranges, the switching ratios assigned to each power supply range are modified based on the standard switching ratio.

[0124] Step S54: Start the dehydration process.

[0125] Step S551: During the intermittent dehydration stage of the dehydration process, obtain the current power supply voltage value according to the set time interval.

[0126] The time interval set here is calculated based on the washing machine's operating parameters. The aim is to provide a maximum time threshold as the set time interval. Within this maximum time threshold, the motor can continue to drive without entering the thermal protection state after the power supply voltage is higher than the highest rated value.

[0127] Step S552: Determine the power supply range to which the current power supply voltage value belongs.

[0128] Each time the current power supply voltage value is obtained, the power supply range to which the voltage value belongs is queried.

[0129] Step S553: ​​Determine whether the current power supply voltage range has changed relative to the previously determined power supply range.

[0130] If there is no change, the current switching ratio is maintained and the system is disconnected; if there is a change, that is, the power supply voltage increases or decreases and changes the power supply range, then proceed to step S554.

[0131] Step S554: Switch the motor's start-stop ratio to the start-stop ratio specified in the power supply range of the current power supply voltage value.

[0132] Different power supply ranges have different specified switching ratios; the higher the power supply voltage within a power supply range, the lower the switching ratio.

[0133] Then return to steps S551, S552, S553 and S554 and execute them in a loop.

[0134] Step S561: During the continuous dehydration stage of the dehydration process, continuously monitor the current power supply voltage value.

[0135] Once the dehydration process enters the continuous dehydration stage, the current power supply voltage value is continuously monitored.

[0136] Step S562: Determine whether the current power supply voltage value is greater than the maximum rated value.

[0137] Set a maximum rated value, such as 240V. When the supply voltage exceeds 240V, the motor temperature rises rapidly and it is easy to enter the thermal protection state.

[0138] If the current supply voltage is higher than the maximum rated value, proceed to step S563; otherwise, proceed to step S561 to continue the detection.

[0139] Step S563: Continuously monitor the current power supply voltage and start timing.

[0140] After the power supply voltage increases to exceed the maximum rated value, the timing starts and the current power supply voltage is continuously monitored. If the timing exceeds the set time, that is, if the power supply voltage exceeds the maximum rated value for a longer period than the set time, the process proceeds to step S564. If the timing does not reach the set time and the current power supply voltage detected is lower than the maximum rated value, the process returns to step S561.

[0141] Step S564: Control the motor to stop.

[0142] If the power supply voltage exceeds the maximum rated value for a duration longer than the set duration, the control motor will stop, and the dehydration drum will rotate by inertia to dehydrate.

[0143] Step S565: Continuously monitor the current supply voltage and determine whether it is lower than the maximum rated value.

[0144] If the detected current power supply voltage value is still not lower than the maximum rated value after the first set time period has elapsed, a prompt will be issued. If the current power supply voltage drops below the maximum rated value before the first set time period has elapsed, then proceed to step S566.

[0145] Step S566: Restart the motor.

[0146] Re-enter the continuous stripping process.

[0147] Example 3

[0148] like Figure 4 As shown, this embodiment, based on Embodiment 1 and Embodiment 2, provides a washing machine spin-drying control method, including the following steps:

[0149] Step S61: Specify the power supply range according to the washing machine's operating parameters.

[0150] The operating parameters of a washing machine include, but are not limited to, parameters that affect the motor's output power, such as the washing machine's maximum capacity, the motor's maximum drive power, the motor's maximum speed, the weight of the laundry, and the material of the laundry.

[0151] Parameters such as the washing machine's maximum capacity, the motor's maximum drive power, and the motor's maximum speed are read from the washing machine's factory data stored in the memory, while parameters such as the weight of the laundry and the material of the laundry are obtained from the data measured and determined when the washing program starts.

[0152] The operating parameters of washing machines vary depending on the model, function, and usage conditions. In order to make the spin-drying control method of the washing machine more adaptable, the operating parameters of the washing machine are obtained at the beginning of the washing program or the beginning of the spin-drying program. Based on the set rules and priorities, several power supply range intervals are divided for the washing machine, such as the three power supply range intervals given in Example 1.

[0153] Step S62: Specify the standard spin-stop ratio for the intermittent spin stage according to the washing machine's operating parameters.

[0154] The operating parameters of washing machines vary depending on the model, function, and operating conditions. In order to make the spin-drying control method of the washing machine more adaptable, the operating parameters of the washing machine are obtained at the beginning of the washing program or the beginning of the spin-drying program. A standard spin-stop ratio A / T is calculated by combining the set rules, weights, proportions and other calculation methods.

[0155] Step S63: For each power supply range, modify the motor's drive time and stop time based on the standard start-stop ratio.

[0156] For these three power supply ranges, the switching ratios assigned to each power supply range are modified based on the standard switching ratio.

[0157] Step S64: Start the dehydration process.

[0158] Step S651: During the intermittent dehydration stage of the dehydration process, obtain the current power supply voltage value according to the set time interval.

[0159] The time interval set here is calculated based on the washing machine's operating parameters. The aim is to provide a maximum time threshold as the set time interval. Within this maximum time threshold, the motor can continue to drive without entering the thermal protection state after the power supply voltage is higher than the highest rated value.

[0160] Step S652: Determine the power supply range to which the current power supply voltage value belongs.

[0161] Each time the current power supply voltage value is obtained, the power supply range to which the voltage value belongs is queried.

[0162] Step S653: Determine whether the current power supply voltage range has changed relative to the previously determined power supply range.

[0163] If there is no change, the current switching ratio is maintained and the system is disconnected; if there is a change, that is, the power supply voltage increases or decreases and changes the power supply range, then proceed to step S654.

[0164] Step S654: Switch the motor's start-stop ratio to the start-stop ratio specified in the power supply range of the current power supply voltage value.

[0165] Different power supply ranges have different specified switching ratios; the higher the power supply voltage within a power supply range, the lower the switching ratio.

[0166] Then return to steps S651, S652, S653 and S654 and execute them in a loop.

[0167] Step S661: During the continuous dehydration stage of the dehydration process, continuously monitor the current power supply voltage value.

[0168] Once the dehydration process enters the continuous dehydration stage, the current power supply voltage value is continuously monitored.

[0169] Step S662: Determine whether the current power supply voltage value is greater than the maximum rated value.

[0170] Set a maximum rated value, such as 240V. When the supply voltage exceeds 240V, the motor temperature rises rapidly and it is easy to enter the thermal protection state.

[0171] If the current supply voltage is higher than the maximum rated value, proceed to step S663; otherwise, proceed to step S661 to continue the detection.

[0172] Step S663: Continuously monitor the current power supply voltage and start timing.

[0173] After the power supply voltage increases to exceed the maximum rated value, the timing starts and the current power supply voltage is continuously monitored. If the timing exceeds the set time, that is, if the power supply voltage exceeds the maximum rated value for a longer period than the set time, the process proceeds to step S664. If the timing does not reach the set time and the current power supply voltage detected is lower than the maximum rated value, the process returns to step S661.

[0174] Step S664: Control the motor to stop.

[0175] If the power supply voltage exceeds the maximum rated value for a duration longer than the set duration, the control motor will stop, and the dehydration drum will rotate by inertia to dehydrate.

[0176] Step S665: Continuously monitor the current supply voltage and determine whether it is lower than the maximum rated value.

[0177] If the detected current power supply voltage value is still not lower than the maximum rated value after the first set time period has elapsed, a prompt will be issued. If the current power supply voltage drops below the maximum rated value before the first set time period has elapsed, then proceed to step S6661.

[0178] Step S6661: Detect the current power supply voltage value.

[0179] Step S6662: Determine the power supply range based on the current power supply voltage value.

[0180] The power supply range at this time is referenced to the power supply range used for dynamic switching ratio adjustment during the intermittent disconnection phase.

[0181] Step S6663: Start the motor with the specified start-stop ratio within the power supply range of the current power supply voltage until the detected current power supply voltage value is lower than the rated value, then switch back to the continuous disconnection stage.

[0182] Obviously, the rated value in this embodiment is less than the maximum rated value.

[0183] In this embodiment, during the continuous disconnection stage, after the motor is stopped due to the current power supply voltage exceeding the maximum rated value, the power supply voltage value is continuously monitored. When the power supply voltage value drops below the maximum rated value, the power supply range to which it belongs is first determined based on the current power supply voltage value. The motor is then started with the specified start-stop ratio for the power supply range until the current power supply voltage drops to the rated value. Then, the continuous disconnection state is switched to allow the motor to cool down further to the safest state in an intermittent disconnection manner before switching back to continuous disconnection.

[0184] Example 4

[0185] This embodiment provides a washing machine for executing the spin-drying control method described in the above embodiments, corresponding to Embodiments 1 to 3. The washing machine is equipped with a spin-drying program, which includes a continuous spin-drying stage and an intermittent spin-drying stage, such as... Figure 5 As shown, it includes:

[0186] Voltage detection unit 1 is used to provide feedback on the power supply voltage.

[0187] Intermittent dehydration control unit 2 is used to perform the following steps at set time intervals during the intermittent dehydration phase of the dehydration process:

[0188] 1. Obtain the current power supply voltage value;

[0189] 2. Determine the power supply range specified by the current power supply voltage value;

[0190] 3. When the power supply range changes relative to the previously determined power supply range, the motor's start-stop ratio is switched to the start-stop ratio specified for the power supply range of the current power supply voltage value.

[0191] The continuous dehydration control unit 3 is used to perform the following steps during the continuous dehydration stage of the dehydration process:

[0192] If the current supply voltage is greater than the maximum rated value and the duration of the greater voltage exceeds the set duration, the motor will stop until the detected current supply voltage is lower than the maximum rated value, at which point the motor will restart.

[0193] The intermittent spin-stop ratio specification unit 4 is used to specify the standard spin-stop ratio for the intermittent spin stage according to the washing machine's operating parameters; and, for each power supply range, to modify the motor's drive time and stop time based on the standard spin-stop ratio.

[0194] Power supply range specification unit 5 is used to specify the power supply range according to the operating parameters of the washing machine.

[0195] The continuous disconnection control unit 3 includes:

[0196] Restart control subunit 31 is used to restart the motor after the control motor has stopped until the detected current supply voltage value is lower than the maximum rated value, following the steps as follows: detect the current supply voltage value; determine the supply range according to the current supply voltage value; start the motor with the specified start-stop ratio of the supply range to which the current supply voltage belongs, until the detected current supply voltage value is lower than the rated value, and then switch back to the continuous disconnection stage.

[0197] The prompting unit 6 is used in the continuous dehydration stage of the dehydration program. After the motor is stopped and restarted when the detected current power supply voltage value is lower than the maximum rated value, if the detected current power supply voltage value is still not lower than the maximum rated value after a first set time period, a prompt will be issued.

[0198] It should be noted that, in the specific implementation process, the control part mentioned above can be implemented by a hardware processor executing computer-executable instructions in software form stored in memory, which will not be elaborated here. The programs corresponding to the actions performed by the control can all be stored in the computer-readable storage medium of the system in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0199] The computer-readable storage media mentioned above may include volatile memory, such as random access memory; may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state drive; and may also include combinations of the above types of memory.

[0200] The term "processor" as mentioned above can also refer to a collective term for multiple processing elements. For example, a processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors, 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, and it can also be a special-purpose processor.

[0201] It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for controlling the spin-drying process of a washing machine, characterized in that, include: During the intermittent dehydration stage of the dehydration process, the following steps are performed at set time intervals: Get the current supply voltage value; Determine the power supply range to which the current power supply voltage value belongs; When the power supply range changes relative to the previously determined power supply range, the motor's start-stop ratio is switched to the start-stop ratio specified for the power supply range of the current power supply voltage value. During the continuous dehydration stage of the dehydration process, the following steps are performed: Continuously monitor the current power supply voltage value; If the current power supply voltage is greater than the maximum rated value and the duration of the greater than the maximum rated value exceeds the set duration, the motor will be stopped until the detected current power supply voltage is lower than the maximum rated value, at which point the motor will be restarted. The method further includes: The standard spin-stop ratio for the intermittent spin-down stage is specified according to the washing machine's operating parameters; For each power supply range, the motor's drive time and stop time are modified based on the standard start-stop ratio.

2. The washing machine spin-drying control method according to claim 1, characterized in that, The method further includes: Specify the power supply range based on the washing machine's operating parameters.

3. The washing machine spin-drying control method according to claim 1, characterized in that, During the continuous dehydration phase of the dehydration process, the motor is stopped and restarted only when the detected current supply voltage value is lower than the maximum rated value. Specifically, this includes: Detect the current power supply voltage value; Determine the power supply range based on the current power supply voltage value; The motor is started with the specified start-stop ratio within the current power supply voltage range until the detected current power supply voltage value is lower than the rated value, at which point it switches back to the continuous disconnection stage.

4. The washing machine spin-drying control method as described in claim 1, characterized in that, During the continuous dehydration phase of the dehydration process, after the motor is stopped and restarted when the detected current supply voltage value is lower than the maximum rated value, the method further includes: If the detected current power supply voltage value is still not lower than the maximum rated value after the first set time period has elapsed, a prompt will be issued.

5. A washing machine equipped with a spin-drying program, said spin-drying program including a continuous spin-drying stage and an intermittent spin-drying stage; characterized in that, include: The voltage detection unit is used to provide feedback on the supply voltage; Intermittent dehydration control unit, used to execute the following steps at set time intervals during the intermittent dehydration phase of the dehydration process: Get the current supply voltage value; Determine the power supply range to which the current power supply voltage value belongs; When the power supply range changes relative to the previously determined power supply range, the motor's start-stop ratio is switched to the start-stop ratio specified for the power supply range of the current power supply voltage value. The continuous dehydration control unit is used to perform the following steps during the continuous dehydration phase of the dehydration process: If the current power supply voltage is greater than the maximum rated value and the duration of the greater than the maximum rated value exceeds the set duration, the motor will be stopped until the detected current power supply voltage is lower than the maximum rated value, at which point the motor will be restarted. The washing machine also includes: The intermittent spin-stop ratio specification unit is used to specify the standard spin-stop ratio for the intermittent spin stage based on the washing machine's operating parameters; In addition, for each power supply range, the motor's drive time and stop time are modified based on the standard start-stop ratio.

6. The washing machine according to claim 5, characterized in that, The washing machine also includes: The power supply range specification unit is used to specify the power supply range based on the washing machine's operating parameters.

7. The washing machine according to claim 5, characterized in that, The deactivation control unit includes: The restart control subunit is used to restart the motor after it has stopped and the detected current supply voltage value is lower than the maximum rated value, following these steps: Detect the current power supply voltage value; Determine the power supply range based on the current power supply voltage value; The motor is started with the specified start-stop ratio within the current power supply voltage range until the detected current power supply voltage value is lower than the rated value, at which point it switches back to the continuous disconnection stage.

8. The washing machine according to claim 5, characterized in that, The washing machine also includes: The prompting unit is used in the continuous dehydration stage of the dehydration program. After the motor is stopped and restarted when the detected current power supply voltage value is lower than the maximum rated value, if the detected current power supply voltage value is still not lower than the maximum rated value after a first set time period, a prompt will be issued.

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