Dewatering control method and washing machine
By using a drum-collision switch to differentiate between small and large eccentricities, and combining this with speed control and correction measures, the eccentricity problem during the washing machine's spin-drying process was solved, resulting in stable spin-drying and improved user satisfaction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TCL HOME APPLIANCES (HEFEI) CO LTD
- Filing Date
- 2025-01-06
- Publication Date
- 2026-06-16
Smart Images
Figure CN119663596B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of washing technology, and more particularly to a dehydration control method and a washing machine. Background Technology
[0002] In the operation of a washing machine, clothes are sent to the spin-drying stage after washing. If the clothes inside the drum are unevenly distributed at this time, causing eccentricity, the inner drum will continuously hit the machine body, which can not only cause the washing machine to shift or even be damaged, but also generate a lot of noise. However, if the washing machine is stopped abruptly, frequent shutdowns will prolong the washing time and lead to customer complaints.
[0003] Therefore, accurately determining whether a washing machine is eccentric and promptly correcting the center of gravity of the inner drum has become a challenge. Summary of the Invention
[0004] This application provides a spin-drying control method and a washing machine. The spin-drying control method can quickly identify the eccentricity of the inner tub and correct the center of gravity of the inner tub in a timely manner.
[0005] This application provides a spin-drying control method applied to a washing machine. The washing machine includes an inner tub, a motor, a drain valve, and a drum-bumping switch. The motor is connected to the inner tub to drive it to rotate. The drain valve is connected to the inner tub. The drum-bumping switch has a first sensitivity range and a second sensitivity range, wherein the first sensitivity range is lower than the second sensitivity range. The spin-drying control method includes:
[0006] S1: Obtain dehydration command;
[0007] S2: Open the drain valve;
[0008] S3: Control the rotation speed of the inner barrel to increase to the first rotation speed;
[0009] S4: Adjust the barrel-banging switch to the first sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open;
[0010] S5: If so, the inner tub will be automatically started, water will be added to correct the deviation, or the inner tub will be controlled to stop rotating;
[0011] S6: If not, adjust the barrel-banging switch to the second sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open;
[0012] S7: If so, then add water to the inner tub to correct its deviation or control the inner tub to stop rotating;
[0013] S8: If not, control the inner tub to maintain the first rotation speed for dehydration.
[0014] This application embodiment also provides a washing machine, including an inner tub, a motor, a drain valve, a first drum-collision switch, a second drum-collision switch, a memory, and a processor. The processor executes the spin-drying control method as described above by calling a computer program stored in the memory.
[0015] This application provides a spin-drying control method and a washing machine. The spin-drying control method is applied to a washing machine, which includes an inner tub, a motor, a drain valve, and a drum-stopping switch. The motor drives the inner tub to rotate, and the drain valve is connected to the inner tub to drain water. The first sensitivity range of the drum-stopping switch is lower than the second sensitivity range of the drum-stopping switch. The spin-drying control method includes: receiving a spin-drying command and starting the program; opening the drain valve to prepare for drainage; increasing the inner tub speed to a preset first speed; activating the first drum-stopping switch to a closed state and monitoring whether it is opened by a knock. If it is opened, it is determined to be a small eccentricity state, and measures such as self-starting, water replenishment and correction, or stopping the rotation of the inner tub are taken. If the first drum-stopping switch remains closed, the second drum-stopping switch is also closed, and its state is monitored. If the second drum-stopping switch is opened by a knock, it is determined to be a large eccentricity state, and operations such as water replenishment and correction or stopping the rotation of the inner tub are performed. If the drum-stopping switch is not opened during the above process, the inner tub maintains the first speed and continues to spin-dry. This dehydration control method can not only effectively monitor the eccentricity of the inner drum, but also take timely corrective measures to ensure the stability of the dehydration process. Attached Figure Description
[0016] 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 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.
[0017] Figure 1 A logic flowchart of a washing machine provided in an embodiment of this application.
[0018] Figure 2 This is a schematic flowchart of the dehydration control method provided in the embodiments of this application.
[0019] Figure 3 This is a first logic flowchart of the dehydration control method provided in the embodiments of this application.
[0020] Figure 4 This is a second logic flowchart of the dehydration control method provided in the embodiments of this application. Detailed Implementation
[0021] 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.
[0022] This application provides a spin-drying control method and a washing machine. This spin-drying control method can quickly identify the eccentricity of the inner tub and correct the center of gravity of the inner tub in a timely manner. The following is a detailed description with reference to the accompanying drawings.
[0023] Please see Figure 1 , Figure 1 A logic flowchart of a washing machine provided in an embodiment of this application.
[0024] This application provides a dehydration control method applied to a washing machine. The washing machine can be categorized as a drum washing machine, pulsator washing machine, agitator washing machine, jet washing machine, spray washing machine, or vibratory washing machine; this embodiment does not limit the type of washing machine.
[0025] The washing machine's washing process includes the following steps: Step 1: Main wash program; Step 2: Swirling program; Step 3: Spin-dry program; Step 4: Rinse program; Step 5: Determine if the number of rinse cycles exceeds the target number of rinse cycles (e.g., the target number of rinse cycles is 2). If not, repeat steps 2 to 4. If yes, proceed to step 6: Shaking program; Step 7: Spin-dry program.
[0026] The dehydration control method in this embodiment mainly applies to step 6: the dehydration program in the washing machine's washing process described above. It can also be applied to the dehydration program in step 3 above, and further to the single dehydration function of the washing machine. The dehydration control method in this application can be set and enabled according to actual conditions; the specific application method is not limited.
[0027] The spin-drying process of a washing machine can be divided into three main stages: intermittent spin, main spin, and continuous spin. Intermittent spin is the process in which the washing machine motor starts to rotate and the motor speed increases from 0 RPM to the set target speed. Main spin is the process in which the set target speed is maintained for spin-drying. Continuous spin is the process in which the speed decreases from the set target speed to 0 RPM (including braking).
[0028] The washing machine includes an inner tub, a motor, a drain valve, and a drum-slamming switch. The motor is connected to the inner tub to drive it to rotate for washing or spin-drying clothes. The drain valve is connected to the inner tub. The drum-slamming switch has a first sensitivity range and a second sensitivity range, where the first sensitivity range is lower than the second sensitivity range. For example, the first sensitivity range is (x, y]; and the second sensitivity range is (y, +∞).
[0029] The inner tub is used to hold the clothes to be washed.
[0030] The drum-stop switch, also known as the drum-stop linkage, is a safety device on a washing machine. During normal operation, the drum-stop switch remains closed / open. When the inner drum of the washing machine strikes the drum-stop switch, the switch opens / closes; that is, the state of the drum-stop switch changes when the inner drum of the washing machine hits the cabinet.
[0031] The drum-banging switch has a closed or open state. During drum banging, the switch changes state, switching between open and closed. After washing, clothes tangling together can cause imbalance in the inner drum, resulting in eccentricity. While clothes in the inner drum are prone to eccentricity, the degree of eccentricity varies, ranging from minor to major. Minor eccentricity can develop into major eccentricity, which can prevent the inner drum from rotating at high speed, cause the machine to shift due to impact with the casing, and generate significant noise.
[0032] Regarding the two eccentricity scenarios, the drum-banging switch proposed in this application has a first sensitivity range and a second sensitivity range, corresponding to small eccentricity and large eccentricity, respectively. That is, when the drum-banging switch is within the first sensitivity range, the switch is struck by the inner drum and changes from a closed state to an open state, indicating that the inner drum may be in a small eccentricity state; when the drum-banging switch is within the second sensitivity range, the switch is struck by the inner drum and changes from a closed state to an open state, indicating that the inner drum is in a large eccentricity state.
[0033] The sensitivity of the drum-stop switch refers to the impact duration of the inner drum striking the switch, i.e., the length of time it takes for the switch state to change. This helps determine the degree of eccentricity of the clothes inside the washing machine drum, distinguishing between minor and major eccentricity. The washing machine uses a drum-stop switch, or drum-stop linkage, as a safety device. During normal operation, the switch remains closed / open; upon impact, it opens / closes. The impact duration is the length of time the switch remains open / closed. The sensitivity of this drum-stop switch is measured in milliseconds (ms).
[0034] Please see Figure 2 as well as Figure 3 , Figure 2 This is a schematic flowchart of the dehydration control method provided in the embodiments of this application. Figure 3This is a first logic flowchart of the dehydration control method provided in the embodiments of this application.
[0035] The dehydration control method includes the following steps.
[0036] S1: Obtain the dehydration command.
[0037] S2: Open the drain valve to lower the water level in the inner tank.
[0038] S3: Controls the inner tub's rotation speed to increase to the first rotation speed. This first rotation speed can be the highest rotation speed of the washing machine during the spin-drying program. The speed increase can be gradual and uniform.
[0039] S4: Adjust the barrel-banging switch to the first sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open.
[0040] When the inner tub is at its first rotation speed, the system first checks if the inner tub is slightly off-center. If the inner tub is only slightly off-center, the drum-collision switch, which is within the first sensitivity range, may be tripped by the inner tub. If, in this case, the system initiates water replenishment or drainage to eliminate the off-center simply because the inner tub is detected colliding with the drum-collision switch, it will significantly impact the washing machine's efficiency, waste water, and may even lead to excessive water replenishment, affecting the spin-drying effect. Alternatively, triggering a shutdown alarm simply because the inner tub is detected colliding with the drum-collision switch could result in excessive alarms and customer complaints.
[0041] Therefore, in this embodiment of the application, the case of the inner channel being slightly off-center is handled.
[0042] S5: If so, the motor will be powered off, and the inner tub will be automatically started, replenished with water to correct its deviation, or the inner tub will be stopped from rotating.
[0043] In this application, the self-starting of the inner tub refers to the inner tub's speed first decreasing and then increasing. This not only avoids misjudgment of the drum-collision switch, but also utilizes inertia to correct deviation during the process of speed reduction and acceleration, and reduces the number of times water is added for correction and shutdown.
[0044] If the self-starting function cannot eliminate the slight eccentricity, the inner tank can be replenished with water to correct the eccentricity. This involves filling the inner tank with water and spreading it evenly to eliminate the eccentricity.
[0045] If the slight eccentricity cannot be eliminated by self-starting and water replenishment correction, the inner tub can be stopped from rotating to allow for further manual detection of the fault.
[0046] During the above process, the slight eccentricity of the inner tub is gradually resolved, and the dehydration process of the inner tub is maintained as continuously as possible.
[0047] It is worth noting that among the three solutions of self-starting, water replenishment and correction, and controlling the inner tub to stop rotating, there may be only one solution, two solutions, or all three solutions.
[0048] S6: If not, adjust the barrel-banging switch to the second sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open;
[0049] If the inner tub does not have a small eccentricity, then continue to check if the inner tub has a large eccentricity or no eccentricity.
[0050] S7: If so, the motor will be powered off, and the inner tub will be refilled with water to correct its misalignment or the inner tub will be stopped from rotating. If the drum-collision switch, which is in the second sensitivity range, is activated by the inner tub, it indicates that the inner tub is in a state of large eccentricity. In this case, the inner tub will be refilled with water to correct its misalignment or the inner tub will be stopped from rotating to prevent the washing machine from shifting abnormally or the cabinet from being deformed by impact.
[0051] S8: If not, control the inner tub to maintain the first rotation speed for spin-drying. If the drum-collision switch, which is in the second sensitivity range, is not activated by the inner tub, it means that the inner tub is neither slightly eccentric nor significantly eccentric, and the spin-drying process is proceeding normally.
[0052] In step S8, the duration T4 of the inner tub rotating at the first speed is calculated. If the duration T4 is greater than the fourth preset duration t4, the process ends. At this point, the dehydration process ends.
[0053] Please see Figure 4 , Figure 4 This is a second logic flowchart of the dehydration control method provided in the embodiments of this application.
[0054] In some embodiments, for the self-starting of the inner tub in step S5, the dehydration control method includes the following steps: controlling the drain valve to close; calculating the first power-off duration T1 of the motor; when the first power-off duration T1 is greater than the first preset duration t1, opening the drain valve and returning to step S3 to self-start the inner tub.
[0055] In this embodiment, to prevent the clothes in the inner tub from being misaligned and moving away from the drum-collision switch, thus failing to detect a small misalignment and resulting in poor spin-drying performance, the inner tub is restarted when a small misalignment is detected. This not only prevents misjudgment but also allows for inertial correction as the inner tub's speed increases or decreases.
[0056] In some embodiments, after the motor is powered off in step S5, the dehydration control method further includes: calculating the number of times the motor is powered off, denoted as M; when M is greater than or equal to a first preset number m, then water is added to the inner tub for correction or the inner tub is controlled to stop rotating; when M is less than the first preset number m, then the inner tub is automatically started.
[0057] Specifically, when M is less than the first preset number of times m, the inner tub will start automatically, that is, wait for the first power outage time T1 to be greater than the first preset time t1, then open the drain valve and return to step S3 to start the inner tub automatically.
[0058] Understandably, if the slight eccentricity of the inner tub cannot be improved after multiple self-starts, the system will further replenish water to correct the eccentricity or control the inner tub to stop rotating, ultimately improving the slight eccentricity of the inner tub.
[0059] The first preset number of times m can be 2 or 3.
[0060] This includes replenishing water to correct the inner tub's alignment or stopping its rotation, including:
[0061] The number of correction cycles for the inner tub is calculated. This number includes a first value, M', which is the ratio of M to a first preset number of cycles m. As described above, every m power outages of the motor will trigger one water replenishment correction cycle or stop the inner tub from rotating. By calculating the first ratio, the number of correction cycles when the inner tub is in a slightly eccentric state can be determined.
[0062] When the number of correction attempts is greater than or equal to the second preset number, the inner tub will stop rotating and an alarm will sound to remind the user to check manually.
[0063] If the number of correction attempts is less than the second preset number, the inner tank will be replenished with water for correction.
[0064] The number of correction attempts can indicate the difficulty of improving a slightly eccentric inner tub, allowing for different methods to be used to correct the eccentric state of the inner tub.
[0065] In some embodiments, step S6: replenishing water to correct the deviation of the inner tub or controlling the inner tub to stop rotating includes: controlling the motor to power off and closing the drain valve; calculating the number of times the motor is powered off, denoted as N; calculating the number of times the inner tub is corrected, the number of times the deviation is corrected includes a second value, which is N; when the number of times the deviation is corrected is greater than or equal to a second preset number, controlling the inner tub to stop rotating and triggering an alarm; when the number of times the deviation is corrected is less than the second preset number, replenishing water to correct the deviation of the inner tub.
[0066] When the inner tub is detected to be in a state of large eccentricity, the system will further replenish water to correct the eccentricity or control the inner tub to stop rotating, ultimately improving the state of large eccentricity of the inner tub.
[0067] Similar to the inner tub being in a slightly off-center state, when the number of corrections is greater than or equal to the second preset number, the inner tub will stop rotating and an alarm will sound to remind the user to check manually.
[0068] If the number of correction attempts is less than the second preset number, the inner tank will be replenished with water for correction.
[0069] The number of correction attempts can indicate the difficulty of improving a large eccentricity in the inner tub, allowing for different methods to be used to correct the eccentricity.
[0070] In this embodiment of the application, the number of times the inner tub is in a small eccentric state and the number of times the inner tub is in a large eccentric state can be added together to comprehensively evaluate the eccentricity of the washing machine during the spin-drying program.
[0071] In some embodiments, the washing machine includes a water inlet valve to introduce water into the inner tub of the washing machine, thereby raising the water level in the inner tub. The water replenishment and correction includes: controlling the water inlet valve to open; detecting the water level in the inner tub; if the water level is greater than a first preset water level h, then closing the water inlet valve; controlling the inner tub to shake and calculating the duration T2 of the shaking; if the duration T2 is greater than a second preset duration t2, then returning to step S1.
[0072] In other words, when the washing machine is replenishing water to correct its alignment, it cannot spin-dry the clothes. It needs to replenish water to flatten and shake out the clothes before spinning them again.
[0073] However, during the water replenishment process of the washing machine, the water level may drop as the clothes are shaken and spread out, which may reduce the washing machine's effectiveness in shaking and spreading the clothes. Therefore, in this embodiment, the water level in the inner tub of the washing machine is monitored in real time to replenish water in a timely manner. When controlling the inner tub to shake, the spin-drying control method also includes a step of returning to detect the water level in the inner tub; if the water level H is less than or equal to the first preset water level h, then the process returns to the step of controlling the water inlet valve to open.
[0074] In some embodiments, before controlling the rotation speed of the inner tub to increase to the first rotation speed, the method further includes: detecting the water level H in the inner tub; if the water level H is less than the second preset water level A, then controlling the rotation speed of the inner tub to increase to the second rotation speed, the second rotation speed being less than the first rotation speed.
[0075] Because the dehydration valve is open before the inner tub's rotation speed is increased to the first speed, the water level H in the inner tub continuously decreases. Once the water level H in the inner tub falls below the second preset water level A, the motor is activated, causing the inner tub to rotate at the second speed.
[0076] When the inner tub rotates at the second speed, the water remaining in the inner tub can provide a certain damping force to improve the anti-eccentricity ability; at the same time, it can solve the problem of clothes being affected by the water flow from the drain valve, causing the clothes to lean to the drain outlet side.
[0077] The spin-drying control method, after detecting the water level in the inner tub, further includes: if the water level H is less than the third preset water level B, and the third preset water level B is less than the second preset water level A, then the duration T3 of the inner tub rotating at the second speed is calculated; if the duration T3 is greater than the third preset duration t3, then the rotation speed of the inner tub is increased to the first speed. It can be understood that starting the inner tub at a low speed (second speed) in advance allows for the early discharge of a large amount of water, preventing water from remaining during spin-drying when the speed is increased to the first speed, thus reducing noise.
[0078] This application also provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform the dehydration control method described above.
[0079] It should be noted that, for the dehydration control method of the embodiments of this application, those skilled in the art will understand that all or part of the process of the dehydration control method of the embodiments of this application can be implemented by controlling related hardware through a computer program. The computer program can be stored in a computer-readable storage medium, such as a memory, and executed by at least one processor. During execution, it can include the process of the embodiments of the dehydration control method. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), etc. The dehydration control method, device, storage medium, and washing machine 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 its core ideas. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
[0080] This application provides a washing machine, which includes an inner tub, a motor, a drain valve, a drum-slamming switch, a memory, and a processor. The processor executes the above-mentioned spin-drying control method by calling a computer program stored in the memory.
[0081] Memory can be used to store applications and data. The applications stored in memory contain executable code, and applications can be composed of various functional modules.
[0082] The processor performs various functional applications and data processing by running applications stored in memory, thereby providing overall monitoring of the washing machine. In this embodiment, the processor in the washing machine loads the executable code corresponding to one or more application processes into memory according to the following instructions, and then runs the applications stored in memory to perform the following operations:
[0083] S1: Obtain dehydration command;
[0084] S2: Open the drain valve;
[0085] S3: Control the inner tub's rotation speed to increase to the first rotation speed;
[0086] S4: Adjust the barrel-banging switch to the first sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open;
[0087] S5: If so, the motor will be powered off, and the inner tub will be automatically started, water will be added to correct the deviation, or the inner tub will be stopped from rotating.
[0088] S6: If not, adjust the barrel-banging switch to the second sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open;
[0089] S7: If so, replenish water to correct the deviation of the inner tub or control the inner tub to stop rotating;
[0090] S8: If not, control the inner tub to maintain the first rotation speed for dehydration.
[0091] In one implementation, for the self-starting of the inner bucket in step S5, the processor also executes:
[0092] Control the drain valve to close;
[0093] Calculate the first power outage duration of the motor;
[0094] If the first power outage duration exceeds the first preset duration, the drain valve is opened and the process returns to step S3 to automatically start the inner tub.
[0095] In one implementation, after the motor is powered off in step S5, the processor further executes:
[0096] Count the number of times the motor was powered off, and denote the number as M;
[0097] When M is greater than or equal to the first preset number of times, the inner tub is replenished with water to correct its deviation or the inner tub is controlled to stop rotating.
[0098] When M is less than the first preset number of times, the inner bucket will start automatically.
[0099] In some embodiments, when the inner tub is replenished with water to correct its alignment or when the inner tub is stopped rotating, the processor executes:
[0100] Calculate the number of corrections to the inner tub. The number of corrections includes a first value, which is the ratio of M to a first preset number of corrections.
[0101] When the number of correction attempts is greater than or equal to the second preset number, the inner tub will stop rotating and an alarm will sound.
[0102] If the number of correction attempts is less than the second preset number, the inner tank will be replenished with water for correction.
[0103] In some embodiments, during step S6: replenishing water to correct the inner tub's alignment or controlling the inner tub to stop rotating, the processor also executes:
[0104] Control the motor to shut off and close the drain valve;
[0105] Count the number of times the motor was powered off, and denote the number as N;
[0106] Calculate the number of corrections required for the inner tub. The number of corrections includes a second value, which is N.
[0107] When the number of correction attempts is greater than or equal to the second preset number, the inner tub will stop rotating and an alarm will sound.
[0108] If the number of correction attempts is less than the second preset number, the inner tank will be replenished with water for correction.
[0109] In some embodiments, the washing machine includes a water inlet valve, and during the water replenishment and correction process, the processor also performs:
[0110] Control the opening of the inlet valve;
[0111] Check the water level inside the inner tank;
[0112] If the water level is higher than the first preset water level, the inlet valve will be closed.
[0113] Control the shaking of the inner tub and calculate the duration of the shaking;
[0114] If the duration exceeds the second preset duration, return to step S1.
[0115] In some embodiments, when controlling the inner tub to shake, the method further includes returning to the step of detecting the water level in the inner tub; if the water level is less than or equal to a first preset water level, the method returns to the step of controlling the water inlet valve to open.
[0116] In some embodiments, before controlling the inner tub's rotation speed to increase to a first rotation speed, the processor also performs:
[0117] Check the water level inside the inner tank;
[0118] If the water level is lower than the second preset water level, the rotation speed of the inner tank will be increased to the second rotation speed, which is lower than the first rotation speed.
[0119] In some embodiments, after detecting the water level in the inner tank, the processor also performs:
[0120] If the water level is lower than the third preset water level, and the third preset water level is lower than the second preset water level, then calculate the duration of the inner tub rotating at the second speed.
[0121] If the duration exceeds the third preset duration, the rotation speed of the inner tub will be increased to the first rotation speed.
[0122] This application provides a spin-drying control method and a washing machine. The spin-drying control method is applied to a washing machine, which includes an inner tub, a motor, a drain valve, and a drum-stopping switch. The motor drives the inner tub to rotate, and the drain valve is connected to the inner tub to drain water. The first sensitivity range of the drum-stopping switch is lower than the second sensitivity range of the drum-stopping switch. The spin-drying control method includes: receiving a spin-drying command and starting the program; opening the drain valve to prepare for drainage; increasing the inner tub speed to a preset first speed; activating the first drum-stopping switch to a closed state and monitoring whether it is opened by a knock. If it is opened, it is determined to be a small eccentricity state, and measures such as self-starting, water replenishment and correction, or stopping the rotation of the inner tub are taken. If the first drum-stopping switch remains closed, the second drum-stopping switch is also closed, and its state is monitored. If the second drum-stopping switch is opened by a knock, it is determined to be a large eccentricity state, and operations such as water replenishment and correction or stopping the rotation of the inner tub are performed. If the drum-stopping switch is not opened during the above process, the inner tub maintains the first speed and continues to spin-dry. This dehydration control method can not only effectively monitor the eccentricity of the inner drum, but also take timely corrective measures to ensure the stability of the dehydration process.
[0123] 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.
[0124] 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.
[0125] The dehydration control method and washing machine 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, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A dehydration control method, characterized in that, The washing machine includes an inner tub, a motor, a drain valve, and a drum-collision switch. The motor is connected to the inner tub to drive it to rotate. The drain valve is connected to the inner tub. The drum-collision switch has a first sensitivity range and a second sensitivity range, wherein the first sensitivity range is lower than the second sensitivity range. The spin-drying control method includes: S1: Obtain dehydration command; S2: Open the drain valve; S3: Control the rotation speed of the inner barrel to increase to the first rotation speed; S4: When the inner tub is at the first rotation speed, adjust the impact switch to the first sensitivity range, control the impact switch to be in the closed state, and monitor whether the impact switch is knocked open; S5: If so, the motor is de-energized, and the number of times the motor is de-energized is calculated, denoted as M; When M is less than the first preset number of times, the inner tub is automatically started. During the automatic start-up process, the speed of the inner tub first decreases and then increases, and inertia is used to correct the deviation. When M is greater than or equal to a first preset number of times, the number of times to correct the deviation of the inner tub is calculated. The number of times to correct the deviation includes a first value, which is the ratio of M to the first preset number of times. When the number of corrections is greater than or equal to the second preset number, the inner tub is controlled to stop rotating and an alarm is triggered; When the number of correction attempts is less than the second preset number, the inner tank is replenished with water for correction. S6: If not, adjust the barrel-banging switch to the second sensitivity range, control the barrel-banging switch to the closed state, and monitor whether the barrel-banging switch is knocked open; S7: If so, then add water to the inner tub to correct its deviation or control the inner tub to stop rotating; S8: If not, control the inner tub to maintain the first rotation speed for dehydration.
2. The dehydration control method according to claim 1, characterized in that, For step S5, the self-starting of the inner bucket includes: Control the drain valve to close; Calculate the first power-off duration of the motor; If the first power outage duration exceeds the first preset duration, the drain valve is opened and the process returns to step S3 to automatically start the inner tub.
3. The dehydration control method according to claim 1, characterized in that, For step S6: replenishing water to correct the deviation of the inner tub or controlling the inner tub to stop rotating, the following are included: Control the motor to be powered off and the drain valve to be closed; Calculate the number of times the motor was powered off, and denote the number as N; Calculate the number of corrections required for the inner tub, where the number of corrections includes a second value, N. When the number of corrections is greater than or equal to the second preset number, the inner tub is controlled to stop rotating and an alarm is triggered; When the number of correction attempts is less than the second preset number, the inner tank is replenished with water for correction.
4. The dehydration control method according to any one of claims 1 to 3, characterized in that, The washing machine includes a water inlet valve, and the water replenishment and correction includes: Control the opening of the water inlet valve; Detect the water level inside the inner tank; If the water level is higher than the first preset water level, then the inlet valve is closed; Controlling the shaking of the inner tub and calculating the duration of the shaking of the inner tub; If the duration is greater than the second preset duration, return to step S1.
5. The dehydration control method according to claim 4, characterized in that, When controlling the inner tub to shake, the method also includes a step of returning to detect the water level in the inner tub; if the water level is less than or equal to the first preset water level, the method returns to the step of controlling the water inlet valve to open.
6. The dehydration control method according to any one of claims 1 to 3, characterized in that, Before controlling the rotational speed of the inner tub to increase to the first rotational speed, the method further includes: Detect the water level inside the inner tank; If the water level is lower than the second preset water level, the rotation speed of the inner tank is controlled to be increased to the second rotation speed, which is lower than the first rotation speed.
7. The dehydration control method according to claim 6, characterized in that, After detecting the water level inside the inner tank, the process also includes: If the water level is lower than the third preset water level, and the third preset water level is lower than the second preset water level, then calculate the duration of the inner tub rotating at the second rotation speed; If the duration is greater than the third preset duration, the rotation speed of the inner tub is controlled to be increased to the first rotation speed.
8. A washing machine, characterized in that, It includes an inner tub, a motor, a drain valve, a drum-bumping switch, a memory, and a processor, wherein the processor executes the dehydration control method as described in any one of claims 1 to 7 by calling a computer program stored in the memory.