Washing machine and spin control method thereof

Abstract

The application provides a washing machine and a dehydration control method thereof. The dehydration tub of the washing machine has an inner tub and an outer tub. The inner tub has a first rotating speed stage and a second rotating speed stage during dehydration. The rotating speed of the first rotating speed stage is less than that of the second rotating speed stage. The washing machine dehydration control method comprises the following steps: in response to a dehydration instruction, the inner tub is controlled to rotate for dehydration; in the first rotating speed stage, the eccentricity of the load distribution in the inner tub is determined according to the displacement of the outer tub; the target rotating speed of the inner tub and the upper limit value of the vibration of the outer tub in the second rotating speed stage are determined according to the eccentricity; and the rotating speed of the dehydration tub is controlled according to the target rotating speed of the inner tub and the upper limit value of the vibration of the outer tub, so as to reduce the noise generated during the dehydration of the washing machine. The application provides a washing machine dehydration control method capable of reducing the noise during dehydration.

Description

Technical Field

[0001] The present application relates to the technical field of washing machine control, and in particular to a washing machine and a washing machine dehydration control method. Background Art

[0002] During the spin cycle, a washing machine's eccentricity needs to be detected. Existing algorithms for detecting eccentricity primarily rely on fluctuations in motor speed, with detection speeds ranging from 90 to 140 rpm. However, at low speeds, complex loads present significant challenges when detecting eccentricity. Using motor speed as a tool for eccentricity detection can lead to significant deviations, which in turn can result in loud vibrations and noise during spin cycles.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0004] One purpose of this application is to provide some low-noise dehydration washing machines.

[0005] Another object of the present application is to provide a washing machine dehydration control method that can reduce noise during dehydration.

[0006] To solve the above technical problems, this application adopts the following technical solutions:

[0007] According to one aspect of the present application, the present application provides a dehydration control method for a washing machine, wherein the dehydration barrel of the washing machine has an inner barrel and an outer barrel; the inner barrel has a first speed stage and a second speed stage during dehydration, and the speed of the first speed stage is less than the speed of the second speed stage. The method includes: responding to a dehydration instruction, controlling the inner barrel to rotate and dehydrate; in the first speed stage, determining the eccentricity of the load distribution in the inner barrel according to the displacement of the outer barrel; determining the target speed of the inner barrel in the second speed stage and the upper limit of the vibration of the outer barrel according to the eccentricity; controlling the speed of the dehydration barrel according to the target speed of the inner barrel and the upper limit of the vibration of the outer barrel to reduce the noise generated when the washing machine dehydrates.

[0008] In some embodiments, the vibration upper limit value includes the vibration acceleration upper limit value; the speed of the dehydration barrel is controlled according to the target speed of the inner barrel and the vibration upper limit value of the outer barrel, including: controlling the speed increase of the inner barrel according to the determined target speed; monitoring the vibration acceleration of the outer barrel during the speed increase process of the inner barrel; when the vibration acceleration of the outer barrel reaches the vibration acceleration upper limit value, performing a first deceleration processing process on the inner barrel to control the vibration acceleration of the outer barrel within the vibration acceleration upper limit value.

[0009] In some embodiments, after monitoring the vibration acceleration of the outer barrel, the method further includes: controlling the inner barrel to continue to increase its speed until the determined target speed is reached when the vibration acceleration of the outer barrel does not exceed the upper limit of the vibration acceleration; and controlling the inner barrel to rotate at the target speed until the dehydration stop condition is met.

[0010] In some embodiments, the eccentricity of the load distribution in the inner barrel is determined based on the displacement of the outer barrel, including: determining the eccentricity level of the load distribution in the inner barrel based on the displacement of the outer barrel; a first speed reduction processing process includes: reducing the rotation speed of the inner barrel to a target rotation speed corresponding to the next eccentricity level; monitoring the vibration acceleration of the outer barrel; if the vibration acceleration of the outer barrel still exceeds the upper limit of the vibration acceleration, continuing to reduce the rotation speed of the inner barrel until the vibration acceleration of the outer barrel is within the vibration acceleration limit.

[0011] In some embodiments, the first speed reduction processing process includes: reducing the rotational speed of the inner barrel; detecting the vibration acceleration of the outer barrel during the speed reduction process of the inner barrel; stopping reducing the rotational speed of the inner barrel when the vibration acceleration of the outer barrel is lower than the vibration acceleration limit; controlling the inner barrel to rotate at a speed corresponding to when the vibration acceleration is lower than the vibration acceleration limit until the dehydration stop condition is met.

[0012] In some embodiments, in the first speed stage, before determining the eccentricity of the load distribution in the inner barrel based on the displacement of the outer barrel, the method also includes: obtaining the displacement of the outer barrel; when the displacement exceeds the set displacement range, performing a second speed reduction processing on the inner barrel to adjust the load distribution in the inner barrel after speed reduction.

[0013] In some embodiments, the second speed reduction process includes: reducing the rotation speed of the inner barrel to within a set shaking speed range; and performing shaking processing on the load in the inner barrel.

[0014] In some embodiments, the method further includes: recording the number of times the shaking process is performed; and controlling the washing machine to stop dehydration after the number of times the load in the inner barrel is shaken reaches a preset threshold.

[0015] According to another aspect of the present application, a washing machine is also provided, including: a housing; a dehydration barrel, the dehydration barrel being fixed in the housing, the dehydration barrel including an inner barrel and an outer barrel, the outer barrel being sleeved on the inner barrel; a displacement sensor being arranged on the outer barrel; a controller, the controller being electrically connected to the displacement sensor and the inner barrel, and being used to determine the eccentricity of the load distribution in the inner barrel according to the displacement of the outer barrel; determining the target speed of the inner barrel according to the corresponding relationship between the eccentricity and the target speed; and controlling the speed of the dehydration barrel according to the target speed of the inner barrel and the vibration limit of the outer barrel, so as to reduce the noise generated when the washing machine dehydrates.

[0016] In some embodiments, the washing machine also includes an acceleration sensor, which is arranged on the outer barrel for monitoring the vibration acceleration of the outer barrel; the controller is used to control the rotation of the inner barrel according to the monitoring results of the acceleration sensor to reduce noise during the dehydration process.

[0017] It can be seen from the above technical solution that the beneficial effects of this application are:

[0018] In this application, in the first, lower speed stage, the eccentricity of the inner tub load is intuitively and accurately determined by the displacement of the outer tub. Based on the eccentricity, the speed for the second, higher speed stage and the outer tub's upper vibration limit are set. This upper vibration limit and target speed are used to achieve comprehensive control of the dehydration process, ensuring smooth dehydration while reducing noise during the dehydration process.

[0019] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0021] Figure 1 is a structural diagram of a washing machine according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of a washing machine dehydration control method provided according to an embodiment of the present application;

[0023] Figure 3 is based on Figure 2 Step S170 is a flowchart of a washing machine dehydration control method provided in an embodiment;

[0024] Figure 4 This is a flowchart of an embodiment of the first speed reduction process in this application;

[0025] Figure 5 is a flowchart of another embodiment of the first speed reduction process in the present application;

[0026] Figure 6 This is a flowchart of another embodiment of the first speed reduction process in this application. DETAILED DESCRIPTION

[0027] Although the present application can be easily embodied in different forms of embodiments, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the application and is not intended to limit the application to what is described herein.

[0028] Thus, a feature indicated in this specification will be used to illustrate one of the features of one embodiment of the present application, rather than implying that each embodiment of the present application must have the described feature. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other, not explicitly described, combinations. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0029] In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of various components of the present application are not absolute but relative. These descriptions are applicable when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components are changed, the directional indications will also change accordingly.

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this application will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. Identical reference numerals in the figures indicate identical or similar parts, and thus repeated descriptions thereof will be omitted.

[0031] The preferred embodiments of the present application are further described in detail below in conjunction with the drawings of this specification.

[0032] First, the structure of the washing machine in this application is introduced.

[0033] Figure 1 Schematic diagram of the structure of a washing machine according to an embodiment of the present application. Figure 1 As shown, the washing machine at least includes a door seal 10, a motor transmission assembly 20, an outer tub 30, an inner tub 40, a housing 50, a sensor 60, an elastic connector 70, a motor 80, and a shock-absorbing connector 90.

[0034] The dehydration barrel includes an outer barrel 30 and an inner barrel 40, and the inner barrel 40 is rotatably fixed in the outer barrel 30. The door seal 10 is pivotally arranged on the box body 50 for opening or closing the inner barrel 40.

[0035] The outer tub 30 is secured within the washing machine's cabinet 50 via a shock-absorbing connector 90 and an elastic connector 70. The shock-absorbing connector 90 provides support for the outer tub 30 and mitigates vibrations of the outer tub 30 through mechanical damping, thereby reducing vibrations transmitted from the outer tub 30 to the cabinet 50. The elastic connector 70, which can be a suspension spring, also provides both shock absorption and securing. Multiple shock-absorbing connectors 90 and elastic connectors 70 can be used to provide multiple points of support for the outer tub 30 and reduce vibrations transmitted from the outer tub 30 to the cabinet 50.

[0036] The sensor 60 is provided on the outer tub 30 and is used to detect parameters of the outer tub such as vibration displacement and vibration acceleration. The sensor 60 is connected to the controller of the washing machine and is used to transmit the detected parameters to the controller.

[0037] During the dehydration process, the washing machine's controller sends a dehydration command to the motor drive unit, which drives the motor 80 to rotate. The motor 80, through the motor transmission assembly 20, drives the inner tub 40 to rotate. The inner tub 40 has small holes spaced at intervals. As the inner tub 40 rotates, centrifugal force is generated by the clothes in the inner tub 40. Under the action of the centrifugal force, the water in the clothes is ejected through the small holes, thereby achieving the purpose of dehydrating the clothes.

[0038] It is easy to understand that the magnitude of the centrifugal force is related to the rotation speed of the inner tub and the weight distribution of the clothes in the inner tub. When the clothes in the inner tub are not evenly distributed along the inner tub wall, the centrifugal force in the circumference of the inner tub will be inconsistent.

[0039] The present application controls the dehydration of the dehydration barrel by using parameters such as vibration and displacement detected by sensors installed in the outer barrel, with the aim of reducing the noise generated when the washing machine is dehydrating.

[0040] Figure 2 This is a flow chart of a washing machine dehydration control method according to an embodiment of the present application. Figure 2 As shown, in this embodiment, the washing machine dehydration control method can be specifically executed by a controller of the washing machine, and the method at least includes the following steps S110 to S170.

[0041] Step S110: In response to the dehydration instruction, the inner tub is controlled to rotate and dehydrate.

[0042] The dehydration command can be issued by the user after triggering the designated dehydration button, or it can be automatically triggered during a series of clothing cleaning processes.

[0043] After the controller of the washing machine issues a dehydration instruction, the washing machine controls the motor driving device to drive the inner tub to rotate to achieve dehydration.

[0044] Step S130: In the first speed stage, the eccentricity of the load distribution in the inner tub is determined according to the displacement of the outer tub.

[0045] During dehydration, the inner tub has a first speed stage and a second speed stage. The speed in the first speed stage is lower than that in the second speed stage. Specifically, the first and second speed stages can be distinguished by a set speed threshold. For example, a speed below the threshold is the first speed stage, and a speed above the threshold is the second speed stage.

[0046] When the inner tub rotates, if the load of clothes in the inner tub is unevenly distributed, the rotation of the inner tub may cause the outer tub to move due to the centrifugal force.

[0047] The displacement of the outer barrel can be detected by a sensor arranged on the outer barrel.

[0048] The present application determines the eccentricity of the load distribution in the inner barrel by detecting the displacement of the outer barrel, so that it can more intuitively know whether the eccentricity of the load distribution in the inner barrel causes the displacement of the outer barrel, and if so, the magnitude of the displacement.

[0049] The corresponding relationship between the displacement of the outer barrel and the eccentricity of the load distribution in the inner barrel can be obtained through multiple tests, so that the eccentricity of the load distribution in the inner barrel can be determined according to the displacement of the outer barrel.

[0050] The eccentricity is the mass of the eccentric mass, which is the "extra" mass of the rotor during rotation. In other words, the eccentricity is the eccentric mass caused by the uneven distribution of clothes in the washing machine.

[0051] Step S150: Determine the target rotation speed of the inner tub and the upper limit of vibration of the outer tub in the second rotation speed stage according to the eccentricity.

[0052] The target speed is the speed at which the inner drum rotates steadily for dehydration. It is easy to understand that the magnitude of the centrifugal force of the eccentric mass is related to the speed and the eccentricity.

[0053] In some embodiments, the target rotation speed corresponding to different eccentricities can be determined through multiple experiments, so that the noise generated by the rotation of the clothing load with the eccentricity at the target rotation speed is controlled within a set range.

[0054] In another embodiment, a washing machine rotation model may be established to calculate the target speed of the tub in the second speed stage according to different eccentricities, so as to minimize noise without affecting the dehydration performance.

[0055] The outer tub's upper vibration limit is the maximum allowable vibration level. This limit is dependent on variables such as the distance between the outer tub and the housing and the damping parameters of the connectors connecting the outer tub and the housing. In one embodiment, when the eccentricity is large, a larger upper vibration limit can be set within a safe range to ensure dehydration while ensuring safety. When the eccentricity is small, a smaller upper vibration limit can be set within a safe range to reduce dehydration noise.

[0056] Step S170: controlling the rotation speed of the dehydration tub according to the target rotation speed of the inner tub and the upper limit of vibration of the outer tub to reduce the noise generated when the washing machine is dehydrating.

[0057] As previously mentioned, the centrifugal force of the eccentric mass is related to the rotational speed and the amount of eccentricity. Therefore, given a known amount of eccentricity, the centrifugal force of the eccentric load can be controlled by the target rotational speed of the inner drum, preventing excessive vibration and noise from the eccentric load. As will be readily understood, a lower target rotational speed can be set for larger eccentricities. Furthermore, the vibration of the outer drum is simultaneously controlled by the outer drum's upper vibration limit, preventing excessive vibration from generating excessive noise and potentially causing safety accidents.

[0058] As a result, in the first, lower speed stage, the eccentricity of the inner tub load can be intuitively and accurately determined through the displacement of the outer tub. Furthermore, the speed in the second speed stage and the outer tub's upper vibration limit are set based on the eccentricity. This vibration limit and target speed allow for comprehensive control of the spin process, ensuring smooth spin completion while reducing noise during the process.

[0059] Figure 3 is based on Figure 2 A flowchart of a washing machine dehydration control method according to an embodiment of step S170 is provided. In this embodiment, the upper limit of vibration includes an upper limit of vibration acceleration. Step S170 controls the speed of the dehydration tub based on the target speed of the inner tub and the upper limit of vibration of the outer tub. Specifically, the steps S171, S173, and S175 may be included.

[0060] Step S171, controlling the inner tub to increase speed according to the determined target speed;

[0061] Step S173, monitoring the vibration acceleration of the outer tub during the acceleration of the inner tub;

[0062] Step S175: When the vibration acceleration of the outer tub reaches the upper limit of the vibration acceleration, a first deceleration process is performed on the inner tub to control the vibration acceleration of the outer tub within the upper limit of the vibration acceleration.

[0063] Specifically, the magnitude of the vibration noise can be reflected by the vibration acceleration. The greater the vibration acceleration, the greater the vibration noise.

[0064] The acceleration of the outer tub can be intuitively and conveniently obtained through an accelerometer installed on the outer tub. For example, the accelerometer can be a three-dimensional accelerometer that detects the acceleration of the outer tub along the X, Y, and Z axes. The acceleration along the axis with the largest value is compared with the upper limit of vibration acceleration to determine whether the acceleration limit is exceeded.

[0065] The first deceleration processing process is used to decelerate the inner tub when the vibration acceleration of the outer tub reaches the upper limit of the vibration acceleration, so as to control the vibration acceleration of the outer tub within the upper limit of the vibration acceleration.

[0066] In some embodiments, after monitoring the vibration acceleration of the outer tub, the washing machine dehydration control method also includes the following steps: when the vibration acceleration of the outer tub does not exceed the upper limit of the vibration acceleration, controlling the inner tub to continue to increase the speed until the determined target speed is reached; controlling the inner tub to rotate at the target speed until the dehydration stop condition is met.

[0067] In this way, the vibration noise can be controlled by the upper limit value of the vibration acceleration to prevent the dehydration noise from being too loud.

[0068] The first speed reduction process can be a step-by-step speed reduction, a flexible speed reduction or other speed reduction methods. The first speed reduction process will be described in detail below with multiple embodiments.

[0069] Figure 4 This is a flow chart of an embodiment of the first speed reduction process in this application. Figure 4 As shown, the first speed reduction process may specifically include steps S410 to S420:

[0070] Step S410: reducing the rotation speed of the inner tub to a target rotation speed corresponding to the next eccentricity level; monitoring the vibration acceleration of the outer tub;

[0071] In step S420, if the vibration acceleration of the outer tub still exceeds the upper limit of the vibration acceleration, the rotation speed of the inner tub is further reduced until the vibration acceleration of the outer tub is within the vibration acceleration limit.

[0072] Specifically, determining the eccentricity of the load distribution in the inner barrel according to the displacement of the outer barrel specifically includes: determining the eccentricity level of the load distribution in the inner barrel according to the displacement of the outer barrel.

[0073] The load distribution in the inner drum can have multiple eccentricity levels, and each eccentricity level corresponds to a target speed, thereby reducing the control complexity of the washing machine and improving the control reliability.

[0074] If the outer tub's vibration acceleration reaches the upper limit, the inner tub's rotation speed is reduced to the target speed corresponding to the next eccentricity level, and the outer tub's vibration acceleration is retested. If it is within the upper limit, the spin cycle continues at the target speed, which is one level lower, until the spin cycle is complete. If the outer tub's vibration acceleration still exceeds the upper limit, the target speed corresponding to the next eccentricity level is further reduced until the outer tub's vibration acceleration is within the upper limit.

[0075] In one embodiment, in order to ensure the dehydration performance, a lower limit of the dehydration speed can be set. When the speed of the inner drum drops below the lower limit of the dehydration speed, dehydration is stopped, and a prompt for redistributing the clothing load is issued or the operating steps for redistributing the clothing load are executed.

[0076] Figure 5 This is a flow chart of another embodiment of the first speed reduction process in this application. Figure 5 As shown, the first speed reduction process may specifically include the following steps:

[0077] Step S501: If the determined eccentricity level is the first eccentricity level, dehydration is performed at the first target speed in the second speed stage;

[0078] Step S502: During the dehydration process, detect whether the vibration acceleration of the outer tub exceeds the set vibration acceleration upper limit A1; if not, execute step S503; if so, execute step S504;

[0079] Step S503, dehydrating at a first target speed;

[0080] Step S504, reducing the rotation speed of the inner drum to a second target rotation speed;

[0081] Step S505: During the dehydration process, detect whether the vibration acceleration of the outer tub exceeds the set vibration acceleration upper limit A2; if not, execute step S506; if so, execute step S507;

[0082] Step S506, dehydrating at a second target speed;

[0083] Step S507, reducing the rotation speed of the inner tub to a third target rotation speed;

[0084] Step S508: During the dehydration process, detect whether the vibration acceleration of the outer tub exceeds the set vibration acceleration upper limit A3; if not, execute step S509; if so, execute step S510;

[0085] Step S509, dehydrating at a third target speed;

[0086] Step S510, the rotation speed of the inner tub is reduced to a fourth target rotation speed;

[0087] Step S511, during the spin-drying process, it is detected whether the vibration acceleration of the outer tub exceeds a set vibration acceleration upper limit value A4; if not, step S512 is executed, and if yes, step S513 is executed;

[0088] Step S512, spin-drying at the fourth target rotation speed;

[0089] Step S513, vibration over-limit alarm.

[0090] Specifically, the vibration over-limit alarm can be used to prompt the user to redistribute the laundry load.

[0091] Specifically, at least four eccentricity levels can be set. Illustratively, when the eccentricity is less than 300g, it can be set as the first eccentricity level, when the eccentricity is not less than 300g and not more than 500g, it is the second eccentricity level, when the eccentricity is not less than 500g and not more than 700g, it is the third eccentricity level, and when the eccentricity is not less than 700g and not more than 1000g, it is the fourth eccentricity level. When the eccentricity exceeds 1000g, a prompt to redistribute the laundry load is issued or an operation step of redistributing the laundry load is executed.

[0092] The vibration acceleration upper limit values corresponding to the first to fourth eccentricity levels are set as A1, A2, A3 and A4 respectively. And the first target rotation speed corresponding to the first eccentricity level can be any value in 1200-1400rpm (revolutions per minute), the second target rotation speed corresponding to the second eccentricity level can be any value in 1000-1200rpm, the third target rotation speed corresponding to the third eccentricity level can be any value in 800-1000rpm, and the fourth target rotation speed corresponding to the fourth eccentricity level can be any value in 700-800rpm. The specific rotation speed values can also be determined by those skilled in the art according to the actual situation of the washing machine.

[0093] It should be noted that the target rotation speed is determined according to the eccentricity level. Illustratively, if the determined eccentricity level is the second eccentricity level, the inner tub is first controlled to rotate at the second target rotation speed, and then the rotation speed is controlled by the vibration acceleration. Thus, in the case that the vibration acceleration of the outer tub reaches the vibration acceleration upper limit value, the rotation speed of the inner tub is reduced to the target rotation speed corresponding to the next eccentricity level, so that the spin-drying process is controlled by the speed reduction and the vibration acceleration, and the noise during the spin-drying process is reduced.

[0094] Figure 6 is a flowchart of a first speed reduction process in the present application. As shown in Figure 6 , in this embodiment, the first speed reduction process includes the following steps:

[0095] Step S610, reducing the rotation speed of the inner barrel;

[0096] Step S620: Detecting the vibration acceleration of the outer tub while the rotation speed of the inner tub is decreasing;

[0097] Step S630: When the vibration acceleration of the outer tub is lower than the vibration acceleration limit, stop reducing the rotation speed of the inner tub;

[0098] Step S640: Control the inner tub to rotate at a speed corresponding to when the vibration acceleration is lower than the vibration acceleration limit value until the dehydration stop condition is met.

[0099] Specifically, after the target speed is set by the eccentricity, if the eccentricity is not detected accurately, the vibration acceleration of the inner barrel during the rotation at the target speed will be too large or too small.

[0100] If the vibration acceleration of the outer drum exceeds the vibration acceleration limit while the inner drum is rotating at the target speed, the inner drum's speed is reduced. A flexible speed reduction method can be employed. For example, the speed is reduced by a fixed differential value, which can be set anywhere from 50 rpm to 100 rpm. The specific differential value can be flexibly set based on actual conditions.

[0101] When the vibration acceleration of the outer tub is lower than the vibration acceleration limit, the speed reduction of the inner tub is stopped. In this way, the vibration noise can be controlled within a certain range while ensuring the dehydration performance.

[0102] In some embodiments, before step S130, in the first speed stage, before determining the eccentricity of the load distribution in the inner barrel based on the displacement of the outer barrel, the washing machine dehydration control method may further include the following steps: obtaining the displacement of the outer barrel; when the displacement exceeds the set displacement range, performing a second speed reduction process on the inner barrel to adjust the load distribution in the inner barrel after speed reduction.

[0103] Specifically, the displacement of the outer barrel in multiple axes can be obtained at preset time intervals, and the displacement of multiple axes can be compared with the set displacement range corresponding to the axis. When the displacement exceeds the set displacement range, the inner barrel is subjected to a second deceleration process to adjust the load distribution in the inner barrel after deceleration.

[0104] In some embodiments, the second deceleration process may specifically include reducing the inner tub speed to within a set dehydration speed range and dehydrating the load within the inner tub. For example, the inner tub speed may be reduced to zero. The inner tub is then rotated two times forward and two times reverse, and after a set number of cycles, the speed is increased again to restart the dehydration process.

[0105] In some embodiments, the dehydration control method for a washing machine further includes: recording the number of times the shaking process is performed; and controlling the washing machine to stop dehydration when the number of times the load in the inner tub is shaken reaches a preset threshold. This can prevent the dehydration time from being too long.

[0106] According to another aspect of the present application, a washing machine is provided, comprising at least a housing, a spin tub, a displacement sensor, and a controller. The spin tub is secured within the housing and comprises an inner tub and an outer tub, the outer tub being mounted over the inner tub. The displacement sensor is disposed on the outer tub. The controller is electrically connected to the displacement sensor and the inner tub and is configured to determine the eccentricity of the load distribution within the inner tub based on the displacement of the outer tub; determine a target rotational speed for the inner tub based on a correspondence between the eccentricity and the target rotational speed; and control the rotational speed of the spin tub based on the target rotational speed of the inner tub and a vibration limit of the outer tub to reduce noise generated during dehydration.

[0107] In some embodiments, the washing machine also includes an acceleration sensor, which is arranged on the outer barrel for monitoring the vibration acceleration of the outer barrel; the controller is used to control the rotation of the inner barrel according to the monitoring results of the acceleration sensor to reduce noise during the dehydration process.

[0108] The inventive concept of the above washing machine is consistent with the inventive concept of the above washing machine dehydration control method, and will not be repeated here.

[0109] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present application can be embodied in various forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A washing machine dehydration control method, characterized in that: The washing machine has a dehydration barrel having an inner barrel and an outer barrel; the inner barrel has a first speed stage and a second speed stage during dehydration, the speed of the first speed stage being lower than the speed of the second speed stage, and the method includes: In response to a dehydration instruction, controlling the inner tub to rotate and dehydrate; In the first speed stage, determining the eccentricity level of the load distribution in the inner barrel according to the displacement of the outer barrel; determining, according to the eccentricity level, a target speed of the inner tub and an upper limit of vibration of the outer tub in the second speed stage, wherein the upper limit of vibration includes an upper limit of vibration acceleration; controlling the inner tub to increase its speed according to the determined target speed; monitoring the vibration acceleration of the outer tub during the inner tub's increasing speed; and performing a first speed reduction process on the inner tub when the vibration acceleration of the outer tub reaches the upper limit of the vibration acceleration to reduce noise generated during dehydration of the washing machine; The first speed reduction process includes: The rotational speed of the inner barrel is reduced to the target rotational speed corresponding to the next eccentricity level; the vibration acceleration of the outer barrel is monitored; if the vibration acceleration of the outer barrel still exceeds the upper limit of the vibration acceleration, the rotational speed of the inner barrel is further reduced until the vibration acceleration of the outer barrel is within the upper limit of the vibration acceleration.

2. The method according to claim 1, characterized in that After monitoring the vibration acceleration of the outer tub, the method further includes: When the vibration acceleration of the outer tub does not exceed the upper limit of the vibration acceleration, controlling the inner tub to continue to increase its speed until the determined target speed is reached; The inner tub is controlled to rotate at the target speed until a dehydration stop condition is met.

3. The method according to claim 1, characterized in that The first speed reduction process further includes: reducing the rotation speed of the inner barrel; detecting the vibration acceleration of the outer tub during the process of reducing the rotation speed of the inner tub; When the vibration acceleration of the outer tub is lower than the upper limit of the vibration acceleration, stopping reducing the rotation speed of the inner tub; The inner tub is controlled to rotate at a speed corresponding to when the vibration acceleration is lower than the upper limit of the vibration acceleration until a dehydration stop condition is met.

4. The method according to claim 1, wherein In the first speed stage, before determining the eccentricity level of the load distribution in the inner barrel according to the displacement of the outer barrel, the method further includes: Obtaining the displacement of the outer barrel; When the displacement exceeds the set displacement range, a second deceleration process is performed on the inner barrel to adjust the load distribution in the inner barrel after the deceleration.

5. The method according to claim 4, characterized in that The second speed reduction process includes: reducing the rotation speed of the inner barrel to within a set shaking speed range; The load in the inner barrel is shaken out.

6. The method according to claim 5, characterized in that The method further comprises: Record the number of times the jittering process is performed; After the number of times the load in the inner tub is shaken out reaches a preset threshold, the washing machine is controlled to stop dehydration.

7. A washing machine, characterized in that: include: Box; a dehydration barrel fixed in the housing, comprising an inner barrel and an outer barrel, wherein the outer barrel is sleeved on the inner barrel, and the inner barrel has a first speed stage and a second speed stage during dehydration, wherein the speed of the first speed stage is lower than the speed of the second speed stage; A displacement sensor is provided on the outer barrel; a controller electrically connected to the displacement sensor and the inner tub, configured to determine, in the first speed stage, a level of eccentricity of the load distribution in the inner tub based on the displacement of the outer tub; and, based on the eccentricity level, determine, in the second speed stage, a target speed of the inner tub and an upper vibration limit of the outer tub, wherein the upper vibration limit includes an upper vibration acceleration limit; controlling the inner tub to increase its speed according to the determined target speed; monitoring the vibration acceleration of the outer tub during the inner tub's increasing speed; and performing a first speed reduction process on the inner tub when the vibration acceleration of the outer tub reaches the upper limit of the vibration acceleration to reduce noise generated during dehydration of the washing machine; The first speed reduction process includes: The rotational speed of the inner barrel is reduced to the target rotational speed corresponding to the next eccentricity level; the vibration acceleration of the outer barrel is monitored; if the vibration acceleration of the outer barrel still exceeds the upper limit of the vibration acceleration, the rotational speed of the inner barrel is further reduced until the vibration acceleration of the outer barrel is within the upper limit of the vibration acceleration.

8. The washing machine according to claim 7, characterized in that The washing machine also includes an acceleration sensor, which is arranged on the outer barrel and is used to monitor the vibration acceleration of the outer barrel; the controller is used to control the rotation of the inner barrel according to the monitoring results of the acceleration sensor to reduce noise during the dehydration process.

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