CN115538095A - Washing machine and dewatering control method thereof - Google Patents
Washing machine and dewatering control method thereof Download PDFInfo
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- CN115538095A CN115538095A CN202110651174.4A CN202110651174A CN115538095A CN 115538095 A CN115538095 A CN 115538095A CN 202110651174 A CN202110651174 A CN 202110651174A CN 115538095 A CN115538095 A CN 115538095A
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- 238000000034 method Methods 0.000 title claims abstract description 82
- 238000005406 washing Methods 0.000 title claims abstract description 60
- 230000018044 dehydration Effects 0.000 claims abstract description 63
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 63
- 238000006073 displacement reaction Methods 0.000 claims abstract description 46
- 230000004044 response Effects 0.000 claims abstract description 4
- 230000001133 acceleration Effects 0.000 claims description 113
- 230000008569 process Effects 0.000 claims description 42
- 230000009467 reduction Effects 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000011946 reduction process Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013017 mechanical damping Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/24—Spin speed; Drum movements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
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Abstract
The application provides a washing machine and a dehydration control method thereof, wherein a dehydration barrel of the washing machine is provided with an inner barrel and an outer barrel; the inner tub has a first rotation speed stage and a second rotation speed stage when dehydrating, the rotation speed of the first rotation speed stage is less than that of the second rotation speed stage, and the dehydration control method of the washing machine comprises the following steps: controlling the inner barrel to rotate for dehydration in response to a dehydration instruction; in the first rotating speed stage, determining the eccentric amount of the load distribution in the inner barrel according to the displacement amount of the outer barrel; determining a target rotating speed of the inner barrel in the second rotating speed stage and a vibration upper limit value of the outer barrel according to the eccentricity; and controlling the rotating speed of the dewatering barrel according to the target rotating speed of the inner barrel and the upper limit value of the vibration of the outer barrel so as to reduce the noise generated during dewatering of the washing machine. The application provides a washing machine dehydration control method capable of reducing noise during dehydration.
Description
Technical Field
The application relates to the technical field of washing machine control, in particular to a washing machine and a dewatering control method of the washing machine.
Background
In the dewatering process of the washing machine, the eccentricity condition of the washing machine needs to be detected, and the existing eccentricity detection algorithm of the washing machine mainly detects the eccentricity through the fluctuation of the rotating speed of a motor, wherein the detection speed is 90rpm-140rpm. However, when the eccentric detection speed of the washing machine is low, the detection difficulty of the complex eccentric condition of the clothes load is high, the eccentric detection by the motor speed method may have a large deviation, and the large deviation may cause a large dewatering vibration noise.
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 constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
It is an object of the present application to provide a number of low noise dehydration washing machines.
Another object of the present application is to provide a dehydration control method of a washing machine capable of reducing noise during dehydration.
In order to solve the technical problem, the following technical scheme is adopted in the application:
according to one aspect of the present application, there is provided a dehydration control method of a washing machine, the dehydration tub of the washing machine having an inner tub and an outer tub; the inner barrel has a first rotating speed stage and a second rotating speed stage when dewatering, the rotating speed of the first rotating speed stage is less than that of the second rotating speed stage, and the method comprises the following steps: controlling the inner barrel to rotate for dehydration in response to a dehydration instruction; in the first rotating speed stage, determining the eccentric amount of the load distribution in the inner barrel according to the displacement amount of the outer barrel; determining a target rotating speed of the inner barrel in the second rotating speed stage and a vibration upper limit value of the outer barrel according to the eccentricity; the rotating speed of the dewatering tub is controlled according to the target rotating speed of the inner tub and the upper limit value of vibration of the outer tub, so that noise generated during dewatering of the washing machine is reduced.
In some embodiments, the vibration upper limit value comprises a vibration acceleration upper limit value; the method for controlling the rotating speed of the dewatering barrel according to the target rotating speed of the inner barrel and the upper limit value of the vibration of the outer barrel comprises the following steps: controlling the inner barrel to increase the speed according to the determined target rotating speed; monitoring the vibration acceleration of the outer barrel in the acceleration process of the inner barrel; and under the condition that the vibration acceleration of the outer barrel reaches the upper limit value of the vibration acceleration, carrying out a first speed reduction processing process on the inner barrel so as to control the vibration acceleration of the outer barrel within the upper limit value of the vibration acceleration.
In some embodiments, after monitoring the vibration acceleration of the outer tub, the method further comprises: under the condition that the vibration acceleration of the outer barrel does not exceed the vibration acceleration upper limit value, controlling the inner barrel to continuously increase the speed until the determined target rotating speed is reached; controlling the inner barrel to rotate at the target rotating speed until the dehydration stopping condition is met.
In some embodiments, determining the eccentricity of the load distribution in the inner barrel according to the displacement of the outer barrel comprises: determining the eccentric magnitude grade of the load distribution in the inner barrel according to the displacement of the outer barrel; a first derating process comprising: reducing the rotating speed of the inner barrel to a target rotating speed corresponding to the next eccentric magnitude grade; monitoring the vibration acceleration of the outer barrel; if the vibration acceleration of the outer barrel still exceeds the upper limit value of the vibration acceleration, the rotating speed of the inner barrel is continuously reduced until the vibration acceleration of the outer barrel is within the limit value of the vibration acceleration.
In some embodiments, the first de-speeding process comprises: reducing the rotating speed of the inner barrel; detecting the vibration acceleration of the outer barrel in the process of reducing the rotating speed of the inner barrel; when the vibration acceleration of the outer barrel is lower than the vibration acceleration limit value, stopping reducing the rotating speed of the inner barrel; and controlling the inner barrel to rotate at a rotating speed corresponding to the vibration acceleration lower than the vibration acceleration limit value until the dehydration stopping condition is met.
In some embodiments, before determining the eccentricity of the load distribution in the inner tub according to the displacement of the outer tub in the first rotation speed stage, the method further comprises: acquiring the displacement of the outer barrel; when the displacement exceeds the set displacement range, the inner barrel is subjected to a second speed reduction treatment process so as to adjust the load distribution in the inner barrel after speed reduction.
In some embodiments, the second derating process comprises: reducing the rotating speed of the inner barrel to a set shaking and scattering speed range; and carrying out shaking-up treatment on the load in the inner barrel.
In some embodiments, the method further comprises: recording the times of shaking treatment; and controlling the washing machine to stop dewatering after the times of shaking treatment on the load in the inner barrel reach a preset threshold value.
According to another aspect of the present application, there is also provided a washing machine including: a box body; the dewatering barrel is fixed in the box body and comprises an inner barrel and an outer barrel, and the outer barrel is sleeved on the inner barrel; a displacement sensor arranged on the outer barrel; the controller is electrically connected with the displacement sensor and the inner barrel and is used for determining the eccentric amount of load distribution in the inner barrel according to the displacement of the outer barrel; determining the target rotating speed of the inner barrel according to the corresponding relation between the eccentric amount and the target rotating speed; and controlling the rotation speed of the dewatering tub according to the target rotation speed of the inner tub and the vibration limit value of the outer tub to reduce noise generated during dewatering of the washing machine.
In some embodiments, the washing machine further comprises an acceleration sensor disposed on the outer tub for monitoring a vibration acceleration of the outer tub; the controller is used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor so as to reduce the noise in the dehydration process.
According to the technical scheme, the beneficial effects of the application are as follows:
in the application, the eccentric amount of the inner barrel load is intuitively and accurately obtained through the displacement of the outer barrel in the first rotating speed stage with lower rotating speed. The rotating speed of the second rotating speed stage with higher rotating speed and the vibration upper limit value of the outer barrel are set according to the magnitude of the eccentric amount, the comprehensive control of the dehydration process is realized through the vibration upper limit value and the target rotating speed, and the noise in the dehydration process is reduced on the basis of ensuring the smooth completion of the dehydration process.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic structural view of a washing machine according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating a method for controlling dehydration of a washing machine according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a dehydration control method of a washing machine according to an embodiment of step S170 of fig. 2;
FIG. 4 is a flow diagram of one embodiment of a first de-speeding process in the present application;
FIG. 5 is a flow chart of another embodiment of a first de-speeding process in the present application;
FIG. 6 is a flow chart of yet another embodiment of a first de-speeding process in the present application.
Detailed Description
While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.
Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front, and rear) are used to explain the structures and movements of the various elements of the present application not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
The preferred embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
First, the structure of the washing machine in the present application will be described.
Fig. 1 is a schematic structural view of a washing machine according to an embodiment of the present application. As shown in fig. 1, the washing machine includes at least a door seal 10, a motor driving assembly 20, an outer tub 30, an inner tub 40, a cabinet 50, a sensor 60, an elastic connector 70, a motor 80, and a shock-absorbing connector 90.
Wherein, the dewatering tub comprises an outer tub 30 and an inner tub 40, and the inner tub 40 is rotatably fixed in the outer tub 30. The door seal 10 is pivotably provided to the cabinet 50 for opening or closing the inner tub 40.
The outer tub 30 is fixed in the cabinet 50 of the washing machine by the damper coupling 90 and the elastic coupling 70. The shock-absorbing connector 90 serves to provide a supporting force to the outer tub 30 on one hand and to absorb vibration of the outer tub 30 through mechanical damping on the other hand, thereby reducing vibration of the outer tub 30 transferred to the cabinet 50. The elastic connection member 70 may be a suspension spring, and also has a damping and fixing function. The number of the shock-absorbing connector 90 and the elastic connector 70 may be plural to provide a multi-point supporting force to the outer tub 30 and reduce vibration of the outer tub 30 transferred to the cabinet 50.
The sensor 60 is disposed on the outer tub 30 for detecting parameters such as vibration displacement and vibration acceleration of the outer tub. The sensor 60 is connected with a controller of the washing machine for transmitting the detected parameters to the controller.
In the dehydration process, the controller of the washing machine sends a dehydration command to the motor driving device, the motor driving device drives the motor 80 to rotate, the motor 80 drives the inner barrel 40 to rotate through the motor transmission assembly 20, and the inner barrel 40 is provided with small holes distributed at intervals. When the inner tub 40 rotates, the clothes in the inner tub 40 generate centrifugal force, and the moisture in the clothes is thrown out from the small holes under the action of the centrifugal force, thereby achieving the purpose of dewatering the clothes.
It is easily understood that the magnitude of the centrifugal force is related to the rotation speed of the inner tub, and the weight distribution of the load of laundry in the inner tub. When the clothes load in the inner barrel is not uniformly distributed along the wall of the inner barrel, the centrifugal force in the circumferential direction of the inner barrel is inconsistent.
This application carries out dehydration control to the dehydration bucket through setting up vibration and displacement isoparametric that the sensor of outer bucket detected, and the noise that produces when aim at reduces washing machine dehydration.
Fig. 2 is a flowchart of a dehydration control method of a washing machine according to an embodiment of the present application. As shown in fig. 2, in this embodiment, the spin-drying control method of the washing machine may be specifically performed by a controller of the washing machine, and the method includes at least the following steps S110 to S170.
And step S110, controlling the inner barrel to rotate for dewatering in response to the dewatering instruction.
The dehydration instruction can be sent out after a user triggers a specified dehydration key, or can be automatically triggered in a series of clothes cleaning processes.
After a controller of the washing machine sends out a dehydration instruction, the washing machine controls a motor driving device to drive an inner barrel to rotate so as to realize dehydration.
Step S130, in the first rotation speed stage, the eccentric amount of the load distribution in the inner tub is determined according to the displacement amount of the outer tub.
The inner barrel has a first rotating speed stage and a second rotating speed stage when in dehydration, and the rotating speed of the first rotating speed stage is less than that of the second rotating speed stage. Specifically, the first rotation speed stage and the second rotation speed stage can be distinguished through a set rotation speed threshold, and schematically, a rotation speed lower than the rotation speed threshold is the first rotation speed stage, and a rotation speed higher than the rotation speed threshold is the second rotation speed stage.
When the inner barrel rotates, if the load distribution of the articles in the inner barrel is uneven, the inner barrel rotates under the action of centrifugal force, so that the outer barrel can be displaced.
The displacement of the outer barrel can be detected by a sensor arranged on the outer barrel.
This application confirms the eccentric volume of interior bucket load distribution through the displacement volume that detects outer bucket, can learn more directly perceivedly whether the eccentric volume of interior bucket load distribution has led to the skew of outer bucket, if lead to the skew of outer bucket, the condition such as how of size of displacement.
The corresponding relation between the displacement of the outer barrel and the eccentric amount of the load distribution in the inner barrel can be obtained through multiple tests, so that the eccentric amount of the load distribution in the inner barrel can be determined according to the displacement of the outer barrel.
The eccentric mass is the mass of the eccentric block, and the eccentric block is the redundant mass block of the rotor in the rotation process. In other words, the eccentricity is the eccentric mass due to uneven distribution of the clothes in the washing machine.
Step S150, determining a target rotation speed of the inner tub at the second rotation speed stage and a vibration upper limit value of the outer tub according to the eccentricity.
The target rotating speed is the rotating speed when the inner barrel rotates stably for dehydration. It is easy to understand that the magnitude of the centrifugal force of the eccentric mass is related to the rotation speed and the eccentric amount.
In some embodiments, the target rotation speed corresponding to different eccentricity amounts can be determined through multiple experiments, so that the noise generated when the clothes load with the eccentricity amount rotates at the target rotation speed is controlled within a set range.
In other embodiments, the target rotation speed of the inner tub in the second rotation speed stage can be calculated according to different eccentricity by establishing a rotation model of the washing machine, so that the noise can be minimized on the basis of not influencing the dewatering performance.
The upper limit value of the vibration of the outer barrel is the allowable extreme value of the vibration of the outer barrel. The upper limit value of the vibration of the outer barrel is related to variables such as the distance between the outer barrel and the box body and the damping parameter of the connecting piece between the outer barrel and the box body. In one embodiment, when the eccentricity is large, a large vibration upper limit value of the tub may be set within a safety range, thereby performing dehydration on a safe basis. When the eccentricity is small, a vibration upper limit value of the small outer barrel can be set in a safety range to reduce the dewatering noise.
Step S170, controlling the rotating speed of the dewatering tub 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 dewatering of the washing machine.
As described above, the centrifugal force of the eccentric mass is related to the rotational speed and the amount of eccentricity. Therefore, on the basis of the known eccentric amount, the centrifugal force of the eccentric load can be controlled through the target rotating speed of the inner barrel, and the eccentric load can be prevented from generating large noise due to excessive vibration. It will be readily appreciated that a lower target rotational speed may be set at higher eccentricities. And, simultaneously, carry out vibration control to the outer bucket through the vibration upper limit value of outer bucket, prevent to appear producing great noise because of outer bucket vibration is too big, even produce the condition of incident.
Therefore, in the first rotating speed stage with lower rotating speed, the eccentric amount of the inner barrel load can be intuitively and accurately obtained through the displacement amount of the outer barrel. And the rotating speed of the second rotating speed stage and the vibration upper limit value of the outer barrel are set according to the magnitude of the eccentric quantity, the comprehensive control of the dehydration process is realized through the vibration upper limit value and the target rotating speed, and the noise in the dehydration process can be reduced on the basis of ensuring the smooth completion of the dehydration process.
Fig. 3 is a flowchart illustrating a dehydration control method of the washing machine according to an embodiment of step S170 in fig. 2. In this embodiment, the vibration upper limit value includes a vibration acceleration upper limit value; the step S170 of controlling the rotation speed of the spin-drying tub according to the target rotation speed of the inner tub and the upper limit value of the vibration of the outer tub may specifically include the following steps S171, S173, and S175.
Step S171, controlling the inner barrel to increase speed according to the determined target rotating speed;
step S173, monitoring the vibration acceleration of the outer tub during the acceleration of the inner tub;
in step S175, when the vibration acceleration of the outer tub reaches the upper limit of the vibration acceleration, a first speed reduction process is performed on the inner tub to control the vibration acceleration of the outer tub within the upper limit of the vibration acceleration.
Specifically, the magnitude of the vibration noise can be reflected by the vibration acceleration, and the greater the vibration acceleration, the greater the vibration noise.
The acceleration of the outer tub can be intuitively and conveniently acquired through the acceleration sensor arranged on the outer tub. Illustratively, the acceleration sensor may be a three-dimensional acceleration sensor, so as to detect the accelerations of the outer tub on the X axis, the Y axis and the Z axis, respectively, and compare the acceleration of the axial direction with the largest value thereof with the vibration acceleration upper limit value to determine whether the acceleration exceeds the acceleration limit value.
The first speed reduction processing procedure is used for reducing the speed of the inner barrel under the condition that the vibration acceleration of the outer barrel reaches the vibration acceleration upper limit value, so that the vibration acceleration of the outer barrel is controlled within the vibration acceleration upper limit value.
In some embodiments, after monitoring the vibration acceleration of the outer tub, the washing machine spin-drying control method further includes the steps of: under the condition that the vibration acceleration of the outer barrel does not exceed the vibration acceleration upper limit value, controlling the inner barrel to continuously increase the speed until the determined target rotating speed is reached; controlling the inner barrel to rotate at the target rotating speed until the dehydration stopping condition is met.
Therefore, the vibration noise can be controlled through the upper limit value of the vibration acceleration, and the condition that the dehydration noise is too large is prevented.
The first speed reduction process may be a plurality of speed reduction modes such as a stepped speed reduction mode, a flexible speed reduction mode, etc., and the first speed reduction process will be described in detail in the following with a plurality of embodiments.
FIG. 4 is a flow diagram of one embodiment of a first de-speeding process in the present application. As shown in fig. 4, the first speed reduction processing procedure may specifically include steps S410 to S420:
step S410, reducing the rotating speed of the inner barrel to a target rotating speed corresponding to the next eccentricity level; monitoring the vibration acceleration of the outer barrel;
in step S420, if the vibration acceleration of the outer tub still exceeds the vibration acceleration upper limit, the rotation speed of the inner tub is continuously reduced until the vibration acceleration of the outer tub is within the vibration acceleration upper limit.
Specifically, according to the displacement of the outer barrel, the eccentricity of the load distribution in the inner barrel is determined, which specifically comprises: and determining the eccentric magnitude grade of the load distribution in the inner barrel according to the displacement of the outer barrel.
The load distribution in the inner barrel can have a plurality of eccentricity levels, one eccentricity level corresponds to one target rotating speed, thereby reducing the control complexity of the washing machine, improving the control reliability,
and when the vibration acceleration of the outer barrel reaches the upper limit value of the vibration acceleration, reducing the rotating speed of the inner barrel to the target rotating speed corresponding to the next eccentricity level, and detecting the vibration acceleration of the outer barrel again. And if the vibration acceleration is within the upper limit value of the vibration acceleration, dewatering at the target rotating speed reduced by one grade until the dewatering is finished. If the vibration acceleration of the outer barrel still exceeds the vibration acceleration upper limit value, the target rotating speed corresponding to the next eccentricity level can be reduced until the vibration acceleration of the outer barrel is within the vibration acceleration upper limit value.
In one embodiment, to ensure the dehydration performance, a lower limit value of the dehydration rotation speed may be set, and when the rotation speed of the inner tub is reduced below the lower limit value of the dehydration rotation speed, the dehydration is stopped, and a prompt to redistribute the laundry load is issued or an operation step of redistributing the laundry load is performed.
FIG. 5 is a flow chart of another embodiment of a first derating process in the present application. As shown in fig. 5, the first speed-down processing procedure may specifically include the following steps:
step S501, if the determined eccentricity level is a first eccentricity level, dehydrating at a first target rotating speed in a second rotating speed stage;
step S502, detecting whether the vibration acceleration of the outer barrel exceeds the set vibration acceleration upper limit value A1 or not in the dehydration process; if not, executing step S503, if yes, executing step S504;
step S503, dewatering at a first target rotating speed;
step S504, reducing the rotating speed of the inner barrel to a second target rotating speed;
step S505, detecting whether the vibration acceleration of the outer barrel exceeds a set vibration acceleration upper limit value A2 or not in the dehydration process; if not, executing step S506, if yes, executing step S507;
step S506, dewatering at a second target rotating speed;
step S507, reducing the rotation speed of the inner tub to a third target rotation speed;
step S508, in the dehydration process, detecting whether the vibration acceleration of the outer barrel exceeds the set vibration acceleration upper limit value A3; if not, executing step S509, if yes, executing step S510;
step S509, dehydrating at a third target rotation speed;
step S510, reducing the rotation speed of the inner tub to a fourth target rotation speed;
step S511, detecting whether the vibration acceleration of the outer barrel exceeds a set vibration acceleration upper limit value A4 or not in the dehydration process; if not, go to step S512, if yes, go to step S513;
step S512, dewatering at a fourth target rotating speed;
and step S513, alarming when the vibration exceeds the limit.
Specifically, a vibration overrun alarm may be used to prompt the user to redistribute the clothes load.
Specifically, at least four eccentricity levels may be set. Illustratively, the first eccentricity level may be set when the eccentricity is less than 300g, the second eccentricity level when the eccentricity is not less than 300g and not more than 500g, the third eccentricity level when the eccentricity is not less than 500g and not more than 700g, and the fourth eccentricity level when the eccentricity is not less than 700g and not more than 1000 g. When the eccentricity exceeds 1000g, a prompt for redistributing the clothes load is issued or an operation step of redistributing the clothes load is performed.
The vibration acceleration upper limit values corresponding to the first to fourth eccentricity levels are set to A1, A2, A3, and A4, respectively. In addition, the first target rotation speed corresponding to the first eccentricity level can be any value from 1200 to 1400rpm (revolutions per minute), the second target rotation speed corresponding to the second eccentricity level can be any value from 1000 to 1200rpm, the third target rotation speed corresponding to the third eccentricity level can be any value from 800 to 1000rpm, and the fourth target rotation speed corresponding to the fourth eccentricity level can be any value from 700 to 800 rpm. The specific rotation speed value can be determined by those skilled in the art according to the actual conditions of the washing machine.
Note that the target rotational speed is determined according to the level of the eccentricity. Illustratively, if the determined eccentricity level is a second eccentricity level, the inner tub is controlled to rotate at a second target rotation speed first, and then rotation speed control is cooperatively performed through vibration acceleration. Therefore, under the condition that the vibration acceleration of the outer barrel reaches the upper limit value of the vibration acceleration, the rotating speed of the inner barrel is reduced to the target rotating speed corresponding to the next eccentricity level, so that the dewatering process is controlled through the speed reduction and the vibration acceleration, and the noise in the dewatering process is reduced.
FIG. 6 is a flow diagram of a first slow down process according to one embodiment of the present application. As shown in fig. 6, in this embodiment, the first speed-down process includes the steps of:
step S610, reducing the rotating speed of the inner barrel;
step S620, detecting the vibration acceleration of the outer barrel in the process of reducing the rotating speed of the inner barrel;
step S630, when the vibration acceleration of the outer barrel is lower than the vibration acceleration limit value, stopping reducing the rotating speed of the inner barrel;
and step S640, controlling the inner barrel to rotate at a rotating speed corresponding to the vibration acceleration value lower than the vibration acceleration limit value until the dehydration stopping condition is met.
Specifically, after the target rotation speed is set by the eccentricity, if the eccentricity is not detected accurately, the vibration acceleration of the inner tub during the rotation at the target rotation speed is too large or too small.
If the vibration acceleration of the outer barrel exceeds the vibration acceleration limit value when the inner barrel rotates at the target rotation speed, the rotation speed of the inner barrel is reduced, a flexible rotation speed reduction method can be adopted, the rotation speed is reduced by a fixed difference, and the reduction speed difference can be set to be any value from 50rpm to 100 rpm. The specific speed reduction difference value can be flexibly set according to the actual situation.
When the vibration acceleration of the outer barrel is lower than the vibration acceleration limit value, the reduction of the rotating speed of the inner barrel is stopped, so that the vibration noise can be controlled within a certain range on the basis of ensuring the dewatering performance.
In some embodiments, before the step S130, before the first rotation speed stage, before determining the eccentricity of the load distribution in the inner tub according to the displacement of the outer tub, the spin-drying control method of the washing machine may further include the steps of: acquiring the displacement of the outer barrel; when the displacement exceeds the set displacement range, the inner barrel is subjected to a second speed reduction treatment process so as to adjust the load distribution in the inner barrel after speed reduction.
Specifically, the displacement of the outer barrel in multiple axial directions can be obtained at preset time intervals, the displacement of the multiple axial directions is compared with the set displacement range corresponding to the shaft, and when the displacement exceeds the set displacement range, a second speed reduction processing process is carried out on the inner barrel, so that the load distribution in the inner barrel is adjusted after speed reduction.
In some embodiments, the second speed reduction processing procedure may specifically include: reducing the rotating speed of the inner barrel to a set shaking and scattering speed range; and shaking and dispersing the load in the inner barrel. Illustratively, the rotation speed of the inner barrel can be reduced to zero firstly. And controlling the inner barrel to rotate forwards for 2 circles and then rotate backwards for 2 circles, and after the circulation is set for times, increasing the speed again to restart the dehydration.
In some embodiments, the dehydration control method of a washing machine further includes: recording the times of shaking treatment; and controlling the washing machine to stop dewatering after the times of shaking and dispersing the load in the inner barrel reach a preset threshold value. Thus, the dehydration time can be prevented from being excessively long.
According to another aspect of the present application, there is also provided a washing machine including at least a cabinet, a dehydration tub, a displacement sensor, and a controller. The dehydration barrel is fixed in the box body and comprises an inner barrel and an outer barrel, and the inner barrel is sleeved with the outer barrel. The displacement sensor is arranged on the outer barrel. The controller is electrically connected with the displacement sensor and the inner barrel and is used for determining the eccentric amount of load distribution in the inner barrel according to the displacement of the outer barrel; determining the target rotating speed of the inner barrel according to the corresponding relation between the eccentric amount and the target rotating speed; and controlling the rotation speed of the dewatering tub according to the target rotation speed of the inner tub and the vibration limit value of the outer tub to reduce noise generated during dewatering of the washing machine.
In some embodiments, the washing machine further comprises an acceleration sensor disposed on the outer tub for monitoring a vibration acceleration of the outer tub; the controller is used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor so as to reduce the noise in the dehydration process.
The inventive concept of the above washing machine is consistent with the inventive concept of the above washing machine dehydration control method, and is not described herein again.
While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The dewatering control method of the washing machine is characterized in that a dewatering barrel of the washing machine is provided with an inner barrel and an outer barrel; the inner tub has a first rotation speed stage and a second rotation speed stage when being dehydrated, the rotation speed of the first rotation speed stage is less than that of the second rotation speed stage, and the method comprises the following steps:
controlling the inner barrel to rotate for dehydration in response to a dehydration instruction;
in the first rotating speed stage, determining the eccentric amount of the load distribution in the inner barrel according to the displacement amount of the outer barrel;
determining a target rotating speed of the inner barrel in the second rotating speed stage and a vibration upper limit value of the outer barrel according to the eccentricity;
and controlling the rotating speed of the dewatering barrel according to the target rotating speed of the inner barrel and the upper limit value of the vibration of the outer barrel so as to reduce the noise generated during dewatering of the washing machine.
2. The method of claim 1, wherein the vibration upper limit value comprises a vibration acceleration upper limit value; the controlling the rotation speed of the dewatering barrel according to the target rotation speed of the inner barrel and the vibration upper limit value of the outer barrel comprises the following steps:
controlling the inner barrel to increase the speed according to the determined target rotating speed;
monitoring the vibration acceleration of the outer barrel in the acceleration process of the inner barrel;
and under the condition that the vibration acceleration of the outer barrel reaches the upper limit value of the vibration acceleration, carrying out a first speed reduction treatment process on the inner barrel so as to control the vibration acceleration of the outer barrel within the upper limit value of the vibration acceleration.
3. The method according to claim 2, wherein after the monitoring of the vibration acceleration of the outer tub, the method further comprises:
under the condition that the vibration acceleration of the outer barrel does not exceed the upper limit value of the vibration acceleration, controlling the inner barrel to continuously increase the speed until the determined target rotating speed is reached;
and controlling the inner barrel to rotate at the target rotating speed until the dehydration stopping condition is met.
4. The method as claimed in claim 2, wherein said determining the eccentricity of the load distribution in the inner tub according to the displacement of the outer tub comprises:
determining the eccentric magnitude grade of the load distribution in the inner barrel according to the displacement of the outer barrel;
the first speed reduction process includes:
reducing the rotating speed of the inner barrel to a target rotating speed corresponding to the next eccentric amount grade;
monitoring a vibration acceleration of the outer tub;
and if the vibration acceleration of the outer barrel still exceeds the upper limit value of the vibration acceleration, continuously reducing the rotating speed of the inner barrel until the vibration acceleration of the outer barrel is within the limit value of the vibration acceleration.
5. The method of claim 2, wherein the first de-rating process comprises:
reducing the rotating speed of the inner barrel;
detecting a vibration acceleration of the outer tub in a process of reducing a rotation speed of the inner tub;
stopping reducing the rotating speed of the inner barrel when the vibration acceleration of the outer barrel is lower than the vibration acceleration limit value;
and controlling the inner barrel to rotate at a rotating speed corresponding to the vibration acceleration lower than the vibration acceleration limit value until the dehydration stopping condition is met.
6. The method as claimed in claim 1, wherein before determining the eccentricity of the load distribution in the inner tub according to the displacement of the outer tub in the first rotation speed stage, the method further comprises:
acquiring the displacement of the outer barrel;
and when the displacement exceeds a set displacement range, carrying out a second speed reduction treatment process on the inner barrel so as to adjust the load distribution in the inner barrel after speed reduction.
7. The method of claim 6, wherein the second derating process comprises:
reducing the rotating speed of the inner barrel to a set shaking and scattering speed range;
and shaking and dispersing the load in the inner barrel.
8. The method of claim 7, further comprising:
recording the times of shaking treatment;
and controlling the washing machine to stop dewatering after the frequency of shaking treatment on the load in the inner barrel reaches a preset threshold value.
9. A washing machine, characterized by comprising:
a box body;
the dewatering barrel is fixed in the box body and comprises an inner barrel and an outer barrel, and the outer barrel is sleeved on the inner barrel;
a displacement sensor disposed on the outer tub;
the controller is electrically connected with the displacement sensor and the inner barrel and is used for determining the eccentric amount of load distribution in the inner barrel according to the displacement amount of the outer barrel; determining the target rotating speed of the inner barrel according to the corresponding relation between the eccentric amount and the target rotating speed; and controlling the rotating speed of the dewatering barrel according to the target rotating speed of the inner barrel and the vibration limit value of the outer barrel so as to reduce the noise generated during dewatering of the washing machine.
10. The washing machine as claimed in claim 9, further comprising an acceleration sensor provided on the outer tub for monitoring a vibration acceleration of the outer tub; the controller is used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor so as to reduce the noise in the dehydration process.
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| CN202110651174.4A CN115538095A (en) | 2021-06-10 | 2021-06-10 | Washing machine and dewatering control method thereof |
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| CN202110651174.4A CN115538095A (en) | 2021-06-10 | 2021-06-10 | Washing machine and dewatering control method thereof |
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