CN113668183A - Washing machine and dewatering control method thereof - Google Patents
Washing machine and dewatering control method thereof Download PDFInfo
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- CN113668183A CN113668183A CN202111044387.7A CN202111044387A CN113668183A CN 113668183 A CN113668183 A CN 113668183A CN 202111044387 A CN202111044387 A CN 202111044387A CN 113668183 A CN113668183 A CN 113668183A
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000005406 washing Methods 0.000 title claims abstract description 71
- 230000001133 acceleration Effects 0.000 claims abstract description 143
- 230000018044 dehydration Effects 0.000 claims abstract description 75
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 75
- 238000006073 displacement reaction Methods 0.000 claims abstract description 74
- 230000008569 process Effects 0.000 claims abstract description 34
- 230000004044 response Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 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
- 238000012360 testing method 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
- 238000011217 control strategy Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 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
- 238000012806 monitoring device Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 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
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/20—Parameters relating to constructional components, e.g. door sensors
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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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- Control Of Washing Machine And Dryer (AREA)
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, and acquiring the loading capacity of the inner barrel in the rotation process of the inner barrel; in the first rotating speed stage, the rotating speed of the inner barrel is controlled according to the displacement of the outer barrel, and the eccentric amount of load distribution in the inner barrel is determined according to the displacement; determining the target rotating speed of the inner barrel in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer barrel according to the eccentric amount and the load; and in the second rotating speed stage, rotating speed control is carried out on the inner barrel according to the determined target rotating speed and the vibration acceleration upper limit value. The method of the embodiment of the application can reduce the dehydration noise of the washing machine.
Description
Technical Field
The application relates to the technical field of washing machines, in particular to a washing machine and a dehydration control method thereof.
Background
The eccentricity of the washing machine needs to be detected in the dewatering process of the washing machine, the eccentricity detection algorithm of the existing washing machine mainly detects the eccentricity through the fluctuation of the rotating speed of a motor, and the detection speed is 90rpm-140 rpm. However, when the laundry load of the washing machine is large, the laundry load cannot be attached to the inner wall of the washing machine well, and the laundry load discharges water under the action of centrifugal force as the dehydration rotation speed of the washing machine increases, so that the eccentricity of the laundry load changes during the dehydration process. Meanwhile, the eccentricity detection rotating speed of the washing machine is low, so that the detection difficulty of the complex eccentricity condition of the clothes load is high. When there is a large deviation in the laundry load eccentricity detection, a large vibration noise problem of the washing machine may be caused.
Therefore, how to reduce the noise generated during the dewatering process of the washing machine has been a problem to be solved by those skilled in the art.
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
Another object of the present application is to provide a dehydration control method of a washing machine capable of reducing dehydration noise of the washing machine.
An object of the present application is to provide a washing machine with low noise 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 in dehydration, 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, and acquiring the loading capacity of the inner barrel in the rotation process of the inner barrel; in the first rotating speed stage, the rotating speed of the inner barrel is controlled according to the displacement of the outer barrel, and the eccentric amount of load distribution in the inner barrel is determined according to the displacement; determining the target rotating speed of the inner barrel in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer barrel according to the eccentric amount and the load; and in the second rotating speed stage, the rotating speed of the inner barrel is controlled according to the determined target rotating speed and the vibration acceleration upper limit value so as to reduce the dehydration noise of the washing machine.
In some embodiments, the acquiring of the capacity of the inner tub during the rotation of the inner tub includes: in the rotating process of the inner barrel, acquiring the displacement change rate and/or the acceleration of the inner barrel in a set direction; and determining the capacity of the inner barrel according to the displacement change rate and/or the acceleration.
In some embodiments, determining the target rotation speed of the inner tub in the second rotation speed stage and the upper limit value of the vibration acceleration of the outer tub according to the eccentricity amount and the load amount includes: determining a rotating speed sequence and determining a vibration acceleration upper limit value sequence according to the load; and selecting a target rotating speed of the inner barrel from the rotating speed sequence according to the eccentricity, and selecting a target vibration acceleration upper limit value from the vibration acceleration upper limit value sequence as the vibration acceleration upper limit value of the outer barrel.
In some embodiments, in the first rotation speed stage, the rotating speed control of the inner tub according to the displacement of the outer tub includes: acquiring an upper limit value of a displacement of the outer barrel, wherein the upper limit value of the displacement is determined according to the physical structure of the washing machine; controlling the inner barrel to rise under the condition that the displacement of the outer barrel does not exceed the displacement upper limit value; and when the displacement of the outer barrel exceeds the upper limit value of the displacement, controlling the inner barrel to reduce the speed and carrying out shaking treatment.
In some embodiments, after performing the dithering process, the method further comprises: 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.
In some embodiments, in the second rotation speed phase, the rotation speed control of the spin-drying tub according to the determined target rotation speed and the vibration acceleration upper limit value includes: in the second rotating speed stage, 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; controlling the inner barrel to rotate at the target rotating speed until the dehydration stopping condition is met.
In some embodiments, in the second rotation speed stage, the rotation speed control of the inner tub according to the determined target rotation speed and the vibration upper limit value further includes: reducing the rotating speed of the inner barrel under the condition that the vibration acceleration of the outer barrel exceeds the upper limit value of the vibration acceleration until the vibration acceleration is lower than or equal to the upper limit value of the vibration acceleration; and controlling the inner barrel to rotate at a corresponding rotating speed when the vibration acceleration is lower than or equal to the vibration acceleration limit value until the dehydration stopping condition is met.
In some embodiments, after the rotating speed of the inner tub is reduced in a case where the vibration acceleration of the outer tub exceeds the vibration acceleration upper limit value, the method further includes: monitoring the rotating speed of the inner barrel; when the rotating speed of the inner barrel is reduced to the lower limit value of the lowest dewatering speed, if the vibration acceleration still exceeds the upper limit value of the vibration acceleration, a prompt of vibration overrun is sent out.
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, the outer barrel is sleeved on the inner barrel, the inner barrel is provided with a first rotating speed stage and a second rotating speed stage during dewatering, and the rotating speed of the first rotating speed stage is less than that of the second rotating speed stage;
a displacement detection device arranged on the outer barrel; a displacement amount for acquiring the outer barrel;
the controller is electrically connected with the inner barrel and the displacement detection device and is used for controlling the rotating speed of the inner barrel according to the displacement of the outer barrel detected by the displacement detection device and determining the eccentric amount of load distribution in the inner barrel according to the displacement; determining the target rotating speed of the inner barrel in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer barrel according to the eccentric amount and the load; and in the second rotating speed stage, the rotating speed of the inner barrel is controlled according to the determined target rotating speed and the vibration acceleration upper limit value so as to reduce the dehydration noise of the washing machine.
In some embodiments, the washing machine further includes an acceleration sensor disposed on the outer tub for detecting a vibration acceleration of the outer tub; the controller is also used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor.
According to the technical scheme, the beneficial effects of the application are as follows:
in this application, in the lower first rotational speed stage of rotational speed, carry out directly perceived, conveniently dehydration control through the displacement volume, with the anti-generation hits a bucket noise, and according to the displacement volume, confirm the load capacity and the eccentric volume of interior bucket, and then set up the target rotational speed in second rotational speed stage and the vibration acceleration upper limit value of outer bucket according to the size of load capacity and eccentric volume, with through vibration acceleration upper limit value and target rotational speed realization to the integrated control of dehydration, thereby guarantee on the basis of the smooth completion of dehydration, realize making an uproar falls.
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 of a dehydration control method of a washing machine according to an embodiment of the present application.
Fig. 3 is a method for determining an upper limit value of a vibration acceleration and a target rotation speed according to a load amount and an eccentricity amount according to an embodiment of the present application.
Fig. 4 is a method for performing dehydration control according to a target rotation speed and an upper limit value of vibration acceleration according to an embodiment of the present application.
FIG. 5 is a flow chart of a first derating process according to another embodiment of the present application.
Fig. 6 is a flowchart of a dehydration control method of a washing machine according to another embodiment of 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 thereof 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, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement 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 further described in detail below with reference to the accompanying drawings of the present specification.
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 damper link 90 serves to provide a supporting force to the outer tub 30 on the one hand and to damp 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 and is used 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 easy to understand that when the clothes load in the inner barrel is not evenly distributed along the wall of the inner barrel, the centrifugal force in the circumferential direction of the inner barrel is inconsistent. When the inner barrel is large in loading capacity and large in eccentric amount, the inner barrel is violently vibrated by large centrifugal force, and large noise is generated.
Conventionally, the amount of load, the amount of eccentricity and the amount of dewatering noise are generally proportional. Therefore, the control strategy corresponding to the combination of the load amount and the eccentricity amount can be set according to the load amount and the eccentricity amount. This application carries out dehydration control through parameters such as load, eccentricity, and the target lies in reducing the dehydration noise.
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 dehydration control method of the washing machine may be specifically performed by a controller of the 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 in dehydration, and 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 includes at least the following steps S210 to S240.
And S210, responding to a dehydration instruction, controlling the inner barrel to rotate for dehydration, and acquiring the load capacity of the inner barrel in the rotation process of the inner barrel.
The dehydration instruction can be sent after a user triggers a specified dehydration key, or can be automatically triggered in a series of clothes cleaning processes. After the controller of the washing machine sends out a dehydration command, the washing machine controls the motor driving device to drive the inner barrel to rotate so as to perform dehydration.
The loading amount of the inner tub is a loading amount of a driving device of the washing machine. The loading capacity comprises the weight of the substance to be dehydrated and the contained water in the inner barrel and the loading capacity of the inner barrel. It will be readily appreciated that the greater the weight of the material to be dewatered and the water contained therein, the greater the amount of loading which would result in greater dewatering noise. In one embodiment, the capacity of the inner tub may be determined according to a displacement change rate and/or acceleration of the inner tub in a set direction. The set direction can be any radial direction of the dewatering barrel.
Step S220, in the first speed rotation stage, the speed of the inner barrel is controlled according to the displacement of the outer barrel, and the eccentric amount of the load distribution in the inner barrel is determined according to the displacement.
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.
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 by 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. Specifically, the displacement amount generated per unit time may be detected a plurality of times, and the displacement amount with the largest value obtained may be used as the displacement amount for determining the eccentricity.
However, the variation of the eccentric amount is complicated during the rotation of the inner tub. In order to realize the accurate monitoring to the eccentric amount, the technical scheme of this application controls the dehydration process through the outer bucket displacement volume of control at first rotational speed stage to can acquire the eccentric amount directly perceivedly, avoid producing great dehydration noise because of the displacement is big.
Step S230, determining a target rotation speed of the inner tub in the second rotation speed stage and an upper limit value of a vibration acceleration of the outer tub according to the eccentric amount and the load amount.
It is easy to understand that the variation of the eccentricity is more complicated when the load amount is large. Therefore, in the present application, the dewatering is controlled cooperatively by the amount of eccentricity and the amount of load.
Specifically, the target rotating speed of the inner tub in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer tub are determined according to the eccentric amount and the load amount. Wherein, the target rotating speed is the rotating speed when the inner barrel rotates stably for dehydration. 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 some embodiments, the target rotation speed corresponding to different eccentric amounts and different load amounts can be determined through multiple experiments, so that the noise of the combination with each eccentric amount and load amount rotating at the target rotation speed is controlled within a set range. Specifically, the vibration control method corresponding to the load amount can be selected according to the load amount, and then fine control is performed according to the eccentric amount, so that noise reduction is realized. In another embodiment, when the eccentricity amount 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. In another embodiment, the target rotation speed of the inner tub in the second rotation speed stage may be calculated according to the combination of each eccentricity and load amount by establishing a rotation model of the washing machine, so that the noise may be minimized without affecting the dehydrating performance.
Step S240, in the second rotation speed stage, the rotation speed of the inner tub is controlled according to the determined target rotation speed and the upper limit of the vibration acceleration, so as to reduce the dewatering noise of the washing machine.
The centrifugal force of the eccentric mass is related to the rotating speed and the eccentric amount. Therefore, on the basis of the known eccentric amount, the centrifugal force of the eccentric load can be controlled by the rotating speed of the inner barrel, and the eccentric load is prevented from generating large noise due to excessive vibration. Specifically, a lower target rotational speed may be set when the amount of eccentricity is greater. 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 dewatering control is visually and conveniently carried out through the displacement amount so as to prevent barrel collision noise, the loading amount and the eccentric amount of the inner barrel are determined according to the displacement amount, the target rotating speed in the second rotating speed stage and the vibration acceleration upper limit value of the outer barrel are set according to the loading amount and the eccentric amount, the comprehensive control of the dewatering process is realized through the vibration acceleration upper limit value and the target rotating speed, and the noise reduction is realized on the basis of ensuring the smooth completion of the dewatering process.
In one embodiment, the load amount may be subdivided into small loads, medium loads, large loads, and extra-large loads. Schematically, taking a washing machine with 10kg capacity as an example, the small load is a load below 3kg, the medium load is a load of 3-5kg, the large load is a load of 5-8kg, and the extra load is a load of 8-10 kg. The eccentricity amount can be subdivided into four levels of first eccentricity, second eccentricity, third eccentricity, and fourth eccentricity. Wherein first eccentricity < second eccentricity < third eccentricity < fourth eccentricity. Still taking the 10kg capacity washing machine as an example, when the eccentricity is less than 300g, the first eccentricity can be set, when the eccentricity is not less than 300g and not more than 500g, the second eccentricity is set, when the eccentricity is not less than 500g and not more than 700g, the third eccentricity is set, when the eccentricity is not less than 700g and not more than 1000g, the fourth eccentricity is set, and when the eccentricity exceeds 1000g, the prompt of redistributing the clothes load can be sent or the operation step of redistributing the clothes load can be executed.
Table 1 is a schematic table for obtaining the displacement amount from the load amount and the eccentric amount; table 2 is an explanatory table for obtaining the acceleration upper limit value from the load amount and the eccentricity amount. The displacement amounts obtained in table 1 are used for the spin-drying control in the first rotation speed stage, and the target rotation speeds obtained in table 2 are used for the rotation speed control in the second rotation speed stage.
In the first rotation speed stage, the displacement of the outer tub is determined based on the load and the eccentric amount to control dewatering based on the displacement.
| First eccentricity | Second eccentricity | Third eccentricity | Fourth eccentricity | |
| Light load | D11 | D12 | D13 | D14 |
| Middle load | D21 | D22 | D23 | D24 |
| Heavy load | D31 | D32 | D33 | D34 |
| Ultra-large load | D41 | D42 | D43 | D44 |
TABLE 1 Displacement corresponding to Capacity and eccentricity
| First eccentricity | Second eccentricity | Third eccentricity | Fourth deviationHeart with heart-shaped | |
| Light load | A11 | A12 | A13 | A14 |
| Middle load | A21 | A22 | A23 | A24 |
| Heavy load | A31 | A32 | A33 | A34 |
| Ultra-large load | A41 | A42 | A43 | A44 |
TABLE 2 vibration acceleration upper limit value corresponding to load amount and eccentricity amount
As shown in table 1, in case of a small load in the inner tub, in case of the detected eccentricity being the first eccentricity, the displacement amount of the outer tub is determined as D11, and rotation control is performed through D11. Specifically, when the tub displacement exceeds D11, the speed reduction process may be performed. In the case where the detected eccentricity is the fourth eccentricity, the displacement amount of the tub is determined as D14.
The displacement is a maximum displacement limit value allowed by a combination of different eccentric amounts and load amounts in the first rotation speed stage. The maximum displacement limit is mainly related to the physical structure of the washing machine, such as the gap between the outer tub and the cabinet of the washing machine. The maximum displacement limit may be tested in a particular washing machine, and in particular, in a particular washing machine, in a maximum run-out test in a first speed stage of the set target speed.
In the first rotating speed stage, the upper limit value of the vibration acceleration of the outer barrel and the target rotating speed are determined through the load amount and the eccentric amount, and then in the second rotating speed stage, the dehydration control is carried out through the determined target rotating speed and the upper limit value of the vibration acceleration.
Fig. 3 is a method for determining an upper limit value of a vibration acceleration and a target rotation speed according to a load amount and an eccentricity amount according to an embodiment of the present application. As shown in fig. 3, the dehydration control method includes the following steps S310 and S320:
step S310, determining a rotating speed sequence and determining a vibration acceleration upper limit value sequence according to the load;
step S320, selecting a target rotating speed of the inner barrel from the rotating speed sequence according to the eccentricity, and selecting a target vibration acceleration upper limit value from the vibration acceleration upper limit value sequence as a vibration acceleration upper limit value of the outer barrel.
Specifically, as shown in table 2, the series of upper limit values of the vibration acceleration corresponding to the small load is a11, a12, a13, and a 14; the upper limit value sequences of the vibration acceleration corresponding to the medium load are A21, A22, A23 and A24; the upper limit value sequences of the vibration acceleration corresponding to the large load are A31, A32, A33 and A34; the vibration acceleration upper limit value sequences corresponding to the overlarge are A41, A42, A43 and A44. And then, selecting a target vibration acceleration upper limit value from the determined vibration acceleration upper limit value sequence according to the eccentricity amount as a vibration acceleration upper limit value of the outer barrel. For example, the upper limit value of the vibration acceleration corresponding to the small load and the first eccentricity is a11, the upper limit value of the vibration acceleration corresponding to the extra-large load and the first eccentricity is a41, and so on, and the description thereof is omitted. The vibration acceleration upper limit value of the second rotating speed stage corresponding to different load quantity and eccentricity combination can be determined in practical tests. When the detected vibration acceleration exceeds the vibration acceleration upper limit value, the rotating speed of the inner barrel can be reduced, so that the acceleration of the washing machine is ensured to be smaller than the set vibration acceleration upper limit value, and the vibration noise is controlled.
Fig. 4 is a method for performing dehydration control according to a target rotation speed and an upper limit value of vibration acceleration according to an embodiment of the present application. As shown in fig. 4, the method specifically includes:
step S410, in the second rotating speed stage, 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 step S420, controlling the inner barrel to rotate at the target rotating speed until the dehydration stopping condition is met.
Specifically, the acceleration of the outer tub can be intuitively and conveniently acquired by an acceleration sensor arranged on the outer tub. Illustratively, the acceleration sensor may be a three-dimensional acceleration sensor for detecting the accelerations of the tub in the X-axis, the Y-axis and the Z-axis, respectively, and comparing the maximum acceleration with the upper limit value of the vibration acceleration to determine whether the maximum acceleration exceeds the acceleration limit value.
The specific process is as follows: and controlling the inner barrel to continuously increase the speed according to the determined target rotating speed, monitoring the vibration acceleration of the outer barrel in the increasing process of the inner barrel, controlling the inner barrel to continuously increase the speed until the determined target rotating speed is reached under the condition that the vibration acceleration of the outer barrel does not exceed the upper limit value of the vibration acceleration, and then 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.
In another embodiment, in the case that the vibration acceleration of the outer tub reaches the vibration acceleration upper limit value during the rotation, the first deceleration process may be performed on the inner tub, thereby controlling the vibration acceleration of the outer tub within the vibration acceleration upper limit value.
The first speed reduction processing process can be in a plurality of speed reduction modes such as stepped speed reduction, flexible speed reduction and the like. Illustratively, the flexible deceleration mode is as follows: 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 smaller than or equal to the upper limit value of the vibration acceleration, and then the speed is maintained for dewatering until the dewatering is finished.
FIG. 5 is a flow chart of a first derating process according to another embodiment of the present application. As shown in fig. 5, the first speed-down process may specifically include the following steps S501 to S513.
Step S501, if the determined eccentricity is the first eccentricity, dewatering is carried out at the first target rotating speed in the 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 the 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, dehydrating 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, go to step S509, if yes, go to 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 the set vibration acceleration upper limit value A4 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.
In detail, when the load amount is the same, different eccentricity amounts correspond to different target rotation speeds. The first eccentricity corresponds to a first target rotational speed, the second eccentricity corresponds to a second target rotational speed, the third eccentricity corresponds to a third target rotational speed, and the fourth eccentricity corresponds to a fourth target rotational speed. Accordingly, the upper limit value of the vibration acceleration corresponding to the first eccentricity is a1, the upper limit value of the vibration acceleration corresponding to the second eccentricity is a2, the upper limit value of the vibration acceleration corresponding to the third eccentricity is A3, and the upper limit value of the vibration acceleration corresponding to the fourth eccentricity is a 4. The first target rotation speed may be 1200-1400 rpm, the second target rotation speed may be any of 1000-1200rpm, the third target rotation speed may be any of 800-1000rpm, and the fourth target rotation speed may be any of 700-800 rpm. The specific rotation speed value can be determined by those skilled in the art according to the actual conditions of the washing machine.
When the determined eccentricity amount is the first eccentricity, the corresponding target rotation speed is the first target rotation speed. Wherein the first eccentricity < the second eccentricity < the third eccentricity < the fourth eccentricity, the first target rotation speed > the second target rotation speed > the third target rotation speed > the fourth target rotation speed. That is to say, when the eccentric amount is large, the vibration control is performed on the outer barrel through setting a low target rotating speed and the vibration upper limit value of the outer barrel, so that the situation that large noise is generated due to the excessive vibration of the outer barrel and even safety accidents are generated is prevented.
It is to be noted that the target rotation speed sequence and the vibration acceleration upper limit value sequence are first determined according to the load amount. When the load amount is the same, the target rotation speed and the upper limit value of the vibration acceleration are determined according to the level of the eccentricity. Therefore, if the determined eccentricity amount is the second eccentricity, the inner tub is controlled to be accelerated to the second target rotation speed, and then rotation speed control is performed by the cooperation of vibration acceleration, so that the complexity of system control can be reduced, and noise in the dewatering process can be reduced.
In one embodiment, to ensure the dewatering performance, a lower dewatering speed limit may be set, and when the inner tub rotates to a speed lower than the lower dewatering speed limit, the dewatering is stopped, and a prompt to redistribute the laundry load overrun is issued or the operation step of redistributing the load is performed.
For ease of understanding, the inventive concepts of the present application are described below in a more detailed example.
Fig. 6 is a flowchart of a dehydration control method of a washing machine according to another embodiment of the present application. As shown in fig. 6, the dehydration control method of the washing machine specifically includes the following steps.
Step S601, responding to a dehydration instruction, controlling an inner barrel to rotate for dehydration;
step S602, acquiring the loading capacity of the inner barrel in the rotating process;
step S603, acquiring an eccentric quantity;
step S604, judging whether the eccentricity exceeds the limit; if yes, go to step S605; if not, go to step S608;
step S605, shaking and dispersing, and recording the times of shaking and dispersing treatment;
step S606, judging whether the times of the shaking-up processing exceeds the times limit; if yes, go to step S607; if not, executing step S603;
step S607, sending out an overrun prompt;
step S608, determining a target rotating speed and a vibration acceleration upper limit value in a second rotating speed stage according to the load and the eccentricity;
step S609, controlling the inner barrel to increase the speed, and acquiring the rotating speed of the inner barrel in real time in the increasing process;
step S610, judging whether the rotating speed is greater than S, if not, executing step S612, if so, executing step S615, wherein S is a rotating speed threshold, when the rotating speed is less than or equal to S, the rotating speed is a first rotating speed stage, and when the rotating speed is greater than S, the rotating speed is a second rotating speed stage;
step S611, determining that the vehicle is in the first rotational speed stage;
step S612, in the first rotation speed stage, obtaining the displacement of the outer barrel;
step S613, determining whether the displacement exceeds the maximum displacement limit; if yes, go to step S614; if not, executing step S609;
step S614, reducing the speed and shaking the load to redistribute the load; after redistribution, step S602 is executed;
step S615, when the rotating speed is greater than S, determining to enter a second rotating speed stage, and controlling the inner barrel to continuously increase the speed in the second rotating speed stage;
step S616, in the acceleration process, obtaining the vibration acceleration of the outer barrel;
step S617, determining whether the vibration acceleration exceeds a vibration acceleration upper limit value; if yes, go to step S619; if not, executing step S615;
step S619, performing speed reduction processing until the vibration acceleration is lower than the vibration acceleration upper limit value;
and step S620, maintaining the current rotating speed until the dehydration stopping condition is met, and finishing the dehydration.
Therefore, in the first rotating speed stage with lower rotating speed, the displacement is used for intuitively and conveniently controlling dehydration so as to prevent the generation of barrel collision noise, the loading amount and the eccentric amount of the inner barrel are determined according to the displacement, and the target rotating speed in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer barrel are set according to the loading amount and the eccentric amount. In the second rotating speed stage, the comprehensive control of the dehydration process is realized through the upper limit value of the vibration acceleration and the target rotating speed, so that the noise reduction is realized on the basis of ensuring the smooth completion of the dehydration process.
According to another aspect of the present application, there is also provided a washing machine including at least: the device comprises a box body, a dewatering barrel, a displacement detection device and a controller. The dewatering barrel is fixed in the box body and comprises an inner barrel and an outer barrel, the outer barrel is sleeved on the inner barrel, the inner barrel is provided with a first rotating speed stage and a second rotating speed stage when dewatering is carried out, and the rotating speed of the first rotating speed stage is lower than that of the second rotating speed stage; the displacement monitoring device is arranged on the outer barrel; a displacement amount for acquiring the outer barrel; the controller is electrically connected with the inner barrel and the displacement detection device and is used for controlling the rotating speed of the inner barrel according to the displacement of the outer barrel detected by the displacement detection device and determining the eccentric amount of load distribution in the inner barrel according to the displacement; determining the target rotating speed of the inner barrel in the second rotating speed stage and the upper limit value of the vibration acceleration of the outer barrel according to the eccentric amount and the load; and in the second rotating speed stage, the rotating speed of the inner barrel is controlled according to the determined target rotating speed and the vibration acceleration upper limit value so as to reduce the dehydration noise of the washing machine.
In some embodiments, the washing machine further includes an acceleration sensor disposed on the outer tub for detecting a vibration acceleration of the outer tub; the controller is also used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor.
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. A dewatering control method of a 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, and acquiring the loading capacity of the inner barrel in the rotation process of the inner barrel;
in the first rotating speed stage, the rotating speed of the inner barrel is controlled according to the displacement of the outer barrel, and the eccentric amount of load distribution in the inner barrel is determined according to the displacement;
determining a target rotating speed of the inner barrel and a vibration acceleration upper limit value of the outer barrel in the second rotating speed stage according to the eccentric amount and the load amount;
and in the second rotating speed stage, rotating speed control is carried out on the inner barrel according to the determined target rotating speed and the vibration acceleration upper limit value so as to reduce the dehydration noise of the washing machine.
2. The method of claim 1, wherein the acquiring the loading amount of the inner tub during the rotation of the inner tub comprises:
in the rotating process of the inner barrel, acquiring the displacement change rate and/or the acceleration of the inner barrel in a set direction;
and determining the loading capacity of the inner barrel according to the displacement change rate and/or the acceleration.
3. The method of claim 1, wherein determining the target rotation speed of the inner tub and the upper limit value of the vibration acceleration of the outer tub in the second rotation speed stage according to the eccentricity amount and the load amount comprises:
determining a rotating speed sequence and determining a vibration acceleration upper limit value sequence according to the load;
and selecting a target rotating speed of the inner barrel from the rotating speed sequence according to the eccentricity, and selecting a target vibration acceleration upper limit value from the vibration acceleration upper limit value sequence as a vibration acceleration upper limit value of the outer barrel.
4. The method as claimed in claim 1, wherein the controlling the rotation speed of the inner tub according to the displacement of the outer tub in the first rotation speed stage comprises:
acquiring an upper limit value of a displacement amount of the outer tub, wherein the upper limit value of the displacement amount is determined according to a physical structure of the washing machine;
controlling the inner barrel to rise under the condition that the displacement of the outer barrel does not exceed the displacement upper limit value;
and controlling the inner barrel to reduce the speed and performing shaking treatment when the displacement of the outer barrel exceeds the displacement upper limit value.
5. The method of claim 4, wherein after performing the dithering process, the method further comprises:
recording the times of shaking treatment;
and controlling the washing machine to stop dewatering after the frequency of shaking and dispersing the load in the inner barrel reaches a preset threshold value.
6. The method according to claim 1, wherein the rotating speed controlling the spin-drying tub according to the determined target rotating speed and the vibration acceleration upper limit value in the second rotating speed phase comprises:
in the second rotating speed stage, 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.
7. The method of claim 6, wherein the controlling the rotation speed of the inner tub according to the determined target rotation speed and the vibration upper limit value in the second rotation speed stage further comprises:
reducing the rotating speed of the inner barrel under the condition that the vibration acceleration of the outer barrel exceeds the upper limit value of the vibration acceleration until the vibration acceleration is lower than or equal to the upper limit value of the vibration acceleration;
and controlling the inner barrel to rotate at a corresponding rotating speed when the vibration acceleration is lower than or equal to the vibration acceleration limit value until the dehydration stopping condition is met.
8. The method as claimed in claim 7, wherein after the lowering of the rotation speed of the inner tub in the case that the vibration acceleration of the outer tub exceeds the vibration acceleration upper limit value, the method further comprises:
monitoring the rotation speed of the inner barrel;
and when the rotating speed of the inner barrel is reduced to the lower limit value of the lowest dehydration speed, if the vibration acceleration still exceeds the upper limit value of the vibration acceleration, a prompt of vibration overrun is sent out.
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, the outer barrel is sleeved on the inner barrel, the inner barrel has a first rotating speed stage and a second rotating speed stage when dewatering, and the rotating speed of the first rotating speed stage is less than that of the second rotating speed stage;
the displacement detection device is arranged on the outer barrel; a displacement amount for acquiring the outer tub;
the controller is electrically connected with the inner barrel and the displacement detection device, is used for controlling the rotating speed of the inner barrel according to the displacement of the outer barrel detected by the displacement detection device, and determines the eccentric amount of load distribution in the inner barrel according to the displacement; determining a target rotating speed of the inner barrel and a vibration acceleration upper limit value of the outer barrel in the second rotating speed stage according to the eccentric amount and the load amount; and in the second rotating speed stage, carrying out rotating speed control on the inner barrel according to the determined target rotating speed and the vibration acceleration upper limit value so as to reduce the dehydration noise of the washing machine.
10. The washing machine as claimed in claim 9, further comprising an acceleration sensor provided on the outer tub for detecting a vibration acceleration of the outer tub; the controller is also used for controlling the inner barrel to rotate according to the monitoring result of the acceleration sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114263018A (en) * | 2021-11-29 | 2022-04-01 | 珠海格力电器股份有限公司 | Clothes processing equipment control method and device, storage medium and electronic equipment |
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Country or region after: China Address after: No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. Country or region before: China |