CN107201626B - Drum washing machine and dehydration control method and device thereof and machine readable storage medium - Google Patents
Drum washing machine and dehydration control method and device thereof and machine readable storage medium Download PDFInfo
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- CN107201626B CN107201626B CN201710401208.8A CN201710401208A CN107201626B CN 107201626 B CN107201626 B CN 107201626B CN 201710401208 A CN201710401208 A CN 201710401208A CN 107201626 B CN107201626 B CN 107201626B
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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
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Abstract
The embodiment of the invention provides a drum washing machine, a dehydration control method and device thereof and a machine readable storage medium, and belongs to the technical field of washing machine control. The method comprises the following steps: determining at least a first acceleration fluctuation value in a radial direction of the drum while the drum is rotating at a first rotation speed; selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at the second rotation speed; determining at least a second acceleration fluctuation value of the radial direction while the drum is rotating at a second rotational speed; and controlling the drum to stop the dehydration process when the second acceleration fluctuation value is greater than a first preset threshold value. Through above-mentioned technical scheme, can set up reasonable cylinder rotational speed at drum type washing machine dehydration in-process, prevent that drum type washing machine from vibrations and noise appearing at the dehydration in-process, stop the dehydration in-process through threshold value control washing machine when serious disequilibrium and prevent the inside mechanical parts collision harm of washing machine, improve washing machine's life.
Description
Technical Field
The invention relates to the technical field of washing machine control, in particular to a drum washing machine, a dehydration control method and device thereof and a machine readable storage medium.
Background
Drum washing machines originate in europe and are generally side-opening lids.
In view of structure, the drum washing machine is provided with a rotatable inner drum or drum in a fixed outer drum, and the motor is controlled by a controller to drive the drum to rotate.
In principle, the drum washing machine is designed by simulating the washing principle that a hammer strikes clothes, the mechanical work of the motor is utilized to rotate the drum, the clothes are continuously lifted in the drum, the clothes are dropped by the weight of the clothes, the clothes are repeatedly lifted and then dropped, and the clothes are washed clean under the combined action of washing powder and water, so that the aim of removing dirt is fulfilled.
In the variable frequency drum washing machine, when the drum driven by the variable frequency motor is unbalanced, the higher the rotating speed of the variable frequency motor is, the larger the vibration and noise of the system are, so that the service life of the drum washing machine can be reduced. Therefore, the inverter drum washing machine needs to have a load unbalance detection function, and when a load (such as a drum) is found to be unbalanced, the purpose of reducing vibration and noise of the system can be achieved by adjusting the rotating speed or changing the unbalanced state of the load.
The prior art provides the following imbalance detection methods, as shown in fig. 1:
detecting the unbalance amount of the load at low speed, judging whether to enter high-speed dehydration and dehydration rotating speed according to the unbalance amount, and then dehydrating at the determined dehydration rotating speed.
In the process of implementing the present invention, the inventor of the present application finds that in the above-mentioned scheme of the prior art, the eccentricity changes with the loss of water amount due to the difference of water absorption rate when the clothes are dehydrated at high speed at a determined dehydration rotation speed. Once the large eccentricity occurs, the washing machine may have vibration and noise defects during high-speed dehydration, and may easily cause collision damage to mechanical parts inside the washing machine.
In view of the above technical problems, no good solution is available in the prior art.
Disclosure of Invention
An object of embodiments of the present invention is to provide a method and apparatus that enables a reasonable drum speed to be set during the dehydration process of a drum washing machine.
In order to achieve the above object, an embodiment of the present invention provides a dehydration control method for a drum washing machine, the method including:
determining at least a first acceleration fluctuation value of the drum in a radial direction while the drum is rotating at a first rotation speed;
selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at the second rotation speed;
determining at least a second acceleration fluctuation value of the radial direction while the drum is rotating at the second rotational speed; and
and when the second acceleration fluctuation value is larger than a first preset threshold value, controlling the roller to stop the dehydration process.
Optionally, the method further comprises:
and when the second acceleration fluctuation value is smaller than or equal to a second preset threshold value, selecting a third rotating speed from the preset dehydration rotating speed set, and controlling the roller to rotate at the third rotating speed, wherein the third rotating speed is greater than the second rotating speed, and the second preset threshold value is smaller than the first preset threshold value.
Optionally, the method further comprises:
and when the second acceleration fluctuation value is smaller than or equal to the first preset threshold value and larger than the second preset threshold value, controlling the roller to continuously rotate at the second rotating speed.
Optionally, the first preset threshold and the second preset threshold are associated with the second rotation speed.
Optionally, the first acceleration fluctuation value is a difference value between a maximum value and a minimum value of the acceleration in the radial direction during one rotation of the drum at the first rotation speed; and the second acceleration fluctuation value is the difference value between the maximum value and the minimum value of the acceleration in the radial direction in the process that the roller rotates at the second rotating speed for one circle.
Optionally, the method further comprises determining the first acceleration fluctuation value or the second acceleration fluctuation value after the drum rotates at the first rotation speed or the second rotation speed for a predetermined number of turns.
Optionally, the method further comprises:
and executing preset shaking operation after the roller is controlled to stop the dewatering process.
Optionally, the method further comprises:
after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and
and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
In another aspect, an embodiment of the present invention provides a dehydration control apparatus for a drum washing machine, including:
a controller and an acceleration sensor coupled with the controller, wherein
The acceleration sensor is configured to measure the radial acceleration of the drum; and
the controller configured to:
acquiring a first acceleration fluctuation value of at least the drum in a radial direction from the acceleration sensor while the drum is rotating at a first rotational speed;
selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at the second rotation speed;
acquiring a second acceleration fluctuation value of at least the radial direction from the acceleration sensor while the drum is rotating at the second rotation speed; and
and when the second acceleration fluctuation value is larger than a first preset threshold value, controlling the roller to stop the dehydration process.
Optionally, the controller is further configured to:
and when the second acceleration fluctuation value is smaller than or equal to a second preset threshold value, selecting a third rotating speed from the preset dehydration rotating speed set, and controlling the roller to rotate at the third rotating speed, wherein the third rotating speed is greater than the second rotating speed, and the second preset threshold value is smaller than the first preset threshold value.
Optionally, the controller is further configured to:
and when the second acceleration fluctuation value is smaller than or equal to the first preset threshold value and larger than the second preset threshold value, controlling the roller to continuously rotate at the second rotating speed.
Optionally, the first preset threshold and the second preset threshold are associated with the second rotation speed.
Optionally, the first acceleration fluctuation value is a difference value between a maximum value and a minimum value of the acceleration in the radial direction during one rotation of the drum at the first rotation speed; and the second acceleration fluctuation value is the difference value between the maximum value and the minimum value of the acceleration in the radial direction in the process that the roller rotates at the second rotating speed for one circle.
Optionally, the controller is further configured to: acquiring the first acceleration fluctuation value or the second acceleration fluctuation value from the acceleration sensor after the drum rotates at the first rotation speed or the second rotation speed for a predetermined number of times.
Optionally, the controller is further configured to:
and executing preset shaking operation after the roller is controlled to stop the dewatering process.
Optionally, the controller is further configured to:
after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and
and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
In another aspect, an embodiment of the present invention provides a machine-readable storage medium having stored thereon instructions for causing a machine to perform the above-described method.
In another aspect, an embodiment of the present invention provides a drum washing machine including the above-described apparatus.
Through the technical scheme, the unbalanced state is determined according to the acceleration fluctuation value of the radial direction in the dehydration process of the drum washing machine, the reasonable drum rotating speed can be set in the dehydration process of the drum washing machine, so that the drum washing machine is prevented from shaking and noise in the dehydration process, the dehydration process is stopped by controlling the threshold value when the drum washing machine is seriously unbalanced, the collision damage of mechanical parts in the washing machine can be prevented, and the service life of the washing machine is prolonged.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of a dehydration control method provided by the prior art;
FIG. 2 is a flowchart of a spin-drying control method for a drum washing machine according to an exemplary embodiment of the present invention;
FIG. 3 is a flowchart of a spin-drying control method for a drum washing machine according to another exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the relationship between the rotation speed and the time and the arrangement of the detection points in the dewatering control method for the drum-type washing machine according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a dewatering control device for a drum washing machine according to an exemplary embodiment of the present invention;
fig. 6 is a schematic diagram illustrating the components and the dehydration control principle of the drum washing machine according to an exemplary embodiment of the present invention.
Description of the reference numerals
501 controller 502 acceleration sensor
503 rotational speed detector 601 speed command generating part
602 motor drive control section 603 motor
604 an unbalance processing unit 605.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
It should be noted that the terms "first" and "second" in the description of the present invention are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention.
One skilled in the art will recognize that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The principle of the present invention will be described below by taking the dewatering process of the inverter drum washing machine as an example, and it should be noted that the embodiment of the present invention is not limited thereto.
Fig. 2 is a flowchart of a spin-drying control method for a drum washing machine according to an exemplary embodiment of the present invention. As shown in fig. 2, a dehydration control method for a drum washing machine according to an embodiment of the present invention may include:
s201, when the drum rotates at a first rotating speed, at least a first acceleration fluctuation value of the drum in the radial direction is determined.
For example, in an embodiment, the first rotation speed may be a rotation speed of the drum washing machine before or just before entering the dehydration process, at which the drum washing machine may judge the laundry mass in the drum and the eccentricity or unbalance degree of the drum by detecting the acceleration in at least one radial direction.
In embodiments, at least one of the radial directions determining the drum radial direction may be at least one radial direction may be, for example, two radial directions, three radial directions, more radial directions, etc., in different embodiments, at least one radial direction may also be at least one radial direction and one axial direction. The acceleration fluctuation value may represent a degree of variation in acceleration of the drum circumference (e.g., outer edge) during rotation of the drum, and thus may directly reflect a degree of eccentricity or dynamic unbalance during rotation of the drum.
In an embodiment, a preset threshold may be set for each of the at least one radial direction, respectively. For example, in an example of three radial directions, three preset thresholds may be set for the three radial directions, respectively. Under the influence of external environmental factors such as gravity, the displacement amplitude values appearing in all radial directions of the drum washing machine in the process of one rotation of the drum can be different, so that the unbalanced state of the drum can be judged more accurately by setting different threshold values aiming at different radial directions.
In an embodiment, the acceleration fluctuation value △ S may be a maximum value S of the acceleration in a radial direction during one rotation of the drummaxAnd minimum value SminThe specific relationship can be shown as the following equation (1):
△S＝Smax－Smin(1)
in an embodiment, the acceleration may be measured by an acceleration sensor provided on the drum washing machine tub. For example, one acceleration sensor may be provided for each radial direction. In a different example, a 3D (three-dimensional) acceleration sensor may be provided to measure accelerations in a plurality of directions, such as three orthogonal directions.
S202, selecting a second rotating speed associated with the first acceleration fluctuation value from a preset dehydration rotating speed set, and controlling the drum to rotate at the second rotating speed.
For example, in an embodiment, when the laundry mass in the drum and/or the unbalance or eccentricity condition of the drum at the early stage of dehydration is determined, the dehydration rotation speed that the drum washing machine can adopt may be set accordingly. For example, the second rotation speed may be set to the drum as the spinning rotation speed according to a preset correspondence relationship (e.g., a correspondence relationship between the laundry mass and the spinning rotation speed, or a correspondence relationship between the degree of eccentricity and the spinning rotation speed).
In an embodiment, a control command may be sent to the motor, such as by the controller, to accelerate the drum from the first rotational speed to the second rotational speed at a preset acceleration. The preset acceleration may be a preset dehydration process acceleration of the drum washing machine in an embodiment. The acceleration may be a constant value, for example a constant value associated with the amount of laundry in the drum. The acceleration may also be a variable value, for example a value that is related to the amount of laundry in the drum and that varies with the rotation speed of the drum, for example, the acceleration becomes greater as the rotation speed of the drum increases.
S203, at least determining a second acceleration fluctuation value of the radial direction when the drum rotates at the second rotating speed.
In an embodiment, this step is similar to the implementation of S201.
And S204, controlling the drum to stop the dewatering process when the second acceleration fluctuation value is larger than a first preset threshold value.
Through the technical scheme, the unbalanced state is determined according to the acceleration fluctuation value of the radial direction in the dehydration process of the drum washing machine, the reasonable drum rotating speed can be set in the dehydration process of the drum washing machine, so that the drum washing machine is prevented from shaking and noise in the dehydration process, the dehydration process is stopped by controlling the threshold value when the drum washing machine is seriously unbalanced, the collision damage of mechanical parts in the washing machine can be prevented, and the service life of the washing machine is prolonged.
Fig. 3 is a flowchart of a spin-drying control method for a drum washing machine according to another exemplary embodiment of the present invention. Fig. 4 is a schematic diagram illustrating the relationship between the rotation speed and the time and the arrangement of the detection points in the dewatering control method for the drum washing machine according to the embodiment of the present invention. The principles of the present invention are described in further detail below in conjunction with fig. 3 and 4.
As shown in fig. 3, in an embodiment, the method may include: when it is judged in S309 that the second acceleration fluctuation value is less than or equal to a second preset threshold value F2Then, S310 may be executed, a third rotation speed is selected from the preset set of dehydration rotation speeds, and the drum is controlled to rotate at the third rotation speed to continue the dehydration process, wherein the third rotation speed is greater than the second rotation speed, and the second preset threshold F is set2Less than the first preset threshold F1。
In an embodiment, after the third rotation speed is selected, S311 may be performed to determine whether the third rotation speed is the maximum rotation speed of the drum washing machine. When it is determined that the third rotation speed is the maximum rotation speed, the above-mentioned determination process of the acceleration fluctuation value and the preset threshold value may not be performed any more, and the drum is directly controlled to rotate at the maximum rotation speed until it is determined at S313 that the dehydration reaches the preset time.
In an embodiment, the preset set of spin speeds may be set according to performance parameters of the drum washing machine. As shown in FIG. 4, exemplary sets of spin speeds may include 400rpm, 600rpm, 800rpm, and 1000 rpm. In an embodiment, the preset set of spin speeds may include any value of spin speed that may be reached during the spin process of the drum washing machine, for example, the spin speed at which the laundry may adhere to the inner wall of the drum and the maximum spin speed that the drum can reach.
Since the eccentric influence of the laundry on the drum as the dehydration process proceeds may vary according to the variation of moisture in the laundry. By the technical scheme, the acceleration fluctuation value is subjected to the second preset threshold value F in the dehydration process of the drum washing machine2Comparison of (2) canThe dewatering rotating speed can be increased under the condition that the drum washing machine is in a good balanced state, so that the dewatering efficiency of the drum washing machine is improved.
In the embodiment, when it is judged that the second acceleration fluctuation value is less than or equal to the first preset threshold F by the judgment steps S307 and S3091And is greater than the second preset threshold F2Then step 312 may be executed to control the drum to continue rotating at the second rotational speed. In an embodiment, the second acceleration fluctuation value is less than or equal to said first preset threshold F1And is greater than the second preset threshold F2In this case, it is considered that the eccentricity of the drum is substantially unchanged, and thus the second rotation speed can be continuously used to control the drum to dewater without speed reduction or speed increase.
In an embodiment, the first predetermined threshold F is determined at step S306 according to the rotation speed1And a second predetermined threshold F2May be associated with a second rotational speed. In other words, the first preset threshold F1And a second predetermined threshold F2Is associated with the current drum speed of the drum washing machine. Because the same eccentricity of the roller can cause different influences on the roller under different rotating speeds, the current roller balance state can be accurately judged by respectively setting and judging the preset threshold value of the eccentricity according to different rotating speeds.
In an embodiment, the first acceleration fluctuation value is a difference between a maximum value and a minimum value of the acceleration in the radial direction during one rotation of the drum at the first rotation speed; and the second acceleration fluctuation value is the difference value between the maximum value and the minimum value of the acceleration in the radial direction in the process that the roller rotates at the second rotating speed for one circle. The above acceleration fluctuation values can be calculated by equation (1) such as setting the acceleration value measured by the acceleration sensor of the drum washing machine outer tub.
In an embodiment, as shown in fig. 4, the method provided by the embodiment of the present invention may further include determining the first acceleration fluctuation value or the second acceleration fluctuation value after the drum rotates for a predetermined number of turns (or for a predetermined time). Through the arrangement, the drum of the drum washing machine can obtain the adjustment of a certain time or the number of turns when reaching a certain rotating speed, thereby eliminating the influence of speed change on the judgment of eccentricity or unbalance.
In an embodiment, the method further comprises: after the drum is controlled to stop the dehydrating process, a preset shaking-up operation (not shown) is performed. In a further embodiment, the method may further comprise: after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
In an embodiment, the shaking operation may employ a balancing technique available to the drum washing machine, such as reducing the rotation speed of the drum to redistribute the laundry in the drum, or feeding water into the drum to redistribute the laundry in the drum. In addition, the method may further include a warning step of warning the unbalance of the washing machine by sound, for example, after controlling the drum to stop.
Another aspect of the embodiments of the present invention provides a dehydration control apparatus for a drum washing machine, which can perform the dehydration control method for the drum washing machine provided by the above embodiments of the present invention.
Fig. 5 is a schematic diagram illustrating the composition of a dehydration control device of a drum washing machine according to an exemplary embodiment of the present invention. As shown in fig. 5, the dehydration control apparatus of a drum washing machine according to an embodiment of the present invention may include:
a controller 501 and an acceleration sensor 502 coupled to the controller 501, wherein the acceleration sensor 502 may be configured to measure a radial acceleration of the drum; and a controller 501, which may be configured to: acquiring a first acceleration fluctuation value of at least the drum radial direction from the acceleration sensor 502 while the drum is rotating at a first rotation speed; selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at the second rotation speed; acquiring a second acceleration fluctuation value of at least the radial direction from the acceleration sensor 502 while the drum is rotating at the second rotation speed; and controlling the drum to stop the dehydration process when the second acceleration fluctuation value is greater than a first preset threshold value.
In an embodiment, the controller 501 may also be configured to: and when the second acceleration fluctuation value is smaller than or equal to a second preset threshold value, selecting a third rotating speed from the preset dehydration rotating speed set, and controlling the roller to rotate at the third rotating speed, wherein the third rotating speed is greater than the second rotating speed, and the second preset threshold value is smaller than the first preset threshold value.
In an embodiment, the controller 501 may also be configured to: and when the second acceleration fluctuation value is smaller than or equal to the first preset threshold value and larger than the second preset threshold value, controlling the roller to continuously rotate at the second rotating speed.
In an embodiment, the controller 501 may acquire the rotation speed of the drum from the speed detector 503. In an embodiment, the speed detector 503 may be included in the above-mentioned dehydration control apparatus, and may also be provided in the drum washing machine.
In an embodiment, the first and second preset thresholds may be associated with a second rotational speed. The first acceleration fluctuation value may be a difference between a maximum value and a minimum value of the acceleration in the radial direction during one rotation of the drum at the first rotation speed; and the second acceleration fluctuation value may be a difference between a maximum value and a minimum value of the acceleration in the radial direction during one rotation of the drum at the second rotation speed.
In an embodiment, the controller 501 may also be configured to: acquiring the first acceleration fluctuation value or the second acceleration fluctuation value from the acceleration sensor after the drum rotates at the first rotation speed or the second rotation speed for a predetermined number of times.
Fig. 6 is a schematic diagram illustrating the components and the dehydration control principle of the drum washing machine according to an exemplary embodiment of the present invention. As shown in fig. 6, the controller 501 shown in fig. 5 may further include an unbalance detection section 605 and an unbalance processing section 604.
In an embodiment, the unbalance processing unit 604 may determine a dynamic unbalance state of the drum washing machine according to the drum radial direction acceleration and the drum rotation speed acquired by the unbalance detection unit 605, output a control signal according to the determination result, generate a command readable by the motor drive control unit 602 by the speed command generation unit 601, and control the operation of the motor 603 by the motor drive control unit 602.
In an embodiment, using the above-described control principle, the controller 501 may be further configured to perform a preset shaking-out operation after controlling the drum to stop the dehydration process. In further embodiments, the controller 501 may also be configured to: after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
In another aspect of embodiments of the present invention, there is provided a machine-readable storage medium having instructions stored thereon for causing a machine to perform the above-described drum washing machine control method.
In a further aspect of the embodiments of the present invention, there is provided a drum washing machine including the drum washing machine control device described above.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a (may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (18)
1. A dehydration control method of a drum washing machine is characterized by comprising the following steps:
determining at least a first acceleration fluctuation value of the drum in a radial direction while the drum is rotating at a first rotation speed;
selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at a preset acceleration increased along with the increase of the rotation speed of the drum;
determining at least a second acceleration fluctuation value of the radial direction while the drum is rotating at the second rotational speed; and
and when the second acceleration fluctuation value is larger than a first preset threshold value, controlling the roller to stop the dehydration process.
2. The method of claim 1, further comprising:
and when the second acceleration fluctuation value is smaller than or equal to a second preset threshold value, selecting a third rotating speed from the preset dehydration rotating speed set, and controlling the roller to rotate at the third rotating speed, wherein the third rotating speed is greater than the second rotating speed, and the second preset threshold value is smaller than the first preset threshold value.
3. The method of claim 2, further comprising:
and when the second acceleration fluctuation value is smaller than or equal to the first preset threshold value and larger than the second preset threshold value, controlling the roller to continuously rotate at the second rotating speed.
4. The method according to claim 2, characterized in that said first preset threshold and said second preset threshold are associated with said second rotation speed.
5. A method according to any of claims 1-4, wherein the first acceleration fluctuation value is the difference between the maximum value and the minimum value of the acceleration in the radial direction during one rotation of the drum at the first rotational speed; and the second acceleration fluctuation value is the difference value between the maximum value and the minimum value of the acceleration in the radial direction in the process that the roller rotates at the second rotating speed for one circle.
6. The method of claim 5, further comprising determining the first acceleration fluctuation value or the second acceleration fluctuation value after the drum is rotated at the first rotational speed or the second rotational speed for a predetermined number of turns.
7. The method of claim 1, further comprising:
and executing preset shaking operation after the roller is controlled to stop the dewatering process.
8. The method of claim 7, further comprising:
after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and
and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
9. A dehydration control device of a drum washing machine, characterized in that the device comprises:
a controller and an acceleration sensor coupled with the controller, wherein
The acceleration sensor is configured to measure the radial acceleration of the drum; and
the controller configured to:
acquiring a first acceleration fluctuation value of at least the drum in a radial direction from the acceleration sensor while the drum is rotating at a first rotational speed;
selecting a second rotation speed associated with the first acceleration fluctuation value from a preset dehydration rotation speed set, and controlling the drum to rotate at a preset acceleration increased along with the increase of the rotation speed of the drum;
acquiring a second acceleration fluctuation value of at least the radial direction from the acceleration sensor while the drum is rotating at the second rotation speed; and
and when the second acceleration fluctuation value is larger than a first preset threshold value, controlling the roller to stop the dehydration process.
10. The apparatus of claim 9, wherein the controller is further configured to:
and when the second acceleration fluctuation value is smaller than or equal to a second preset threshold value, selecting a third rotating speed from the preset dehydration rotating speed set, and controlling the roller to rotate at the third rotating speed, wherein the third rotating speed is greater than the second rotating speed, and the second preset threshold value is smaller than the first preset threshold value.
11. The apparatus of claim 10, wherein the controller is further configured to:
and when the second acceleration fluctuation value is smaller than or equal to the first preset threshold value and larger than the second preset threshold value, controlling the roller to continuously rotate at the second rotating speed.
12. The apparatus of claim 10, wherein the first and second preset thresholds are associated with the second rotational speed.
13. The apparatus according to any one of claims 9-12, wherein the first acceleration fluctuation value is a difference between a maximum value and a minimum value of acceleration in a radial direction during one rotation of the drum at the first rotation speed; and the second acceleration fluctuation value is the difference value between the maximum value and the minimum value of the acceleration in the radial direction in the process that the roller rotates at the second rotating speed for one circle.
14. The apparatus of claim 13, wherein the controller is further configured to: acquiring the first acceleration fluctuation value or the second acceleration fluctuation value from the acceleration sensor after the drum rotates at the first rotation speed or the second rotation speed for a predetermined number of times.
15. The apparatus of claim 9, wherein the controller is further configured to:
and executing preset shaking operation after the roller is controlled to stop the dewatering process.
16. The apparatus of claim 15, wherein the controller is further configured to:
after the preset shaking-up operation is executed once, the roller is rotated at the first rotating speed again to perform a dehydration process; and
and controlling the roller to stop after the preset shaking operation is executed for a preset number of times.
17. A machine-readable storage medium having stored thereon instructions for causing a machine to perform the method of any one of claims 1-8.
18. A drum washing machine characterized in that it comprises a device according to any one of claims 9 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401208.8A CN107201626B (en) | 2017-05-31 | 2017-05-31 | Drum washing machine and dehydration control method and device thereof and machine readable storage medium |
Applications Claiming Priority (1)
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| JP7100839B2 (en) * | 2017-11-21 | 2022-07-14 | 青島海爾洗衣机有限公司 | Drum type washing machine |
| CN108486825B (en) * | 2018-04-23 | 2020-11-10 | 海信（山东）冰箱有限公司 | Washing machine control method and device |
| CN109468800B (en) * | 2018-12-11 | 2022-06-28 | 佛山市顺德海尔电器有限公司 | Dewatering rotating speed control method of washing equipment |
| CN110273260B (en) * | 2019-07-02 | 2021-08-20 | 上海景能电气有限公司 | Non-sensing drum washing machine eccentricity and weighing-based acquisition method |
| CN113265841A (en) * | 2021-05-28 | 2021-08-17 | 海信（山东）冰箱有限公司 | Washing machine tub collision detection method and device, medium and washing machine |
| CN113605042B (en) * | 2021-08-25 | 2023-06-27 | 四川虹美智能科技有限公司 | Dewatering method and system for washing machine |
| CN113605043B (en) * | 2021-08-25 | 2023-06-27 | 四川虹美智能科技有限公司 | Dewatering method and system for washing machine |
| CN114232272B (en) * | 2021-12-11 | 2022-12-23 | 珠海格力电器股份有限公司 | Control method for drying down jackets and washing machine |
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