CN113622140A - Washing machine dehydration control method and washing machine - Google Patents
Washing machine dehydration control method and washing machine Download PDFInfo
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- CN113622140A CN113622140A CN202110887355.7A CN202110887355A CN113622140A CN 113622140 A CN113622140 A CN 113622140A CN 202110887355 A CN202110887355 A CN 202110887355A CN 113622140 A CN113622140 A CN 113622140A
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- washing machine
- eccentricity
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- 230000018044 dehydration Effects 0.000 title claims abstract description 83
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 83
- 238000005406 washing Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000001133 acceleration Effects 0.000 claims abstract description 11
- 238000012937 correction Methods 0.000 claims description 88
- 238000001514 detection method Methods 0.000 abstract description 14
- 238000005303 weighing Methods 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 208000005156 Dehydration Diseases 0.000 description 52
- 238000013507 mapping Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention belongs to the field of washing machines, and particularly relates to a dewatering control method of a washing machine and the washing machine, wherein the control method comprises the following steps: after entering a dehydration process, acquiring an eccentric value Pi of the washing machine at a set rotating speed; acquiring a target rotating speed of a current load, controlling the washing machine to increase the speed from a set rotating speed to the target rotating speed at a set acceleration, and calculating a motor torque coefficient t when the speed is increased from the set rotating speed to the target rotating speed; and fitting the torque coefficient t with the eccentricity value Pi to obtain a corrected eccentricity value P, and controlling the washing machine to carry out dehydration control according to the corrected eccentricity value P. According to the dehydration control method, the eccentricity threshold is set according to the weighing in the dehydration process by adding the eccentricity compensation in the eccentricity detection process, the eccentricity threshold is directly set, the displacement probability of a collision barrel is reduced, the dehydration performance is improved, and the leveling process caused by uneven clothes is reduced.
Description
Technical Field
The invention belongs to the field of washing machines, and particularly relates to a washing machine dehydration control method and a washing machine.
Background
Most of the washing machines on the market at present adopt a PMSM motor for control, and in order to detect eccentricity generated by uneven distribution of clothes in the washing machine, each semaphore of the motor is detected for carrying out eccentricity mapping. Therefore, the mapping eccentricity is in direct proportion to the swinging of the roller, and the basic requirement for detecting the eccentricity is met.
In the actual operation process, the eccentric mapping amount under different clothes weights is different, threshold setting of different eccentric mapping parameters is needed in each load stage, the control reliability of eccentricity is related to the accuracy of clothes weight detection, the threshold will be changed when the weight is deviated, the whole machine operation phenomenon caused by the change is barrel collision displacement or long dehydration time, and partial conditions are not dehydrated.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a dehydration control method and a washing machine, wherein the eccentricity compensation is added in the eccentricity detection process to cancel the eccentricity threshold value set according to the weighing in the dehydration process.
In order to solve the above technical problem, the present invention provides a dehydration control method of a washing machine, the control method comprising:
after the dewatering process is carried out, the eccentricity value P i of the washing machine at the set rotating speed is obtained;
acquiring a target rotating speed of a current load, controlling the washing machine to increase the speed from a set rotating speed to the target rotating speed at a set acceleration, and calculating a motor torque coefficient t when the speed is increased from the set rotating speed to the target rotating speed;
and fitting the torque coefficient t with the eccentricity value Pi to obtain a corrected eccentricity value P, and controlling the washing machine to carry out dehydration control according to the corrected eccentricity value P.
Further optionally, the obtaining of the target rotation speed of the current load comprises
Acquiring a weight value of a load, and determining a weight range in which the current load weight is located according to a preset corresponding relation between a weight value range and a target rotating speed;
and determining the target rotating speed of the current load according to the target rotating speed corresponding to the weight range.
Further optionally, the calculating the motor torque coefficient t when the set rotation speed is increased to the target rotation speed comprises
Obtaining the motor torque value X when the washing machine starts to accelerate from the set rotating speed0；
Obtaining a motor torque value X when the washing machine is accelerated to a target rotating speed from a set rotating speedm；
Obtaining the average value of the motor torque of every accelerated circle in the process of accelerating from the set rotating speed to the target rotating speed
Calculating a motor torque coefficient t, wherein the motor torque coefficient t satisfies the following conditions:
and m is a data acquisition period.
Further optionally, the corrected eccentricity value P satisfies: p ═ t × Pi。
Further optionally, after obtaining the corrected eccentricity value P, a correction deviation k is also calculated, and whether the current eccentricity correction result meets the high-speed dehydration condition is determined according to the magnitude of the correction deviation k.
Further optionally, the correction offset k satisfies:
where P is the corrected eccentricity value, P i is the eccentricity value obtained during the correction process, and i is the number of corrections.
Further optionally, the determining whether the current eccentricity correction result satisfies the high-speed dehydration condition according to the magnitude of the correction deviation k includes:
when the correction coefficient k is smaller than or equal to the set deviation, judging that the current eccentricity correction result accords with the high-speed dehydration condition, and controlling the washing machine to carry out high-speed dehydration according to the current eccentricity correction result;
and when the correction coefficient k is larger than the set deviation, judging that the current eccentricity correction result does not accord with the high-speed dehydration condition, redistributing the load and then performing eccentricity correction again until the correction deviation is smaller than or equal to the set deviation.
Further optionally, controlling the washing machine to perform high-speed dehydration according to the current correction result, including
Determining the eccentric range in the preset corresponding relation of the corrected eccentric value according to the preset corresponding relation of the eccentric range and the dehydration rotating speed;
determining a target rotating speed for high-speed dehydration of the current load according to the dehydration rotating speed corresponding to the eccentricity range;
and controlling the washing machine to increase the speed to the target rotating speed for high-speed dehydration.
Further optionally, when the eccentricity correction result does not meet the high-speed dehydration condition, determining a maximum correction time n allowing eccentricity correction according to the correction deviation k, controlling the correction time of the washing machine for carrying out eccentricity correction again within the maximum correction time n, and when the maximum eccentricity correction time is reached and the high-speed dehydration condition cannot be met, controlling the washing machine to stop.
Further optionally, the maximum correction number n is an integer value obtained by dividing the eccentricity coefficient k by a set deviation.
The invention also provides a washing machine which adopts any one of the dehydration control methods.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
in the existing eccentricity detection process, the method for setting the eccentricity threshold value according to the weighing in the dehydration process is cancelled by adding the eccentricity detection compensation, the eccentricity threshold value is directly set, the displacement probability of the collision barrel is reduced, the dehydration performance is improved, and the leveling process caused by the uneven clothes is reduced.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: the eccentric correction control flow chart of the embodiment of the invention is shown.
FIG. 2: the data distribution diagram of the detected eccentricity values under different eccentricity masses before eccentricity correction of the embodiment of the invention is shown.
FIG. 3: the data of the detected eccentric value under different eccentric masses after eccentric correction is divided into a chart.
FIG. 4: is a dehydration graph of an embodiment of the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The washing machine needs to carry out eccentricity detection before carrying out high-speed dehydration, the high-speed dehydration is carried out when the eccentricity detection result meets the high-speed dehydration condition, because the eccentricity mapping amount under different clothes weights is different, the threshold setting of different eccentricity mapping parameters is needed in each load stage, the eccentricity control reliability is related to the accuracy of the clothes weight detection, when the load weight is deviated, the threshold is changed, the whole machine operation phenomenon caused by the change is barrel collision displacement or long dehydration time, and partial conditions are not dehydrated, in order to solve the technical problems, the embodiment provides a dehydration control method of the washing machine, and the control method comprises the following steps:
after entering a dehydration process, acquiring an eccentric value Pi of the washing machine at a set rotating speed;
acquiring a target rotating speed of a current load, controlling the washing machine to increase the speed from a set rotating speed to the target rotating speed at a set acceleration, and calculating a motor torque coefficient t when the speed is increased from the set rotating speed to the target rotating speed;
and fitting the torque coefficient t with the eccentricity value Pi to obtain a corrected eccentricity value P, and controlling the washing machine to carry out dehydration control according to the corrected eccentricity value P.
Specifically, as shown in the flowchart of fig. 1, in the dehydration stage of the washing machine, a motor eccentricity detection rotation speed n is given, when eccentricity calculation is completed, acceleration is performed at an acceleration a at the rotation speed n, and a torque coefficient value t in the process is calculated after the speed is accelerated to a target rotation speed. Wherein the obtaining of the target rotation speed comprises: acquiring a weight value of a load, and determining a weight range in which the current load weight is located according to a preset corresponding relation between a weight value range and a target rotating speed; and determining the target rotating speed of the current load according to the target rotating speed corresponding to the weight range.
The motor torque coefficient t satisfies:
X0is the torque value at the start of acceleration; xmIs the torque value at the end of acceleration;
average value of each acceleration circle; m is a data acquisition period, and each data acquisition period is a period in the same time. The corrected eccentricity value P satisfies: p ═ t × Pi。
The torque coefficient t value is used as an eccentricity compensation coefficient for correcting the eccentricity parameter. In the existing eccentricity detection process, the method for setting the eccentricity threshold value according to weighing in the dehydration process is cancelled by adding the eccentricity detection compensation, the eccentricity threshold value is directly set, the displacement probability of the collision barrel is reduced, the dehydration performance is improved, and the leveling process caused by uneven clothes is reduced.
Further alternatively, as shown in the control flowchart of fig. 1, after obtaining the corrected eccentricity value P, a correction deviation k is also calculated, and whether the current eccentricity correction result meets the high-speed dehydration condition is determined according to the magnitude of the correction deviation k. Wherein the correction deviation k satisfies:
wherein P is the corrected eccentricity value, pi is the eccentricity value obtained in the correction process, and i is the correction times.
When the correction coefficient k is smaller than or equal to the set deviation, judging that the current eccentricity correction result accords with the high-speed dehydration condition, and controlling the washing machine to carry out high-speed dehydration according to the current eccentricity correction result; and when the correction coefficient k is larger than the set deviation, judging that the current eccentricity correction result does not accord with the high-speed dehydration condition, redistributing the load and then performing eccentricity correction again until the correction deviation is smaller than or equal to the set deviation. And when the eccentricity correction result does not meet the high-speed dehydration condition, determining the maximum correction times n allowing eccentricity correction according to the correction deviation k, controlling the correction times of the washing machine for carrying out eccentricity correction again within the maximum correction times n, and controlling the washing machine to stop when the maximum eccentricity correction times still cannot meet the high-speed dehydration condition. The maximum correction number n is an integer value obtained by dividing the eccentricity coefficient k by a set deviation.
The deviation is set as the error accuracy of the system, which determines the correction accuracy of the eccentricity and the vibration deviation according to the rotation speed after the acceleration of the eccentricity. The adjustment of the magnitude of the set deviation will improve or reduce the accuracy of the eccentricity correction. According to the actual condition of the system, the band under the set deviation can be adjusted to be matched with the system, so that the function and the system are optimally combined. And if the newly calculated correction deviation is larger than the set deviation, calculating the maximum correction times according to the newly calculated correction deviation.
Further optionally, controlling the washing machine to perform high-speed dehydration according to the current correction result, including
Determining the eccentric range in the preset corresponding relation of the corrected eccentric value according to the preset corresponding relation of the eccentric range and the dehydration rotating speed;
determining a target rotating speed for high-speed dehydration of the current load according to the dehydration rotating speed corresponding to the eccentricity range;
and controlling the washing machine to increase the speed to the target rotating speed for high-speed dehydration.
And when the corrected eccentricity value reaches the high-speed dewatering condition, controlling the dewatering rotating speed according to the eccentricity value. By this eccentricity correction, when setting the threshold value, it is only necessary to set the threshold value in accordance with the eccentricity. The classification of the threshold value is performed without increasing the weighing. The absolute detection of eccentric unbalance is realized, and the accuracy and the control reliability of eccentric detection are improved.
Fig. 2 is a data distribution diagram of eccentricity values corresponding to different eccentric masses before eccentricity correction, and fig. 3 is a data distribution diagram of eccentricity values corresponding to different eccentric masses after eccentricity correction. Before the eccentricity correction, the eccentric values corresponding to different eccentric masses are larger or smaller than the ideal eccentric value, and the eccentric values corresponding to different eccentric masses after the eccentricity correction coincide with the ideal eccentric data, which shows that the embodiment can make the corrected eccentric values located on the ideal eccentric data under the corresponding eccentric masses by increasing the eccentric correction, so that the corresponding dehydration rotating speed can be set by directly adopting the eccentric threshold value, and the method of setting the eccentric threshold value according to the weighing is cancelled, thereby avoiding the situation that the barrel is collided and shifted or the dehydration time is long due to the change of the threshold value caused by the deviation in the weighing, and even the dehydration is not performed. And the corrected eccentric parameters are positioned on the ideal eccentric data of the eccentric weight, so that the control deviation is greatly reduced, and the eccentric control is more reliable.
FIG. 4 is a graph of the dehydration curve for an embodiment of the present invention. As can be seen from fig. 4, the washing machine is accelerated from a stationary state to a set rotation speed, then eccentricity detection is performed to obtain an initial eccentricity value, then the washing machine is accelerated at the set rotation speed with a set acceleration, and after the washing machine is accelerated to a target rotation speed (i.e. a peak value in fig. 4), a motor torque coefficient t is calculated, and the eccentricity value is corrected according to the motor torque coefficient t. Optionally, in the present embodiment, the motor torque coefficient t is obtained twice to ensure the accuracy of the data. And when the corrected eccentricity value meets the high-speed dehydration condition, the washing machine is accelerated to the dehydration rotating speed corresponding to the eccentricity range in which the corrected eccentricity value is positioned, and high-speed dehydration is carried out.
The present embodiment also proposes a washing machine that employs the dehydration control method of any one of the above.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A dehydration control method of a washing machine, characterized in that the control method comprises:
after entering a dehydration process, acquiring an eccentric value Pi of the washing machine at a set rotating speed;
acquiring a target rotating speed of a current load, controlling the washing machine to increase the speed from a set rotating speed to the target rotating speed at a set acceleration, and calculating a motor torque coefficient t when the speed is increased from the set rotating speed to the target rotating speed;
and fitting the torque coefficient t with the eccentricity value Pi to obtain a corrected eccentricity value P, and controlling the washing machine to carry out dehydration control according to the corrected eccentricity value P.
2. The dehydration control method of a washing machine according to claim 1, wherein said obtaining a target rotation speed of a current load comprises
Acquiring a weight value of a load, and determining a weight range in which the current load weight is located according to a preset corresponding relation between a weight value range and a target rotating speed;
and determining the target rotating speed of the current load according to the target rotating speed corresponding to the weight range.
3. The dehydration control method of a washing machine according to claim 2, wherein said calculating a motor torque coefficient t at the time of increasing from a set rotation speed to a target rotation speed comprises
Obtaining the motor torque value X when the washing machine starts to accelerate from the set rotating speed0；
Obtaining a motor torque value X when the washing machine is accelerated to a target rotating speed from a set rotating speedm；
Obtaining the average value of the motor torque of every accelerated circle in the process of accelerating from the set rotating speed to the target rotating speed
Calculating a motor torque coefficient t, wherein the motor torque coefficient t satisfies the following conditions:
and m is a data acquisition period.
4. A dehydration control method of a washing machine according to claim 3, wherein the corrected eccentricity value P satisfies: p ═ t × Pi。
5. The dehydration control method of a washing machine according to any one of claims 1-4, wherein after obtaining the corrected eccentricity value P, a correction deviation k is further calculated, and it is determined whether the current eccentricity correction result satisfies the high-speed dehydration condition according to the magnitude of the correction deviation k.
6. The dehydration control method of a washing machine according to claim 5, wherein the correction deviation k satisfies:
wherein P is the corrected eccentricity value, pi is the eccentricity value obtained in the correction process, and i is the correction times.
7. The dehydration control method of a washing machine according to claim 6, wherein said determining whether the current eccentricity correction result satisfies the high-speed dehydration condition according to the magnitude of the correction deviation k comprises:
when the correction coefficient k is smaller than or equal to the set deviation, judging that the current eccentricity correction result accords with the high-speed dehydration condition, and controlling the washing machine to carry out high-speed dehydration according to the current eccentricity correction result;
and when the correction coefficient k is larger than the set deviation, judging that the current eccentricity correction result does not accord with the high-speed dehydration condition, redistributing the load and then performing eccentricity correction again until the correction deviation is smaller than or equal to the set deviation.
8. The dehydration control method of claim 7, wherein controlling the washing machine to perform high-speed dehydration according to the current correction result comprises
Determining the eccentric range in the preset corresponding relation of the corrected eccentric value according to the preset corresponding relation of the eccentric range and the dehydration rotating speed;
determining a target rotating speed for high-speed dehydration of the current load according to the dehydration rotating speed corresponding to the eccentricity range;
and controlling the washing machine to increase the speed to the target rotating speed for high-speed dehydration.
9. The dehydration control method of a washing machine according to claim 7, wherein when the eccentricity correction result does not meet the high-speed dehydration condition, a maximum correction number n of times of allowing eccentricity correction is further determined according to the magnitude of the correction deviation k, and the correction number of times of re-eccentricity correction of the washing machine is controlled within the maximum correction number n, and when the maximum eccentricity correction number is reached, the condition of high-speed dehydration is not satisfied, the washing machine is controlled to stop.
10. The dehydration control method of a washing machine according to claim 8, wherein said maximum number of corrections n is an integer value obtained by dividing a correction deviation k by a set deviation.
11. A washing machine characterized by employing the dehydration control method according to any one of claims 1 to 10.
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| CN113957659A (en) * | 2021-12-07 | 2022-01-21 | 四川虹美智能科技有限公司 | Weighing method and device of drum washing machine and drum washing machine |
| CN114164608A (en) * | 2021-12-13 | 2022-03-11 | 珠海格力电器股份有限公司 | Washing machine dehydration method and device, storage medium and washing machine |
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