CN113235267A - Washing machine dehydration control method and device and washing machine - Google Patents
Washing machine dehydration control method and device and washing machine Download PDFInfo
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- CN113235267A CN113235267A CN202110461624.3A CN202110461624A CN113235267A CN 113235267 A CN113235267 A CN 113235267A CN 202110461624 A CN202110461624 A CN 202110461624A CN 113235267 A CN113235267 A CN 113235267A
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- 238000005406 washing Methods 0.000 title claims abstract description 184
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 169
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- 238000011897 real-time detection Methods 0.000 abstract description 3
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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
- D06F34/04—Signal transfer or data transmission arrangements
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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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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses a dewatering control method and device of a washing machine and the washing machine under the condition of distinguishing load inertia, the judgment of the load eccentricity of the washing machine is realized by detecting the current vibration displacement of the outer drum of the washing machine in a low-speed area, the vibration acceleration of the outer drum of the washing machine is detected in a high-speed area to realize real-time detection of the vibration condition of the washing machine, thereby carrying out real-time rotation speed control and vibration protection, accurately obtaining the load eccentricity and the current acceleration condition of the washing machine when the dehydration barrel is dehydrating, thereby accurately knowing the real-time vibration condition of the washing machine, controlling the rotating speed and protecting the vibration according to the real-time vibration condition, effectively reducing the vibration and noise of the washing machine during low-speed rotation and high-speed rotation, therefore, the dewatering effect can be improved, the problems of large vibration and large noise of the washing machine during dewatering can be effectively solved, and the development of the washing machine industry is promoted.
Description
Technical Field
The invention relates to the technical field of washing appliances, in particular to a washing machine dehydration control method and device and a washing machine.
Background
The problem of uneven distribution of the washings is easy to occur due to the inconsistency of the water absorption capacity and the material of the washings in the use process of the washing machine. The uneven distribution of the washings can cause the rotating shaft of the washing machine to deviate from the central position, the outer barrel can collide the box body or the control rod when the washing machine operates in an eccentric state, vibration or noise is generated, and even the problems of movement, jumping or damage of the washing machine can occur when the eccentricity is serious.
Therefore, the eccentricity detection of the washing machine is critical in the dehydration process, and the existing dehydration control method of the washing machine cannot accurately adjust the rotating speed of the washing machine during dehydration due to the fact that the eccentricity cannot be accurately detected, so that vibration or noise of the washing machine can be generated frequently, smooth dehydration of the washing machine is greatly limited, and the development of the industry of the washing machine is influenced.
Disclosure of Invention
The present invention is intended to solve the above-mentioned technical problems. Therefore, an object of the present invention is to provide a dehydration control method, a dehydration control device and a washing machine, which can effectively reduce vibration and noise during dehydration of the washing machine, thereby improving dehydration effect.
In order to solve the technical problems, the technical solution of the invention is as follows:
one embodiment of the present invention provides a dehydration control method of a washing machine, including the steps of:
when a dehydration program is executed, acquiring the dehydration rotating speed of a dehydration barrel in real time, and determining that the current dehydration program is in a low rotating speed stage or a high rotating speed stage according to the dehydration rotating speed;
in the low-rotation-speed stage of a dehydration program, acquiring the vibration displacement of the dehydration barrel and the load inertia of the clothes, and adjusting the dehydration rotation speed according to the numerical relationship between the vibration displacement and the displacement threshold value and the load inertia of the clothes;
and in the high-rotation-speed stage of the dehydration program, acquiring the vibration acceleration of the dehydration barrel, and adjusting the dehydration rotation speed according to the numerical relation between the vibration acceleration and the acceleration threshold value.
According to an aspect of the embodiment of the present application, the method for adjusting the spinning speed according to the numerical relationship between the vibration displacement and the displacement threshold and the load inertia of the laundry includes:
acquiring the current vibration displacement;
if the current vibration displacement is larger than the vibration displacement threshold, reducing the rotation speed of the dehydration barrel, and controlling the dehydration barrel to shake up and distribute the clothes;
and if the current vibration displacement is smaller than or equal to the vibration displacement threshold, determining the eccentricity of the washing machine according to the load inertia and the current vibration displacement, and increasing the rotating speed according to the eccentricity of the washing machine to reach the target rotating speed of the dewatering barrel.
According to an aspect of the embodiment of the application, in the high rotation speed stage of the dehydration program, the method for adjusting the dehydration rotation speed according to the numerical relation between the vibration acceleration and the acceleration threshold value comprises the following steps:
acquiring current vibration acceleration;
if the current vibration acceleration is larger than the acceleration threshold, reducing the rotating speed of the dehydration barrel to realize that the current vibration acceleration is smaller than the acceleration threshold;
and if the current vibration acceleration is smaller than or equal to the acceleration threshold, increasing the rotating speed of the dehydration barrel to reach the target rotating speed of the dehydration barrel.
According to an aspect of an embodiment of the application, the method further comprises:
acquiring the current number of times of the dehydration attempt, wherein the number of times of the dehydration attempt is determined according to the number of times of restarting the dehydration program when the vibration displacement is larger than the displacement threshold;
and if the current dehydration attempt times are more than or equal to the maximum set times of dehydration, performing dehydration incapability alarm, and if the current dehydration attempt times are less than the maximum set times of dehydration, gradually increasing the rotating speed of the dehydration barrel.
According to an aspect of an embodiment of the present application, in a low rotation speed stage of a spin-drying program, after controlling a spin-drying tub to shake apart and distribute laundry, a current spin-drying attempt number is increased by 1, and the method of decreasing the rotation speed of the spin-drying tub includes: the rotation speed of the dewatering barrel is reduced to zero.
According to an aspect of an embodiment of the present application, a method of determining whether a current spinning program is in a low spinning stage or a high spinning stage according to a spinning speed of a spinning tub includes:
if the rotating speed of the dewatering barrel is less than the designated detection speed, determining that the dewatering process is in a low rotating speed stage at present; and if the rotating speed of the dewatering barrel is greater than or equal to the specified detection speed, determining that the spinning machine is in a high rotating speed stage of the dewatering program at present.
According to an aspect of an embodiment of the present application, a method of increasing a rotational speed according to an eccentricity amount includes:
judging the size interval of the eccentric amount;
if in the small eccentric interval, setting the target rotating speed as the highest rotating speed;
if the target rotating speed is set to be the second highest rotating speed in the medium eccentric interval, the speed value of the highest rotating speed is smaller than the second highest rotating speed;
if the target rotating speed is set to be the third highest rotating speed in the large eccentric interval, the speed value of the second highest rotating speed is smaller than the third highest rotating speed.
According to an aspect of an embodiment of the present application, the acceleration threshold is determined according to a maximum eccentricity allowable by the washing machine at different load inertias and different maximum rotation speeds.
Another embodiment of the present invention provides a dehydration controlling apparatus of a washing machine, including:
the acquisition module is used for acquiring the rotating speed, the current vibration displacement and the current vibration acceleration of a dewatering barrel of the washing machine in real time when the washing machine executes a dewatering program;
and the main control module is connected with the acquisition module and used for receiving the data acquired by the acquisition module and executing the washing machine dehydration control method so as to generate a dehydration control signal according to the data.
And the motor control module is respectively connected with the main control module and the motor of the dewatering barrel and used for receiving the dewatering control signal and controlling the rotating speed of the dewatering barrel according to the dewatering control signal to drive the motor of the dewatering barrel to rotate.
Another embodiment of the present invention provides a washing machine, and a dehydration control method using the above washing machine.
The invention has the beneficial effects that:
the invention realizes the judgment of the load eccentricity of the washing machine by detecting the current vibration displacement of the outer cylinder of the washing machine in a low-speed area under the condition of distinguishing the load inertia, and detects the vibration acceleration of the outer cylinder of the washing machine in a high-speed area to realize the real-time detection of the vibration condition of the washing machine, thereby carrying out the real-time rotating speed control and vibration protection and effectively reducing the vibration noise of the washing machine.
Drawings
Fig. 1 is a flowchart of a dehydration control method of a washing machine according to an embodiment of the present invention;
FIG. 2 is a block diagram illustrating a dehydration control method of a washing machine, according to an embodiment of the present invention;
FIG. 3 is a block diagram illustrating a dehydration control apparatus of a washing machine according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a washing machine operating according to an embodiment of the present invention.
In the figure: 10-an acquisition module; 20-a main control module; 30-a motor control module; 1-a window; 2-door sealing; 3-outer cylinder; 4-inner cylinder; 5-a box body; 6-a vibration sensor; 7-hanging spring; 8, a motor; 9-a shock absorber;
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be noted that the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the dewatering process of the washing machine, the eccentricity of the washing machine needs to be detected, and then the rotating speed of the washing machine is adjusted according to the eccentricity so as to solve the problems, while the eccentricity detection mode 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, the detection method has several problems in the actual use process, firstly, under the condition that the clothes load of the washing machine is more, the clothes load can not be well attached to the inner cylinder wall of the washing machine, and the clothes load is washed to discharge water under the action of centrifugal force along with the increase of the dehydration rotating speed of the washing machine, so that the eccentric condition of the clothes load is changed in the dehydration process of the clothes load, the detection is inaccurate, and the rotating speed of the washing machine can not be accurately adjusted due to the inaccurate detection, so that the outer barrel can be collided with the box body or the control rod, and the vibration is generated. Secondly, the eccentricity detection rotating speed of the washing machine is low, the detection difficulty of the complex eccentricity condition of the clothes load is high, and when the eccentricity detection of the clothes load has large deviation, the problem of large vibration noise of the washing machine can be caused. Thirdly, because the eccentricity is detected inaccurately in the low-speed state, the acceleration threshold value is inaccurate when the washing machine dehydrates in the high-speed state, so that the washing machine can not accurately adjust the rotating speed in the high-speed state, and the high-speed state noise is also caused.
Before further explanation of the present application, some relevant concepts will first be explained.
Inertia is the inertia magnitude of the motion of a substance (object), is a physical quantity of the inertia magnitude, and the inertia magnitude and the corresponding inertia J ═ r ^2dm of the mass of the substance, wherein r is a rotation radius, and m is the rigid mass inertia, and is also an important index of the servo motor. It refers to the inertia of the rotor itself, which is important for the acceleration and deceleration of the motor.
The primary load affecting the response of the servo motor is the load inertia. The servo motor driver controls the response of the servo motor, and the optimal value is that the ratio of the load inertia to the motor rotor inertia is one, and the maximum value cannot exceed five times. By the design of the mechanical transmission device, the ratio of the load inertia to the motor rotor inertia can be close to one or smaller. When the load inertia is indeed so large that the mechanical design cannot make the ratio of the load inertia to the motor rotor inertia less than five times, a motor with a large motor rotor inertia, a so-called high inertia motor, can be used. With a large inertia motor, the capacity of the drive should be larger to achieve a certain response. Therefore, the index of the load inertia has a large influence on the servo motor driver.
The washing machine also needs to use a servo motor, and the load inertia of the washing machine has great influence on the control of the washing machine dehydration, the vibration displacement, the eccentricity, the acceleration and the like during the dehydration in the dehydration process of the washing machine. Therefore, two different methods are often used in performing eccentricity detection and dehydration control of the washing machine: the first is to perform eccentricity detection and washing machine dehydration control in a case where load inertia needs to be discriminated, and the second is to perform eccentricity detection and washing machine dehydration control in a case where load inertia does not need to be discriminated. The main differences between the two are: first, because the load inertia needs to be distinguished, and the value of the load inertia is constantly changed in the dehydration process of the washing machine, the corresponding vibration displacement, eccentricity and acceleration during dehydration are changed at any time, the detection of the eccentricity of the washing machine, the control of the rotating speed and the vibration protection requirements are higher, the calculation and the detection are more complicated, therefore, the control method of the washing machine for distinguishing the load inertia is relatively complicated and is more close to the actual use effect of the washing machine, but because the complexity is not good for the unification of various standards, when the washing machine is tested, the condition that the load inertia is not distinguished is generally used, and by utilizing the dehydration control of the washing machine under the condition that the load inertia is not distinguished, the specification and various data of each washing machine can be effectively tested to be in accordance with the standards, therefore, the two methods are often used in various different conditions, the application discloses a dehydration control method and device of a washing machine and the washing machine, which aim at the practical dehydration application condition of the washing machine and are carried out in a more complex manner.
The following describes a dehydration control method and device for a washing machine and a washing machine according to an embodiment of the present invention with reference to the accompanying drawings.
An embodiment of the present invention provides a dehydration control method for a washing machine, as shown in the flowchart of fig. 1, which specifically includes the following steps:
s1: when a dehydration program is executed, acquiring the dehydration rotating speed of a dehydration barrel in real time, and determining that the current dehydration program is in a low rotating speed stage or a high rotating speed stage according to the dehydration rotating speed;
in one embodiment of the present application, a method of determining whether a current spinning program low speed stage or a spinning program high speed stage is in accordance with a spinning speed of a spinning tub includes: if the rotating speed of the dehydration barrel is less than the designated detection speed S, determining that the current dehydrating program is in a low rotating speed stage; if the rotating speed of the dewatering barrel is larger than or equal to the designated detection speed S, the current high rotating speed stage of the dewatering program is determined, wherein the designated detection speed S is a preset value, the value can be adjusted according to different types and models of washing machines, and the detection speed S is set to be 400rpm for most washing machines.
S2: in the low-rotation-speed stage of a dehydration program, acquiring the vibration displacement of the dehydration barrel and the load inertia of the clothes, and adjusting the dehydration rotation speed according to the numerical relationship between the vibration displacement and the displacement threshold value and the load inertia of the clothes;
in one embodiment of the application, in the low-speed stage of the dehydration program, the method for adjusting the dehydration speed according to the numerical relationship between the vibration displacement and the displacement threshold and the load inertia of the clothes comprises the following steps: obtaining the current vibration displacement, and if the current vibration displacement is larger than a vibration displacement threshold, reducing the rotating speed of the dehydration barrel;
the load inertia of the clothes is calculated according to the mass of the clothes, the load inertia of the clothes in the washing machine can be identified according to the fluctuation of the rotating speed or the sudden change of the vibration displacement of the washing machine, typical load inertia of the clothes can be divided into small, medium, large and overlarge loads, and different load inertia can correspond to different dehydration curve processes. The vibration displacement is detected by a vibration sensor, and if the current vibration displacement is larger than a vibration displacement threshold value, the rotating speed of the dewatering barrel is reduced, in one embodiment of the application, the rotating speed of the dewatering barrel is reduced until the rotating speed is reduced to zero generally, namely, the rotation is stopped, and the dewatering barrel is controlled to shake, scatter and distribute the clothes; this step also increases the current number of attempts to dewater by 1, and then returns to step S1 to restart the dewatering process. In one embodiment of the present application, the vibration displacement threshold of the present application is obtained according to a maximum eccentricity test allowed by the washing machine in a low-speed stage; the vibration displacement threshold is also a preset value defined according to the specification and model of the washing machine, the maximum eccentric amount allowed in the low-speed stage of the washing machine with different specifications is different, the washing machine is tested in advance when the washing machine is put into use, the main test is the maximum eccentric amount allowed in the low-speed stage, and the vibration displacement threshold is calculated according to the maximum eccentric amount allowed in the low-speed stage. According to the control method corresponding to the application, in the low-rotation-speed stage of the dehydration program, the current vibration displacement is larger than the vibration displacement threshold, so that the rotation speed of the washing machine can be reduced in order to avoid the generation of vibration and noise in an overrun state, and meanwhile, the clothes are shaken up and distributed again and dehydrated again.
And if the current vibration displacement is smaller than or equal to the vibration displacement threshold, determining the eccentricity of the washing machine according to the load inertia and the current vibration displacement, and increasing the rotating speed according to the eccentricity of the washing machine to reach the target rotating speed of the dewatering barrel.
In one embodiment of the present application, a method of increasing a rotational speed according to an eccentric amount includes:
judging the size interval of the eccentric amount; if in the small eccentric interval, setting the target rotating speed as the highest rotating speed; if the target rotating speed is set to be the second highest rotating speed in the medium eccentric interval, the speed value of the highest rotating speed is smaller than the second highest rotating speed; if the target rotating speed is set to be the third highest rotating speed in the large eccentric interval, the speed value of the second highest rotating speed is smaller than the third highest rotating speed. The second maximum rotation speed and the third maximum rotation speed are relative values for the maximum rotation speed, that is, there is no specific value, and they are also determined according to different models and specifications of washing machines. The eccentricity of the washing machine is obtained by the load inertia and the vibration displacement of the washing machine, and is determined by early testing of the washing machine, for example, for the load inertia of an A-B interval, the corresponding interval of the vibration displacement x is 0< x ≦ C, the corresponding eccentricity condition is a small eccentricity condition, the corresponding interval of the vibration displacement x is C < x ≦ D, the corresponding eccentricity condition is a medium eccentricity condition, the corresponding interval of the vibration displacement is D < x ≦ F, the corresponding eccentricity condition is a large eccentricity condition, therefore, the current eccentricity state can be determined according to the actual load inertia and the vibration displacement, then different rotating speeds are adjusted according to different eccentricity states, so that the rotating speed is not excessively increased to cause the situations of dehydration vibration or noise, and the rotating speed is increased, the dewatering efficiency is accelerated. Step S2 of the present application is adjusted for the low rotation speed stage of the dehydration program, and the vibration noise of the washing machine is effectively reduced by determining whether the current vibration displacement of the low-speed dehydration state exceeds the vibration displacement threshold to perform real-time rotation speed control and vibration preservation.
For the low-speed dehydration state of the washing machine, the rotation speed is low, so the vibration sensor can directly detect the current vibration displacement, but in the high-speed dehydration state of the washing machine, the vibration displacement detected by the vibration sensor is inaccurate, so that in the high-speed dehydration state of the washing machine, the real-time rotation speed control and vibration protection of the washing machine by the vibration displacement cannot be realized, and therefore, the applicant improves the specific adjusting method in the high-speed dehydration state of the washing machine as follows:
s3: and in the high-rotation-speed stage of the dehydration program, acquiring the vibration acceleration of the dehydration barrel, and adjusting the dehydration rotation speed according to the numerical relation between the vibration acceleration and the acceleration threshold value.
Wherein, the vibration acceleration is directly detected by the vibration sensor. The acceleration threshold is obtained according to the maximum eccentric amount allowed by the washing machine under different load inertias and different maximum rotating speeds, and is a value preset according to the washing machines of different models and specifications. In the dehydration degree of the washing machine, the data of the washing machine with the specification is directly used as the acceleration threshold value.
In one embodiment of the application, in the high-rotation-speed stage of the dehydration program, the method for adjusting the dehydration rotation speed according to the numerical relation between the vibration acceleration and the acceleration threshold value comprises the following steps: and obtaining the current vibration acceleration, if the current vibration acceleration is greater than the acceleration threshold, reducing the rotating speed of the dehydration barrel to realize that the current vibration acceleration is less than the acceleration threshold, and if the current vibration acceleration is less than or equal to the acceleration threshold, improving the rotating speed of the dehydration barrel to reach the target rotating speed of the dehydration barrel.
Step S3 is a method for controlling the rotation speed of the washing machine in a high-speed dehydration state, where the rotation speed in the high-speed dehydration state has a critical value, and when the determination criterion of the critical value is satisfied, the vibration and noise of the washing machine are small when the washing machine is dehydrated at the rotation speed of the critical value, and when the rotation speed is higher than the critical value, the vibration and noise of the washing machine are large. Therefore, the application carries out the adjustment of the rotating speed by checking the current vibration acceleration and limiting the acceleration under the high-speed dehydration state, when the current vibration acceleration is less than or equal to the acceleration threshold, the rotating speed is continuously increased to accelerate the dehydration efficiency, when the current vibration acceleration is greater than the acceleration threshold, the rotating speed of the washing machine is reduced to reach the target rotating speed of the washing machine, the phenomena of large vibration and large noise caused by overhigh rotating speed of the washing machine are avoided, the critical value is the target rotating speed, the target rotating speeds of different models of washing machines are different, which is determined according to the specification and use condition of the washing machine, and the present application does not directly compare the rotation speed with the target rotation speed as a way of reducing vibration and noise, but utilizes the comparison of the current vibration acceleration and the limit acceleration, because the two values are along with the actual performance of the washing machine, the current situation of the washing machine can be judged more accurately.
After the control is completed by the above control method, the dehydration tub continuously dehydrates at the target rotation speed until the dehydration time is finished. And (4) finishing the dehydration, namely performing the dehydration at the target rotating speed as the last step of the dehydration until the set dehydration time is finished.
In one embodiment of the present application, the method further comprises:
acquiring the current dewatering attempt time N, wherein the dewatering attempt time N is determined according to the time of restarting a dewatering process when the vibration displacement is larger than the displacement threshold, namely if the initial first dewatering input is N which is 0, N represents the time of restarting the dewatering process when the vibration displacement is larger than the displacement threshold, and if the initial first dewatering input is N which is 1, the current dewatering attempt time N is the time of restarting the dewatering process when the vibration displacement is larger than the displacement threshold plus the time after one initial dewatering process, namely the first dewatering is recorded once, and the later dewatering process is restarted once as long as the vibration displacement is larger than the displacement threshold; the general value interval of the current dehydration attempt time number N is (N is 1, 2 … … M-1), M is the maximum set dehydration time number, if the current dehydration attempt time number N is greater than or equal to the maximum set dehydration time number M, the non-dehydration alarm is carried out, the corresponding dehydration time number reaches the set upper limit, the washing machine cannot carry out dehydration, and at the moment, the alarm is directly given, and a maintenance person is prompted to carry out corresponding replacement and maintenance. And if the current dehydration attempt times are less than the maximum set times of dehydration, gradually increasing the rotation speed of the dehydration barrel. The corresponding steps of the method are generally used at the beginning of the whole program, i.e. before step S1, to perform dehydration alarm control.
In one embodiment of the present application, in the low rotation speed stage of the spin-drying process, after the spin-drying tub is controlled to shake apart and distribute the laundry, the current spin-drying attempt number is increased by 1, and the number determination step is re-entered. This step is also a step of accumulating the current number of dehydration attempts N.
The present application will be further described with reference to a specific application of a dehydration control method for a washing machine.
As shown in fig. 2, the present application discloses a dehydration control method for a washing machine, which specifically comprises the following steps:
step 1: recording the current dehydration attempt times as N; the general value interval of the current dehydration attempt times N is (N is 1, 2 … … M-1), and M is the maximum set dehydration times.
Step 2: calculating load inertia of the clothes;
step 3: if the current dehydration attempt time N is more than or equal to the maximum set time M of dehydration, the washing machine gives an alarm of incapability of dehydration; if the current dehydration attempt times N are less than the maximum dehydration set times M, gradually increasing the rotating speed of the washing machine;
step 4: when the real-time washing machine rotating speed is less than the designated detection speed S, obtaining the current vibration displacement, if the current vibration displacement is greater than the vibration displacement threshold value, reducing the washing machine rotating speed, generally reducing the washing machine rotating speed until the current vibration displacement is reduced to zero, namely stopping rotating, shaking, dispersing and distributing the clothes again, performing dehydration again, increasing the current dehydration attempt time N by 1 time, returning to the Step1, and restarting the washing machine dehydration program.
Step 5: and if the current vibration displacement is smaller than or equal to the vibration displacement threshold, determining the eccentricity of the washing machine according to the load inertia and the current vibration displacement, and increasing the rotating speed according to the eccentricity of the washing machine to reach the target rotating speed of the dewatering barrel.
Step 6: when the rotating speed of the real-time washing machine is greater than or equal to the designated detection speed S, the current vibration acceleration and the limited acceleration are obtained, if the current vibration acceleration is greater than the acceleration threshold, the rotating speed of the dewatering barrel is reduced to achieve the effect that the current vibration acceleration is smaller than the acceleration threshold, and if the current vibration acceleration is smaller than or equal to the acceleration threshold, the rotating speed of the dewatering barrel is increased to achieve the target rotating speed of the dewatering barrel.
Step 7: and continuously dehydrating the washing machine at the target rotating speed of the washing machine until the dehydration time is finished. And (4) finishing the dewatering, namely performing the dewatering at the target rotating speed as the last step of the dewatering until the set dewatering time is finished, wherein the whole stage of the dewatering time from the low speed to the high speed is generally set to be 5 minutes.
Another embodiment of the present invention provides a dehydration controlling apparatus of a washing machine, including:
the device comprises an acquisition module 10, a control module and a control module, wherein the acquisition module is used for acquiring the rotating speed, the current vibration displacement and the current vibration acceleration of a dewatering barrel of the washing machine in real time when the washing machine executes a dewatering program;
and the main control module 20 is connected with the acquisition module 10 and is used for receiving the data acquired by the acquisition module 10 and executing the dehydration control method of the washing machine so as to generate a dehydration control signal according to the data.
And the motor control module 30 is respectively connected with the main control module 20 and the motor of the dewatering barrel and used for receiving the dewatering control signal and driving the motor of the dewatering barrel to rotate according to the dewatering control signal so as to control the rotating speed of the dewatering barrel.
The dehydration control device and the dehydration control method of the present invention are used in combination. The specific use principle is as follows:
when the dehydration program is executed, the acquisition module 10 acquires the dehydration rotation speed of the dehydration barrel in real time and transmits the rotation speed to the main control module 20, and the main control module 20 determines that the current dehydration program is in a low rotation speed stage or a high rotation speed stage according to the dehydration rotation speed;
in the low-rotation-speed stage of the dehydration program, the acquisition module 10 acquires the vibration displacement of the dehydration barrel, and the main control module 20 adjusts the dehydration rotation speed according to the numerical relationship between the vibration displacement and a displacement threshold; the method comprises the following specific steps: the acquisition module 10 acquires the current vibration displacement and the load inertia of the clothes, the main control module 20 judges, and if the current vibration displacement is greater than the vibration displacement threshold, the motor control module 30 is controlled to reduce the rotation speed of the dehydration barrel and control the dehydration barrel to shake, scatter and distribute the clothes; if the current vibration displacement is smaller than or equal to the vibration displacement threshold, determining the eccentricity of the washing machine according to the load inertia and the current vibration displacement, and controlling the motor control module 30 to increase the rotating speed according to the eccentricity of the washing machine so as to achieve the target rotating speed of the dewatering tub;
in the high-rotation-speed stage of the dehydration program, the acquisition module 10 acquires the vibration acceleration of the dehydration barrel, and the main control module 20 adjusts the dehydration rotation speed according to the numerical relationship between the vibration acceleration and the acceleration threshold value. The specific steps are that the acquisition module 10 acquires the current vibration acceleration, if the current vibration acceleration is greater than the acceleration threshold, the main control module 20 controls the motor control module 30 to reduce the rotation speed of the dehydration barrel so as to realize that the current vibration acceleration is less than the acceleration threshold, and if the current vibration acceleration is less than or equal to the acceleration threshold, the main control module 20 controls the motor control module 30 to increase the rotation speed of the dehydration barrel so as to achieve the target rotation speed of the dehydration barrel.
Another embodiment of the present invention provides a washing machine, and a dehydration control method using the above washing machine.
The specific application of the washing machine of the invention is shown in fig. 4, the application takes a drum washing machine as an example, and discloses a washing machine which mainly comprises a window 1, a door seal 2, an outer cylinder 3, an inner cylinder 4, a box body 5, a vibration sensor 6, a hanging spring 7, a motor 8 and a vibration absorber 9, wherein the window 1 is arranged on the box body 5 and is connected with the outer cylinder 3 of the washing machine through the door seal 2, and the door seal 2 is usually made of rubber materials; the inner barrel 4 is positioned in the outer barrel of the washing machine and is connected with the motor 8 through a transmission mechanism; the outer cylinder 3 is connected with the box body 5 through a hanging spring 7 and a shock absorber 9; the vibration sensor 6 is placed on the outer tub of the washing machine. The washing machine main control module 20 drives the dewatering drum motor to rotate through the motor control module 30, meanwhile, the vibration information of the outer drum of the washing machine mainly comprises vibration displacement and vibration acceleration which are fed back to the washing machine main control module 20 through the vibration sensor 6, and the main control module 20 controls the rotating speed of the washing machine according to the dewatering control algorithm corresponding to the embodiment, so that the vibration noise of the washing machine is guaranteed.
The invention relates to a dewatering control method and a device of a washing machine and the washing machine, which realize the judgment of the load eccentricity of the washing machine by detecting the current vibration displacement of an outer cylinder of the washing machine in a low-speed area under the condition of distinguishing the load inertia, and realize the real-time detection of the vibration condition of the washing machine by detecting the vibration acceleration of the outer cylinder of the washing machine in a high-speed area, thereby carrying out the real-time rotating speed control and vibration protection and effectively reducing the vibration noise of the washing machine, the washing machine according to the embodiment of the invention can accurately obtain the load eccentricity and acceleration threshold value condition of the washing machine when a dewatering barrel is dewatered, thereby accurately acquiring the real-time vibration condition of the washing machine, carrying out the rotating speed control and vibration protection according to the real-time vibration condition, effectively reducing the vibration and noise when the washing machine rotates at low speed and at high speed, thereby improving the dewatering effect, and effectively solving the problems of large vibration and large noise when the washing machine dewaters, the development of the washing machine industry is promoted.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are illustrative and not to be construed as limiting the present invention and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, and therefore all changes and modifications that come within the meaning of the claims and the description of the invention are to be embraced within the scope of the invention.
Claims (10)
1. A dehydration control method of a washing machine is characterized by comprising the following steps:
when a dehydration program is executed, acquiring the dehydration rotating speed of a dehydration barrel in real time, and determining that the current dehydration program is in a low rotating speed stage or a high rotating speed stage according to the dehydration rotating speed;
in the low-rotation-speed stage of a dehydration program, acquiring the vibration displacement of the dehydration barrel and the load inertia of the clothes, and adjusting the dehydration rotation speed according to the numerical relationship between the vibration displacement and the displacement threshold value and the load inertia of the clothes;
and in the high-rotation-speed stage of the dehydration program, acquiring the vibration acceleration of the dehydration barrel, and adjusting the dehydration rotation speed according to the numerical relation between the vibration acceleration and the acceleration threshold value.
2. The dehydration control method of a washing machine according to claim 1, wherein the method for adjusting the dehydration rotation speed according to the numerical relationship between the vibration displacement and the displacement threshold and the load inertia of the laundry at the low rotation speed stage of the dehydration program comprises:
acquiring the current vibration displacement;
if the current vibration displacement is larger than the vibration displacement threshold, reducing the rotation speed of the dehydration barrel, and controlling the dehydration barrel to shake up and distribute the clothes;
and if the current vibration displacement is smaller than or equal to the vibration displacement threshold, determining the eccentricity of the washing machine according to the load inertia and the current vibration displacement, and increasing the rotating speed according to the eccentricity of the washing machine to reach the target rotating speed of the dewatering barrel.
3. The dehydration control method of a washing machine according to claim 1, wherein the method for adjusting the dehydration rotation speed according to the numerical relationship between the vibration acceleration and the acceleration threshold value in the high rotation speed stage of the dehydration program comprises:
acquiring current vibration acceleration;
if the current vibration acceleration is larger than the acceleration threshold, reducing the rotating speed of the dehydration barrel to realize that the current vibration acceleration is smaller than the acceleration threshold;
and if the current vibration acceleration is smaller than or equal to the acceleration threshold, increasing the rotating speed of the dehydration barrel to reach the target rotating speed of the dehydration barrel.
4. The dehydration control method of a washing machine according to claim 1, wherein said method further comprises:
acquiring the current number of times of the dehydration attempt, wherein the number of times of the dehydration attempt is determined according to the number of times of restarting the dehydration program when the vibration displacement is larger than the displacement threshold;
and if the current dehydration attempt times are more than or equal to the maximum set times of dehydration, performing dehydration incapability alarm, and if the current dehydration attempt times are less than the maximum set times of dehydration, gradually increasing the rotating speed of the dehydration barrel.
5. The dehydration control method of a washing machine according to claim 4, wherein: in the low rotation speed stage of the dehydration program, after controlling the dehydration barrel to shake apart and distribute the clothes, increasing the current dehydration attempt number by 1 time, wherein the method for reducing the rotation speed of the dehydration barrel comprises the following steps: the rotation speed of the dewatering barrel is reduced to zero.
6. The dehydration control method of a washing machine according to claim 1, wherein the method of determining whether it is currently in a low rotation stage of the dehydration process or in a high rotation stage of the dehydration process according to the rotation speed of the dehydration tub comprises:
if the rotating speed of the dewatering barrel is less than the designated detection speed, determining that the dewatering process is in a low rotating speed stage at present;
and if the rotating speed of the dewatering barrel is greater than or equal to the specified detection speed, determining that the spinning machine is in a high rotating speed stage of the dewatering program at present.
7. The dehydration control method of a washing machine according to claim 1, wherein the method of increasing the rotation speed according to the eccentricity amount comprises:
judging the size interval of the eccentric amount;
if in the small eccentric interval, setting the target rotating speed as the highest rotating speed;
if the target rotating speed is set to be the second highest rotating speed in the medium eccentric interval, the speed value of the highest rotating speed is smaller than the second highest rotating speed;
if the target rotating speed is set to be the third highest rotating speed in the large eccentric interval, the speed value of the second highest rotating speed is smaller than the third highest rotating speed.
8. A dehydration control method of a washing machine according to claim 1, wherein: the acceleration threshold is determined according to the maximum allowable eccentricity of the washing machine at different load inertias and different maximum rotating speeds.
9. A dehydration control apparatus of a washing machine, comprising:
the acquisition module is used for acquiring the rotating speed, the current vibration displacement and the current vibration acceleration of a dewatering barrel of the washing machine in real time when the washing machine executes a dewatering program;
a main control module connected with the collection module for receiving the data collected by the collection module and executing the dewatering control method of the washing machine according to any one of claims 1 to 8 to generate a dewatering control signal according to the data.
And the motor control module is respectively connected with the main control module and the motor of the dewatering barrel and used for receiving the dewatering control signal and controlling the rotating speed of the dewatering barrel according to the dewatering control signal to drive the motor of the dewatering barrel to rotate.
10. A washing machine using the dehydration control method of the washing machine according to any one of claims 1 to 8.
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