CN105200709A - Method for controlling dewatering process of washing machine and washing machine - Google Patents
Method for controlling dewatering process of washing machine and washing machine Download PDFInfo
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- CN105200709A CN105200709A CN201410239944.4A CN201410239944A CN105200709A CN 105200709 A CN105200709 A CN 105200709A CN 201410239944 A CN201410239944 A CN 201410239944A CN 105200709 A CN105200709 A CN 105200709A
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Abstract
The invention provides a method for controlling the dewatering process of a washing machine. The method comprises the following steps that 1, a motor is started to start dewatering, and the step 2 is executed; 2, the rotating speed of the motor is detected at regular intervals, the change rate of the rotating speed is calculated, the obtained change rate value is compared with a normal range value, and the step 3 or the step 4 is executed according to whether the change rate is within the normal range or not; 3, when the change rate is not within the normal range, the motor operates in a speed reducing mode, detection is stopped, after the rotating speed is reduced to certain speed, acceleration is carried out again, and the step 2 is executed till the dewatering time is up; 4, when the change rate is within the normal range, the motor normally operates, and the step 2 continues to be executed till the dewatering time is up. The invention further provides the washing machine. The washing machine comprises a motor rotating speed detecting device connected with an information processing device of the washing machine. Whether impurities exist between the inner bucket and the outer bucket or not is judged through the change rate of the rotating speed of the motor in the dewatering process, and if the impurities exist, the motor operates in the speed reducing mode, the impurities falls into the bucket bottom, and the impurities can be automatically detected and discharged in the dewatering process.
Description
Technical field
The present invention relates to a kind of dehydration controlling method and washing machine, especially a kind of washing machine dehydration procedure control method and washing machine, belong to washing machine field.
Background technology
The foreign matter such as coin or button has dropped between the interior outer barrel of washing machine because of carelessness, when washing machine carries out dehydrating operations, foreign matter disorderly can fly between interior outer barrel, existing washing machine, no matter rotary drum washing machine or roller washing machine, major part prevents the foreign matter design remained in internal structure of washing machine from being all from interior bucket, the configuration aspects of impeller or draining valve solves, prevent foreign matter from falling into as much as possible and after dehydration terminates, foreign matter is flushed in foreign matter collection device by current when to there is foreign matter between interior outer barrel or between interior outer barrel, but find that there is in dehydration foreign matter fly in circles between interior outer barrel internal outer barrel impact time, can only accept passively and can not exist and in dehydration, remove foreign matter by active detecting foreign matter, the damage of device for washing machine may be caused thus, or stop laundry machine dehydration action by user's active braking and manually intake to remove foreign matter, but this action need user manual intervention is dewatered and is needed user at washing machine annex and Timeliness coverage, but in other instances, user is not necessarily by washing machine, and therefore foreign matter existence can produce noise or cause wearing and tearing to outer barrel in washing machine for a long time.
In view of this special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of washing machine dehydration procedure control method and washing machine are provided, can active detecting is brought to foreign matter to washing machine in dehydration load change handling failure in time, avoid causing larger damage to machine and without the need to user intervention.
For solving the problems of the technologies described above, the present invention adopts the basic conception of technical scheme to be:
A kind of washing machine dehydration procedure control method, comprises the following steps:
Step 1, starter motor start dehydration procedure, and perform step 2;
Start when step 2, self-starting motor, and detect at interval of the rotating speed of certain hour to motor for washer and calculate motor speed rate of change, and by the motor speed rate of change value that obtains compared with the normal range value of motor speed rate of change, whether in normal range (NR), perform step 3 or 4 respectively depending on the motor speed rate of change value obtained;
If when the motor speed rate of change value that step 3 obtains is not in normal range (NR), then decelerating through motor runs and stops detecting, again accelerate to proceed dehydration after motor speed is down to a certain speed, and perform step 2 until the dewatering time of setting stops dehydration at the expiration;
If when the motor speed rate of change value that step 4 obtains is in normal range (NR), then motor normally runs, and continue to perform step 2 until the dewatering time of setting stops dehydration at the expiration;
The normal range value of described motor speed rate of change refers to the value range of the relative speed variation of motor under washing machine normal operation.
Further, the normal range value of the motor speed rate of change startup stage that the normal range value of described motor speed rate of change at least comprising laundry machine dehydration and in the dehydration stabilization sub stage.
Further, the normal range value of described motor speed rate of change also comprises the normal range value of the motor speed rate of change of laundry machine dehydration stop phase.
Further, the startup stage of laundry machine dehydration the time point that, the rotating speed normal value of motor in dehydration stabilization sub stage and dehydration stop phase three phases, normal value are corresponding and normal variation rate are determined known through experiment.
Further, while deceleration, in washing machine, water inlet is stopped again after water inlet.
Further, water inlet is stopped enter the water of certain hour in washing machine while decelerating through motor after.
Further, water inlet is stopped enter a certain amount of water in washing machine while decelerating through motor after.
Further, the interval time of double detection is 0-100ms.
A kind of washing machine, comprise device for detecting motor rotary speed, device for detecting motor rotary speed is connected with the information processor of washing machine, and the information processor of described washing machine performs above-mentioned washing machine dehydration procedure control method described in any one and controls washing machine and dewater.
After adopting technique scheme, the present invention compared with prior art has following beneficial effect.
A kind of washing machine dehydration procedure control method of the present invention, fly in circles between interior outer barrel because the foreign matter be present in dehydration in washing machine between outer barrel rotates with interior bucket and make bucket, the rotating speed of motor is had an impact simultaneously, by calculating motor speed rate of change and to compare with the relative speed variation value range of motor under washing machine normal operation judge whether there is foreign matter between outer barrel in washing machine to the Rotating speed measring of motor in dehydration, if when the motor speed changing value obtained is not in normal range (NR), then think to there is foreign matter, decelerating through motor is run, at the bottom of foreign matter is sunk down into barrel, the infringement that may cause washing machine when having foreign matter and user not discover when also prevent laundry machine dehydration without the need to user's manual intervention dehydration between interior outer barrel.
A kind of washing machine of the present invention, detected by the rotating speed of device for detecting motor rotary speed to motor and calculate motor speed rate of change, and compare with the normal range value of motor speed rate of change and judge that whether there is foreign matter in washing machine between outer barrel makes bucket, and by aforementioned washing machine dehydration procedure control method, foreign matter is processed to the infringement of avoiding foreign matter to cause.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the flow chart of washing machine dehydration procedure control method in embodiment one.
Fig. 2 is under normal circumstances and speed versus time graph figure under there is foreign matter situation.
Detailed description of the invention
Embodiment one
In the present embodiment, the rotating speed of motor is detected, and calculate the relative speed variation of motor, by the relative speed variation of motor that obtains compared with its normal range value, namely compare with the value range of the relative speed variation of motor under washing machine normal operation, whether the value depending on the relative speed variation of motor obtained judges whether have foreign matter between interior outer barrel in normal range (NR).
As shown in Figure 1, a kind of washing machine dehydration procedure control method, comprises the following steps:
A kind of washing machine dehydration procedure control method, comprises the following steps:
Step 1, starter motor start dehydration procedure, and perform step 2;
When step 2, self-starting motor, and at interval of certain hour motor for washer rotating speed detected and calculate motor speed rate of change in this time interval; By the motor speed rate of change value that obtains compared with the normal range value of motor speed rate of change, whether in normal range (NR), perform step 3 or 4 respectively depending on it;
If when the value of step 3 motor speed rate of change is not in normal range (NR), then decelerating through motor runs and stops detecting, and again accelerates to proceed dehydration, and perform step 2 until the dewatering time of setting stops dehydration at the expiration after motor speed is down to a certain speed;
If when step 4 motor speed rate of change value is in normal range (NR), then motor normally runs, and continue to perform step 2 until the dewatering time of setting stops dehydration at the expiration.
Laundry machine dehydration is divided into three phases; the startup stage of dehydration, dewater stabilization sub stage and dehydration stop phase; this three phases motor is in respectively startup stage, stable operation stage, reduction of speed shut down the stage, and the time point that the rotating speed normal value of motor in three phases, normal value are corresponding and motor speed rate of change normal range value are determined known through experiment.
In the present embodiment, the rotating speed of machine startup stage that the rotating speed of motor and the normal range value of relative speed variation at least comprising laundry machine dehydration and in the dehydration stabilization sub stage and the normal range value of relative speed variation, also comprise the rotating speed of the motor of laundry machine dehydration stop phase and the normal range value of relative speed variation.
Can only comprise the first two stage in other embodiments, only detect the rotating speed of the motor in the first two stage and calculate motor speed rate of change, then the motor speed rate of change this obtained compare with its normal range value.
The interval time of double detection is 0-100ms, and in the present embodiment, this time interval gets 80ms.
In step 3, motor speed to reduce to after certain setting value High Rotation Speed again.Decelerating through motor, then the interior bucket of washing machine also runs slowly, thus the foreign matter between interior outer barrel is sunk.
In order to more effectively remove foreign matter, intaking in washing machine while decelerating through motor, by the effect of water the foreign matter at the bottom of dropping on barrel being rushed in draining valve and getting rid of, avoid foreign matter to cause danger with interior bucket high-speed rotary constantly.Owing to being intake in dehydration procedure, therefore need stop water inlet after water inlet certain hour M second, each flooding time span is 1-20 second.Or enter a certain amount of water while decelerating through motor in washing machine, each water inlet measures 0.5-30 liter.In the present embodiment, intake with flooding time control, one time flooding time gets 10 seconds.
In order to carry out more effective protection to washing machine, decelerating through motor can by realizing motor power-off, and after decelerating through motor to certain setting value, energising realizes motor High Rotation Speed again.After motor power-off, machine shaft is in free rotary state based on inertia, but unregulated power is supplied to motor, therefore can avoid the infringement to motor.After detecting that motor speed is low to moderate a setting value, then to electrical power, make motor output kinetic energy again.
As shown in Figure 2; four width figure are respectively under normal circumstances or there is the speed versus time graph figure in foreign matter situation; X-axis represents the time; Y-axis represents rotating speed, respectively corresponding motor speed versus time relation under normal operating conditions or startup stage, stable operation stage, in the reduction of speed shutdown stage, there is speed versus time relation when foreign matter is beaten barrel.
Can find out, under normal circumstances, speed versus time graph is level and smooth curve, and when there is foreign matter, appearance is fluctuated by speed versus time graph, the different stages exist foreign matter to beat barrel time, speed versus time graph is different, but all can reflect, there is foreign matter between interior outer barrel when to beat barrel, there is impact to motor speed, motor speed is fluctuated, produce sudden change, thus can detect accordingly and judge in washing machine, between outer barrel, whether have foreign matter to exist.
As can be seen from the figure, speed versus time graph is roughly divided into three phases, and the ascent stage in early stage, the decline stage in the stabilization sub stage in mid-term and later stage, corresponding electric motor starting stage, stable operation stage, reduction of speed shut down the stage respectively.Larger at the rate of change of ascent stage and decline stage motor speed.
Find in an experiment, at ascent stage, motor speed is less, interior bucket rotating speed is less, interior bucket rotates the deficiency of air produced and flys in circles to be involved in by foreign matter between interior outer barrel, and at the ascent stage close to the middle stable stage, along with the lifting of motor speed, interior bucket rotary speed accelerates thereupon, foreign matter can rotate with interior bucket the air-flow produced and fly in circles between interior outer barrel, in speed versus time graph figure and Fig. 2 under normal operation in the first width figure, at ascent stage, the rate of change of motor speed is substantially identical.
Detected by interval and calculate the relative speed variation of motor, by the relative speed variation of the motor calculated compared with the normal range value of the relative speed variation through testing the motor determined under known washing machine normal operation, if the value of motor speed rate of change is not in normal range (NR), then actuating motor speed-down action and water inlet action.If in normal range (NR), then normally run and continue interval and detect, until the dewatering time of setting at the expiration, dehydration procedure terminates.
In the decline stage, the reduction of speed of corresponding motor shuts down the stage, and motor speed diminishes, and interior bucket rotating speed also reduces, and in the decline stage close to the middle stable stage, interior bucket rotary speed is very fast, and foreign matter can rotate with interior bucket the air-flow produced and fly in circles between interior outer barrel.In speed versus time graph figure as can be seen from Fig. 2 under normal operation, in the decline stage, motor speed rate of change is substantially identical.Detected by interval and calculate the relative speed variation of motor, by the motor speed rate of change calculated compared with the normal range value of the relative speed variation through testing the motor determined under known washing machine normal operation, if the value of motor speed rate of change is not in normal range (NR), then actuating motor speed-down action.Owing to being now that the reduction of speed of motor shuts down the stage, therefore no longer intaking, in other embodiments, also can not only slow down but also intake.
Due to washing machine under normal operating conditions, in three phases, the relative speed variation of the motor in each stage is basically identical, all there is no large sudden change, therefore, the relative speed variation of the motor in each stage all the reference change rate in stages respectively can add the normal range (NR) of an identical mobility scale as the motor speed rate of change in this stage.This reference change rate is determined known through experiment.
The value of this mobility scale is 1%-10%, namely be 1%-10% in the variable scope that reference change rate is upper and lower, in the present embodiment, this mobility scale value gets 5%, namely be 5% in the upper and lower variable scope of reference change rate, as the normal range (NR) of motor speed rate of change.
A kind of washing machine dehydration procedure control method of the present invention, by detecting motor speed in dehydration and calculating motor speed rate of change, judge whether there is foreign matter between interior outer barrel by being compared with its normal range value by the motor speed calculated rate of change, if motor speed rate of change is not in normal range (NR), then think to there is foreign matter, decelerating through motor is made to run and intake in washing machine, pour in draining valve under the effect of water and get rid of at the bottom of foreign matter being slowed down to sink down into barrel, without the need to user's manual intervention, have foreign matter between interior outer barrel when also prevent laundry machine dehydration and user does not discover time the infringement that may cause washing machine.
Embodiment two
A kind of washing machine, comprise device for detecting motor rotary speed, device for detecting motor rotary speed is connected with the information processor of washing machine.The information processor washing machine dehydration procedure control method performed in embodiment one of described washing machine controls washing machine and dewaters.
By device for detecting motor rotary speed, motor speed is detected, information processor testing result being reached washing machine calculates its rate of change, the calculating motor speed rate of change of gained and the normal range value of motor speed rate of change compare by information processor, judge it whether in normal range (NR), according to result, information processor judges that whether there is foreign matter in washing machine in outer barrel makes bucket, if motor speed rate of change is not in normal range (NR), then think to there is foreign matter in outer barrel in washing machine, information processor sends signal to motor, make decelerating through motor, and send signal make water feed apparatus open intake in washing machine, and stop water inlet after a certain time, motor reduction and water inlet two means are utilized foreign matter to be sunk and foreign matter punching is discharged by draining valve to draining valve by water inlet, avoid the infringement that foreign matter may cause washing machine.
Embodiment in above-described embodiment can combine further or replace; and embodiment is only be described the preferred embodiments of the present invention; not the spirit and scope of the present invention are limited; under the prerequisite not departing from design philosophy of the present invention; the various changes and modifications that in this area, professional and technical personnel makes technical scheme of the present invention, all belong to protection scope of the present invention.
Claims (9)
1. a washing machine dehydration procedure control method, is characterized in that: comprise the following steps:
Step 1, starter motor start dehydration procedure, and perform step 2;
Start when step 2, self-starting motor, and detect at interval of the rotating speed of certain hour to motor for washer and calculate motor speed rate of change, and by the motor speed rate of change value that obtains compared with the normal range value of motor speed rate of change, whether in normal range (NR), perform step 3 or 4 respectively depending on the motor speed rate of change value obtained;
If when the motor speed rate of change value that step 3 obtains is not in normal range (NR), then decelerating through motor runs and stops detecting, again accelerate to proceed dehydration after motor speed is down to a certain speed, and perform step 2 until the dewatering time of setting stops dehydration at the expiration;
If when the motor speed rate of change value that step 4 obtains is in normal range (NR), then motor normally runs, and continue to perform step 2 until the dewatering time of setting stops dehydration at the expiration;
The normal range value of described motor speed rate of change refers to the value range of the relative speed variation of motor under washing machine normal operation.
2. a kind of washing machine dehydration procedure control method according to claim 1, is characterized in that: the normal range value of the motor speed rate of change startup stage that the normal range value of described motor speed rate of change at least comprising laundry machine dehydration and in the dehydration stabilization sub stage.
3. a kind of washing machine dehydration procedure control method according to claim 2, is characterized in that: the normal range value of described motor speed rate of change also comprises the normal range value of the motor speed rate of change of laundry machine dehydration stop phase.
4. a kind of washing machine dehydration procedure control method according to any one of claim 1-3, is characterized in that: the time point that the rotating speed normal value of motor startup stage of laundry machine dehydration, in dehydration stabilization sub stage and dehydration stop phase three phases, normal value are corresponding and normal variation rate are determined known through experiment.
5. a kind of washing machine dehydration procedure control method according to any one of claim 1-3, is characterized in that: while deceleration, stop water inlet again in washing machine after water inlet.
6. a kind of washing machine dehydration procedure control method according to any one of claim 1-3, is characterized in that: stop water inlet entering the water of certain hour in washing machine while decelerating through motor after.
7. a kind of washing machine dehydration procedure control method according to any one of claim 1-3, is characterized in that: stop water inlet entering a certain amount of water in washing machine while decelerating through motor after.
8. a kind of washing machine dehydration procedure control method according to any one of claim 1-3, is characterized in that: the interval time of double detection is 0-100ms.
9. a washing machine, it is characterized in that: comprise device for detecting motor rotary speed, device for detecting motor rotary speed is connected with the information processor of washing machine, and the information processor enforcement of rights of described washing machine requires that the washing machine dehydration procedure control method of 1-8 described in any one controls washing machine and dewater.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110387669A (en) * | 2018-04-17 | 2019-10-29 | 青岛海尔滚筒洗衣机有限公司 | Control method for washing machine and washing machine |
| CN110699913A (en) * | 2019-10-14 | 2020-01-17 | 青岛海尔洗衣机有限公司 | Control method of pulsator washing machine and pulsator washing machine |
| CN111501280A (en) * | 2020-04-22 | 2020-08-07 | 青岛海尔洗衣机有限公司 | Control method of clothes treatment equipment and clothes treatment equipment |
| WO2021121100A1 (en) * | 2019-12-18 | 2021-06-24 | 青岛海尔洗衣机有限公司 | Drying machine |
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| CN110699913A (en) * | 2019-10-14 | 2020-01-17 | 青岛海尔洗衣机有限公司 | Control method of pulsator washing machine and pulsator washing machine |
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