CN105506918A - Washing machine and control method thereof - Google Patents
Washing machine and control method thereof Download PDFInfo
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- CN105506918A CN105506918A CN201510866311.0A CN201510866311A CN105506918A CN 105506918 A CN105506918 A CN 105506918A CN 201510866311 A CN201510866311 A CN 201510866311A CN 105506918 A CN105506918 A CN 105506918A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
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Abstract
The invention provides a washing machine and a control method thereof, and belongs to the household appliance field; the method comprises the following steps: executing at least once weighing step; the weighing step comprises the following steps: inputting a pulse width modulating PWM control signal to a motor when the motor is in an idle state, and gradually adding the PWM control signal duty ratio according to a preset step pitch; obtaining the present duty ratio when the motor starts to run, and setting the PWM control signal duty ratio as zero so as to stop the motor; determining the load weight corresponding to the present duty ratio according to a preset corresponding relation between the duty ratio and the load weight. The washing machine control method can improve control safety of the washing machine.
Description
Technical field
The present invention relates to field of household appliances, particularly relate to a kind of washing machine and control method thereof.
Background technology
Washing machine needed to weigh to the clothing in washing machine drum before beginning water filling is washed.Current washing machine product, drives washing machine drum to rotate by motor, calculates clothes weight according to the speed that washing machine drum rotating speed changes.Carry out in the process of weighing at washing machine, usually needing to drive washing machine drum to rotate a fixing turn could determine clothes weight.Once occurred in news report that child got into case injured in washing machine drum, existing washing machine product, if there is child to creep into washing machine drum, is carrying out in the process of weighing,, thus there is the problem that Product Safety is not high in the rotation meeting of washing machine drum and damaging child.
Summary of the invention
The application provides a kind of washing machine and control method thereof, can improve the security of washing machine.
For achieving the above object, the application adopts following technical scheme:
First aspect, a kind of control method of washing machine is provided, washing machine comprises cylinder and motor, motor rotates for driving described cylinder, performs the step of weighing at least one times, the step kind of weighing each time, increase pwm control signal gradually, to increase the driving force of motor gradually, dutycycle corresponding when just having started to rotate according to motor, determines load weight.
Concrete, the step of once weighing comprises:
When motor remains static, to described motor input pulse width modulation (PWM) control signal, wherein, the initial duty cycle of described pwm control signal is between the first critical dutycycle and the second critical dutycycle, described first critical dutycycle for described motor under described cylinder no-load condition start rotate needed for minimum duty cycle, described second critical dutycycle is for described cylinder load is for driving the minimum duty cycle needed for described electric machine rotation to predetermined angle when preset weight, described preset weight is no more than 2.5 kilograms, and described predetermined angle is no more than 90 °;
The dutycycle of described pwm control signal is increased gradually according to default step pitch, wherein, described default step pitch is no more than the difference of described second critical dutycycle and the 3rd critical dutycycle, described 3rd critical dutycycle for described cylinder load for drive when described preset weight described motor start rotate needed for minimum duty cycle;
When described motor starts to rotate, obtain current duty cycle, and the input duty cycle of motor is set to zero, make motor stalling, according to the default corresponding relation of dutycycle and load weight, determine the load weight corresponding to current duty cycle.
Second aspect, provides a kind of washing machine, and washing machine comprises cylinder and motor, and motor is used for head roll and rotates, and washing machine also comprises control device, and described control device comprises:
Signaling control unit, for when motor remains static, to described motor input pulse width modulation (PWM) control signal, wherein, the initial duty cycle of described pwm control signal is between the first critical dutycycle and the second critical dutycycle, described first critical dutycycle for described motor under described cylinder no-load condition start rotate needed for minimum duty cycle, described second critical dutycycle is for described cylinder load is for driving the minimum duty cycle needed for described electric machine rotation to predetermined angle when preset weight, described preset weight is no more than 2.5 kilograms, described predetermined angle is no more than 90 °,
Described signaling control unit, also for increasing the dutycycle of described pwm control signal gradually according to default step pitch, wherein, described default step pitch is no more than the difference of described second critical dutycycle and the 3rd critical dutycycle, described 3rd critical dutycycle for described cylinder load for drive when described preset weight described motor start rotate needed for minimum duty cycle;
Described signaling control unit, also for when described motor starts to rotate, obtains current duty cycle, and the input duty cycle of motor is set to zero, make motor stalling;
Determining unit, for the default corresponding relation according to dutycycle and load weight, determines the load weight corresponding to the current duty cycle that described signaling control unit obtains.
Washing machine provided by the invention and control method thereof, when motor remains static, pwm control signal is increased gradually according to default step pitch to described motor input duty cycle, increase motor torque gradually, when torque is less, motor can not rotate by head roll, when torque reaches or exceed the critical value of head roll rotation, motor head roll starts to rotate, now obtain current duty cycle and the dutycycle of described pwm control signal is set to zero, make motor stalling, further according to the default corresponding relation of dutycycle and load weight, determine the load weight corresponding to current duty cycle.After the dutycycle of pwm control signal is set to zero, after cylinder gravitate slightly swings, get back to inactive state.The maximum amplitude of oscillation, by the impact presetting step pitch, can be limited within safe range by adjusting default step pitch, if there is child to creep into cylinder, can not damage because of the swing of weighing process intermediate roll by the maximum amplitude of oscillation of cylinder.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The control method schematic flow sheet of a kind of washing machine that Fig. 1 provides for embodiments of the invention;
Fig. 2 is the dutycycle relation schematic diagram over time of pwm control signal;
The structural representation of a kind of washing machine that Fig. 3 provides for embodiments of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The application provides a kind of control method of washing machine, is applied to tumbling-box washing machine.Tumbling-box washing machine comprises cylinder and motor, and motor is used for head roll and rotates.The driving force size that motor head roll rotates is weighed by the torque of motor, and the torque of motor is larger, and the driving force that head roll rotates is stronger, and the rotating speed of motor and cylinder is higher.
Embodiments of the invention provide a kind of control method of washing machine, with reference to shown in Fig. 1, specifically comprise the following steps:
101, when motor remains static, to motor input pwm control signal.
By pulse width modulation, (full name: PulseWidthModulation is called for short: PWM) mode controls motor washing machine.The load of washing machine refers to the weight in cylinder, and load weight is larger, and the torque required for head roll rotates is larger.When motor remains static, to motor input pwm control signal.The dutycycle of pwm control signal is larger, and motor torque is larger.The initial duty cycle of pwm control signal is between the first critical dutycycle and the second critical dutycycle.
Wherein, the first critical dutycycle for motor under cylinder no-load condition start rotate needed for minimum duty cycle, that is, the torque corresponding to initial duty cycle can drive empty bucket to rotate just.
Second critical dutycycle for cylinder load for drive motors when preset weight turns to minimum duty cycle needed for predetermined angle.Wherein, preset weight is no more than 2.5 kilograms, and predetermined angle is no more than 90 °.
First critical dutycycle and the second critical dutycycle all can be determined by actual measurement, and the concrete value of initial duty cycle is the value according to surveying the first critical dutycycle of obtaining and the second critical dutycycle and presetting.
102, the dutycycle of pwm control signal is increased gradually according to default step pitch.
Dutycycle to the pwm control signal of motor input increases gradually, and the torque phase of motor should increase, and the driving force that namely motor head roll rotates increases gradually.
The time dependent relation schematic diagram of dutycycle of the pwm control signal shown in composition graphs 2, time point t1, t2 etc. on transverse axis identify, and dutycycle P1, P2 etc. identify.Often through certain hour interval, the dutycycle of pwm control signal just increases once.Two adjacent time intervals can be isometric, also can Length discrepancy.Such as, the time interval between t1 and t2, can be equal with the time interval between t2 and t3, or not etc.The dutycycle of pwm control signal, the variable quantity increased once is default step pitch, and default step pitch along with time variations, also can be able to remain unchanged.Such as, t2 time point dutycycle increases, and corresponding default step pitch is (P2-P1), and the default step pitch that t2 time point is corresponding is (P3-P2), and (P3-P2) can be equal with (P2-P1), also can not wait.
Along with the dutycycle of pwm control signal increases gradually, motor torque increases gradually.In cylinder in loaded situation, the torque corresponding to initial duty cycle is not enough to head roll and rotates, and empty bucket could be driven to rotate after increasing gradually.
When the dutycycle of pwm control signal is increased one time according to default step pitch, the increment corresponding to the torque of motor is called the torque incremental change of motor.When default step pitch value is less, corresponding torque incremental change is less, and when motor torque exceedes the critical value of head roll rotation, because torque incremental change is less, the amplitude that cylinder swings is also less.Similarly, when the value of default step pitch is larger, the amplitude that respective rollers swings is larger.Therefore the amplitude that cylinder swings is subject to the impact of default step pitch size.
Default step pitch is the value preset according to measured data, in order to the amplitude swung by cylinder limits within the specific limits, needs to limit the maximum presetting step pitch.Concrete, default step pitch is no more than the difference of the second critical dutycycle and the 3rd critical dutycycle.Wherein, the 3rd critical dutycycle for cylinder load for drive motors when preset weight start to rotate needed for minimum duty cycle, the concrete value of the 3rd critical dutycycle is by surveying the value determined.
103, when motor starts to rotate, obtain current duty cycle, and the dutycycle of pwm control signal is set to zero, make motor stalling.
When the dutycycle of pwm control signal is less, motor can not rotate by head roll, and when dutycycle increases gradually, motor torque increases gradually, and when motor torque exceedes the critical value of head roll rotation, cylinder starts to rotate.
In a kind of concrete application scenarios, washing machine comprises induction installation and control device.When induction installation senses that cylinder rotates by inactive state, the control device to washing machine sends turn feedback signal.Wherein, induction installation can be specifically Hall element, and feedback signal is pulse signal.Monitored by the motion state of Hall element to machine shaft, when electric machine rotation, Hall element production burst signal, and pulse signal is sent to control device.When control device does not receive pulse signal, represent that motor remains static.Control device starts to receive pulse signal, represents that motor starts to rotate.Control device after receiving turn feedback signal, washing machine record current duty cycle, and the dutycycle of pwm control signal is set to zero.
Certainly, can also judge that motor starts to rotate by inactive state by other such as machinery, electronic circuit or mode that both combine, above mode of being undertaken judging by induction installation and control device is only a kind of possible implementation.
Be set to after zero by the dutycycle of pwm control signal, motor torque becomes 0, gravitate, and cylinder gets back to inactive state after slightly swinging.Integrating step 102, by the restriction of the maximum of default step pitch, the torque incremental change of motor has maximum, and the amplitude that therefore cylinder swings also has maximum.Cylinder is swung amplitude peak and be called the maximum amplitude of oscillation, if there is child to get in cylinder, need to ensure under the maximum amplitude of oscillation, the swing of cylinder can not damage child.Preset the maximum of step pitch and preset weight and predetermined angle positive correlation, the maximum positive correlation of the maximum amplitude of oscillation and default step pitch, therefore the maximum amplitude of oscillation and preset weight and predetermined angle positive correlation, the object reducing the maximum amplitude of oscillation can be reached, to improve the security of washing machine by reducing preset weight and predetermined angle or one of them.Usually, be no more than 2.5 kilograms with preset weight, predetermined angle is no more than 45 ° and is advisable.
104, according to the default corresponding relation of dutycycle and load weight, the load weight corresponding to current duty cycle is determined.
Associative list 1, the default table of comparisons comprises multiple load weight, the corresponding dutycycle interval of each load weight.The quantity of load weight is N, N=Lmax/A, and wherein Lmax represents the maximum load weight that washing machine allows, and A is weighing precision, and it is 5 kilograms that table 1 is depicted as Lmax, and weighing precision is the situation of 0.5 kilogram.
Table 1
| Dutycycle interval (%) | Load weight (kilogram) |
| (f，g] | 5 |
| …… | …… |
| (c，d] | 1 |
| (b，c] | 0.5 |
| [0，b] | 0 |
When load weight is 0, corresponding dutycycle interval is [0, b], and wherein a is the first critical dutycycle.When dutycycle is for being less than b, motor can not drive empty bucket to rotate, and when dutycycle is b, motor can drive empty bucket to rotate just.The initial duty cycle of pwm control signal is set to the value being greater than b usually.
C is the minimum duty cycle that drive motors rotates when load weight is 0.5 kilogram, (b, c] interval corresponding load weight is 0.5 kilogram.Similarly, d is the minimum duty cycle that drive motors rotates when load weight is 1 kilogram, (c, d] interval corresponding load weight is 1 kilogram.The like.
A dutycycle length of an interval degree, the difference namely between interval maxima and minima can be the size of a default step pitch.Such as, for dutycycle interval (b, c], when dutycycle is b, if presetting the value of step pitch is c-b, now dutycycle interval (b, c] length is the size of a default step pitch.
Or a dutycycle length of an interval degree is more than one adjacent default step pitch sum.Associative list 2, with dutycycle interval (c, d] for example, when dutycycle is c, the value presetting step pitch is α, and when dutycycle increases to b+ α, the value presetting step pitch is β, further, when dutycycle increases to b+ alpha+beta, the value presetting step pitch is γ, and b+ alpha+beta+γ=d.
Table 2
| Dutycycle interval (%) | Corresponding default step pitch |
| (c，d] | c→b+α→b+α+β→b+α+β+γ |
105, weighing results is exported.
Step 101-104 is the step of once weighing.
Optionally, after washing machine performs the step of once weighing, the gravimetric value of output loading.Wherein the gravimetric value of load is for once to perform determined load weight.
Or, optionally, after washing machine performs at least twice step of weighing, the gravimetric value of output loading.The wherein gravimetric value of the load determined load weight average of determined at least two load weights of step of weighing according at least twice execution.
Such as, perform the step of weighing for K time altogether, obtain K load weight value, using the mean value of K load weight value as load weight average, wherein K be greater than 1 integer.Or, using K load weight value maximum wherein and minimum of a value as rejecting abnormal data, the data stayed are averaged as load weight average.Or further, if the variance of K load weight value exceedes the default variance upper limit, then reject wherein maximum with the difference of mean value load weight value, until the variance of the load weight value stayed is no more than the default variance upper limit, then averages and obtain load weight average.Certainly can also by other data processing method rejecting abnormalities data, determine that load weight average is to improve weighing results accuracy, the application does not limit for the concrete mode of data processing.
Preferably, when the step that multiple exercise is weighed, the driving direction of motor alternately changes along clockwise direction with counterclockwise at least twice implementation.By changing driving direction to reduce the accumulated error caused when fixed-direction is weighed, improve data accuracy.Such as, when first time weighs, motor head roll rotates clockwise, and when second time is weighed, motor head roll rotates counterclockwise, the like.
Further preferred, when the step that multiple exercise is weighed, can the initial duty cycle of pwm control signal regulate, to reduce the time performing the step of weighing and consume.For continuous print twice implementation, the N-1 time perform weigh step time, when being started to rotate by motor, the value of the dutycycle of pwm control signal is as the 4th critical dutycycle, N be greater than 1 integer.When performing the step of weighing the N time, the initial duty cycle of pwm control signal only need be less than the 4th critical dutycycle, without the need to increasing obtaining minimum value from initial duty cycle, can reduce the time that step that execution weighs consumes like this.
Such as, associative list two, when performing the step of weighing the N-1 time, when motor starts to rotate, the dutycycle of pwm control signal is c, and namely the 4th critical dutycycle value is d.So when performing the step of weighing the N time, the initial duty cycle of pwm control signal can be the value of one or two (also can two or more) default step pitches less of d, and namely initial duty cycle can be c+ alpha+beta or c+ α.
The display unit of the gravimetric value of load by washing machine can export by washing machine, or in the application scenarios controlled washing machine by Terminal Server Client user, the gravimetric value of load is sent to client by load Indication message.
Further, when the gravimetric value of cylinder internal burden exceedes default upper loading limit, washing machine exports information warning, comprises text importing, buzzing alarm, sends information warning etc. to client.
106, receive washing instruction, start washing process.
After the weight of washing machine output loading or information warning, if user determines to start washing process, then send washing instruction by washer operation panel or client to washing machine, washing machine starts washing process.
The control method of the washing machine that embodiments of the invention provide, when motor remains static, pwm control signal is increased gradually according to default step pitch to motor input duty cycle, increase motor torque gradually, when torque is less, motor can not rotate by head roll, when torque reaches or exceed the critical value of head roll rotation, motor head roll starts to rotate, now obtain current duty cycle and the dutycycle of pwm control signal is set to zero, further according to the default corresponding relation of dutycycle and load weight, determine the load weight corresponding to current duty cycle.After the dutycycle of pwm control signal is set to zero, after cylinder gravitate slightly swings, get back to inactive state.The maximum amplitude of oscillation, by the impact presetting step pitch, can be limited within safe range by adjusting default step pitch, if there is child to creep into cylinder, can not damage because of the swing of weighing process intermediate roll by the maximum amplitude of oscillation of cylinder.
The embodiment of the present invention provides a kind of washing machine, and for performing the control method provided in embodiment corresponding to Fig. 1, shown in composition graphs 3, washing machine 3 comprises:
Cylinder 31 and motor 32, motor 32 rotates for head roll 31; Also comprise control device 30, described control device 30 comprises:
Signaling control unit 301, for when motor 32 remains static, to motor 32 input pulse width modulation (PWM) control signal, wherein, the initial duty cycle of pwm control signal is between the first critical dutycycle and the second critical dutycycle, first critical dutycycle for motor 32 under cylinder 31 no-load condition start rotate needed for minimum duty cycle, second critical dutycycle for cylinder 31 load for drive motors when preset weight 32 turns to minimum duty cycle needed for predetermined angle, preset weight is no more than 2.5 kilograms, and predetermined angle is no more than 90 °.
Signaling control unit 301, also for increasing the dutycycle of pwm control signal gradually according to default step pitch, wherein, default step pitch is no more than the difference of the second critical dutycycle and the 3rd critical dutycycle, the 3rd critical dutycycle for cylinder 31 load for drive motors when preset weight 32 start rotate needed for minimum duty cycle.
Signaling control unit 301, also for when motor 32 starts to rotate, obtains current duty cycle, and the input duty cycle of motor 32 is set to zero, make motor 32 stall.
Determining unit 302, for the default corresponding relation according to dutycycle and load weight, determines the load weight corresponding to the current duty cycle that signaling control unit 301 obtains.
Optionally, the control device 30 of washing machine 3 also comprises driving control unit 303, alternately changes along clockwise direction with counterclockwise at least twice implementation for the driving direction controlling motor 32.
Determining unit 302, determined at least two the load weight determination load weight averages of step also for weighing according at least twice execution.
Optionally, signaling control unit 301, also for controlling the initial duty cycle of pwm control signal, when performing the step of weighing the N time, the initial duty cycle of pwm control signal is less than the 4th critical dutycycle.Wherein the 4th critical dutycycle be the N-1 time perform weigh step time, the dutycycle of pwm control signal when motor 32 starts to rotate, N be greater than 1 integer.
Optionally, the control device 30 of washing machine 3 also comprises driver output unit 304, and for sending load Indication message to client and/or washer display unit, load Indication message is used to indicate the gravimetric value of cylinder 31 internal burden.Wherein, when performing the step of once weighing, the gravimetric value of load is load weight, and when the step that execution at least twice is weighed, the gravimetric value of load is load weight average.
Optionally, output unit 304, also for when the gravimetric value of cylinder 31 internal burden exceedes default upper loading limit, sends information warning to client.
The washing machine that embodiments of the invention provide, when motor remains static, pwm control signal is increased gradually according to default step pitch to motor input duty cycle, increase motor torque gradually, when torque is less, motor can not rotate by head roll, when torque reaches or exceed the critical value of head roll rotation, motor head roll starts to rotate, now obtain current duty cycle and the dutycycle of pwm control signal is set to zero, further according to the default corresponding relation of dutycycle and load weight, determine the load weight corresponding to current duty cycle.After the dutycycle of pwm control signal is set to zero, after cylinder gravitate slightly swings, get back to inactive state.The maximum amplitude of oscillation, by the impact presetting step pitch, can be limited within safe range by adjusting default step pitch, if there is child to creep into cylinder, can not damage because of the swing of weighing process intermediate roll by the maximum amplitude of oscillation of cylinder.
Above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. a control method for washing machine, described washing machine comprises cylinder and motor, and described motor rotates for driving described cylinder, it is characterized in that,
Perform the step of weighing at least one times, the step of wherein once weighing comprises:
When motor remains static, to described motor input pulse width modulation (PWM) control signal, wherein, the initial duty cycle of described pwm control signal is between the first critical dutycycle and the second critical dutycycle, described first critical dutycycle for described motor under described cylinder no-load condition start rotate needed for minimum duty cycle, described second critical dutycycle is for described cylinder load is for driving the minimum duty cycle needed for described electric machine rotation to predetermined angle when preset weight, described preset weight is no more than 2.5 kilograms, and described predetermined angle is no more than 90 °;
The dutycycle of described pwm control signal is increased gradually according to default step pitch, wherein, described default step pitch is no more than the difference of described second critical dutycycle and the 3rd critical dutycycle, described 3rd critical dutycycle for described cylinder load for drive when described preset weight described motor start rotate needed for minimum duty cycle;
When described motor starts to rotate, obtain current duty cycle, and the dutycycle of described pwm control signal is set to zero, make motor stalling, according to the default corresponding relation of dutycycle and load weight, determine the load weight corresponding to current duty cycle.
2. the control method of washing machine according to claim 1, is characterized in that, when the step that execution at least twice is weighed, when performing the step of weighing the N time, the initial duty cycle of described pwm control signal is less than or equal to the 4th critical dutycycle; Wherein said 4th critical dutycycle be the N-1 time perform weigh step time, the dutycycle of described pwm control signal when described motor starts to rotate, N be greater than 1 integer.
3. the control method of washing machine according to claim 1, is characterized in that, when the step that execution at least twice is weighed, the driving direction of described motor alternately changes along clockwise direction with counterclockwise at least twice implementation;
According to determined at least two the load weight determination load weight averages of step that at least twice execution is weighed.
4. the control method of washing machine according to claim 3, is characterized in that,
Send load Indication message to client and/or washer display unit after determining load weight, described load Indication message is used to indicate the gravimetric value of described cylinder internal burden; Wherein, when performing the step of once weighing, the gravimetric value of load is described load weight, and when the step that execution at least twice is weighed, the gravimetric value of load is described load weight average.
5. the control method of washing machine according to claim 4, is characterized in that,
When the gravimetric value of described cylinder internal burden exceedes default upper loading limit, send information warning to client and/or washer display unit.
6. a washing machine, described washing machine comprises cylinder and motor, and described motor rotates for driving described cylinder, and it is characterized in that, described washing machine also comprises control device, and described control device comprises:
Signaling control unit, for when motor remains static, to described motor input pulse width modulation (PWM) control signal, wherein, the initial duty cycle of described pwm control signal is between the first critical dutycycle and the second critical dutycycle, described first critical dutycycle for described motor under described cylinder no-load condition start rotate needed for minimum duty cycle, described second critical dutycycle is for described cylinder load is for driving the minimum duty cycle needed for described electric machine rotation to predetermined angle when preset weight, described preset weight is no more than 2.5 kilograms, described predetermined angle is no more than 90 °,
Described signaling control unit, also for increasing the dutycycle of described pwm control signal gradually according to default step pitch, wherein, described default step pitch is no more than the difference of described second critical dutycycle and the 3rd critical dutycycle, described 3rd critical dutycycle for described cylinder load for drive when described preset weight described motor start rotate needed for minimum duty cycle;
Described signaling control unit, also for when described motor starts to rotate, obtains current duty cycle, and the input duty cycle of motor is set to zero, make motor stalling;
Determining unit, for the default corresponding relation according to dutycycle and load weight, determines the load weight corresponding to the current duty cycle that described signaling control unit obtains.
7. washing machine according to claim 6, is characterized in that,
Described signaling control unit, also for controlling the initial duty cycle of described pwm control signal, when performing the step of weighing the N time, the initial duty cycle of described pwm control signal is less than the 4th critical dutycycle; Wherein said 4th critical dutycycle be the N-1 time perform weigh step time, the dutycycle of described pwm control signal when described motor starts to rotate, N be greater than 1 integer.
8. washing machine according to claim 6, is characterized in that,
The control device of described washing machine also comprises driving control unit, alternately changes along clockwise direction with counterclockwise at least twice implementation for the driving direction controlling described motor;
Described determining unit, determined at least two the load weight determination load weight averages of step also for weighing according at least twice execution.
9. washing machine according to claim 8, is characterized in that,
The control device of described washing machine also comprises driver output unit, and for sending load Indication message to client, described load Indication message is used to indicate the gravimetric value of described cylinder internal burden; Wherein, when performing the step of once weighing, the gravimetric value of load is described load weight, and when the step that execution at least twice is weighed, the gravimetric value of load is described load weight average.
10. washing machine according to claim 9, is characterized in that,
Described output unit, also for when the gravimetric value of described cylinder internal burden exceedes default upper loading limit, sends information warning to client.
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| CN108166208A (en) * | 2018-03-20 | 2018-06-15 | 江苏新安电器有限公司 | A kind of zero-g aerospace dynamical system in washer |
| CN110658855A (en) * | 2019-09-12 | 2020-01-07 | 九牧厨卫股份有限公司 | Airing machine stroke control method |
| CN112650065A (en) * | 2019-10-11 | 2021-04-13 | 青岛海尔洗衣机有限公司 | Remote control method of intelligent household appliance |
| CN112746431A (en) * | 2019-10-30 | 2021-05-04 | 青岛海尔智能技术研发有限公司 | Method and device for controlling washing machine and direct-current washing machine |
| CN113818200A (en) * | 2020-06-18 | 2021-12-21 | 合肥海尔滚筒洗衣机有限公司 | Laundry control method and device, electronic equipment and storage medium |
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| CN108166208A (en) * | 2018-03-20 | 2018-06-15 | 江苏新安电器有限公司 | A kind of zero-g aerospace dynamical system in washer |
| CN108166208B (en) * | 2018-03-20 | 2023-04-18 | 江苏新安电器有限公司 | Zero gravity aerospace washing machine power system |
| CN110658855A (en) * | 2019-09-12 | 2020-01-07 | 九牧厨卫股份有限公司 | Airing machine stroke control method |
| CN112650065A (en) * | 2019-10-11 | 2021-04-13 | 青岛海尔洗衣机有限公司 | Remote control method of intelligent household appliance |
| CN112746431A (en) * | 2019-10-30 | 2021-05-04 | 青岛海尔智能技术研发有限公司 | Method and device for controlling washing machine and direct-current washing machine |
| CN113818200A (en) * | 2020-06-18 | 2021-12-21 | 合肥海尔滚筒洗衣机有限公司 | Laundry control method and device, electronic equipment and storage medium |
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| CN105506918B (en) | 2017-08-29 |
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