CN105155188B - The Weighing method of frequency-changing rotary drum washing machine - Google Patents
The Weighing method of frequency-changing rotary drum washing machine Download PDFInfo
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- CN105155188B CN105155188B CN201510478379.1A CN201510478379A CN105155188B CN 105155188 B CN105155188 B CN 105155188B CN 201510478379 A CN201510478379 A CN 201510478379A CN 105155188 B CN105155188 B CN 105155188B
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- weighing
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- rotary drum
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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
- D06F17/00—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid
- D06F17/06—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers
-
- 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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- D06F2202/10—
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention discloses a kind of Weighing method of frequency-changing rotary drum washing machine, the Weighing method comprises the following steps：After instruction of weighing is received, frequency-changing rotary drum washing machine is run with beat of weighing；When beat is weighed in operation, frequency-changing rotary drum washing machine performs frequency converter weighing procedures and Hall step-by-step counting weighing procedures to be weighed respectively；Frequency-changing rotary drum washing machine obtains frequency converter weighing results and Hall step-by-step counting weighing results, and obtains final value of weighing according to frequency converter weighing results and Hall step-by-step counting weighing results.The Weighing method, suitable for weighing for full-load range, weighing precision can be improved.The invention also discloses a kind of Weighing method of frequency-changing rotary drum washing machine.
Description
Technical field
The invention belongs to electrical equipment manufacturing technology field, more particularly to a kind of Weighing method of frequency-changing rotary drum washing machine.
Background technology
With going deep into for converter technique research, and the reduction of related power device cost, variable-frequency driving technique is in household electrical appliances
Technical field is quickly popularized.Washing machine is based on converter technique as the big household electrical appliances of tradition, product frequency conversion, and exploitation more saves
The washing function of synergy, it is inevitable trend.
In washing machine development process, fuzzy weighing algorithm is a classical function, and weighing algorithm is different according to design principle,
A variety of multiprecision arithmetics are continued to use in product at present.Wherein, it is general to wash beat suddenly using calculating is single for non-frequency type
The mode of your pulse number, judges weighing results；For frequency conversion type, mainly there is frequency converter to weigh, Hall step-by-step counting and
The modes such as weighing sensor.It is higher using weighing sensor cost because household electric appliances are extremely sensitive for cost, thus not yet
It is extensive to use.For the rotary drum washing machine of common capacity section (6~12kg), no matter using a kind of weighing algorithm of any of the above,
Design requirement can be met.However, for Large Copacity section (14~20kg) rotary drum washing machine, weighing results can not then ensure.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention needs
A kind of Weighing method of frequency-changing rotary drum washing machine is proposed, the Weighing method can improve weighing precision.
The present invention also proposes the Weighing method of another frequency-changing rotary drum washing machine.
In order to solve the above problems, one aspect of the present invention proposes a kind of Weighing method of frequency-changing rotary drum washing machine, and this is weighed
Method comprises the following steps：After instruction of weighing is received, frequency-changing rotary drum washing machine is run with beat of weighing；Described in operation
Weigh beat when, the frequency-changing rotary drum washing machine performs frequency converter weighing procedures and Hall step-by-step counting weighing procedures to enter respectively
Row is weighed；And the frequency-changing rotary drum washing machine acquisition frequency converter weighing results and Hall step-by-step counting weighing results, and according to
The frequency converter weighing results and the Hall step-by-step counting weighing results obtain final value of weighing.
According to the Weighing method of the frequency-changing rotary drum washing machine of the present invention, using frequency converter weighting manner and Hall step-by-step counting
Weighting manner is combined the final value of weighing of acquisition, without increasing electrical part or sensor, without extra cost expense, you can meet
The requirement of weighing of Large Copacity frequency-changing rotary drum washing machine, weighs suitable for full-load range, and weighing precision improves.
Further, obtained according to the frequency converter weighing results and the Hall step-by-step counting weighing results and finally weighed
Value specifically includes：If the frequency converter weighing results are less than or equal to predetermined threshold value, the frequency converter weighing results pair
Answer the final value of weighing.If the frequency converter weighing results are more than predetermined threshold value, the Hall step-by-step counting result pair
Answer the final value of weighing.
Specifically, the predetermined threshold value corresponds to the half load amount of the frequency-changing rotary drum washing machine.
Specifically, the half load amount is between 7-10 kilograms.
Wherein, the frequency-changing rotary drum washing machine is specifically included with beat operation of weighing：S10, it is pre- that control impeller rotates forward first
If the time, stop the second preset time；S20, control the impeller to invert the first preset time, stop the second preset time；With
And S30, repeat step S10-S20, until end of weighing.
Specifically, first preset time is the 0.9-1.1 seconds, and second preset time is the 1.4-1.6 seconds.
In order to solve the above problems, another aspect of the present invention embodiment proposes a kind of side of weighing of frequency-changing rotary drum washing machine
Method, the Weighing method comprise the following steps：After instruction of weighing is received, frequency-changing rotary drum washing machine control impeller with rotate forward-
The beat operation of weighing of stopping-reversion-stopping；When the impeller is run with the beat of weighing, the frequency-changing rotary drum laundry
Machine performs frequency converter weighing procedures and Hall step-by-step counting weighing procedures to be weighed respectively；It is described after end of weighing
Frequency-changing rotary drum washing machine stops with beat operation of weighing, and obtains frequency converter weighing results and Hall step-by-step counting weighing results；
If the frequency converter weighing results are less than or equal to the half load amount of the frequency-changing rotary drum washing machine, the frequency converter is weighed knot
The corresponding value of finally weighing of fruit；And if the frequency converter weighing results are more than the half load amount, then the Hall pulsimeter
Number weighing results correspond to the final value of weighing.
According to the Weighing method of the frequency-changing rotary drum washing machine of the present invention, by by frequency converter weighting manner and Hall pulsimeter
Number two kinds of weighting manners of mode enter row set, according to the characteristics of frequency converter weighting manner, select weighing for frequency converter weighting manner
As a result or Hall step-by-step counting mode the corresponding value of finally weighing of weighing results, can be with suitable for weighing for full-load range
Improve weighing precision.
Brief description of the drawings
Fig. 1 is the flow chart of the Weighing method of frequency-changing rotary drum washing machine according to an embodiment of the invention；
(1) (2) (3) in Fig. 2 are the reasons according to weigh numerical value and the actual weight of the specific embodiment of the present invention
Think the fitting song of matched curve, the matched curve of the value of weighing obtained using frequency converter mode and the Weighing method using the present invention
The schematic diagram of line；
Fig. 3 is the flow chart according to the Weighing method of the frequency-changing rotary drum washing machine of another specific embodiment of the present invention；
And
Fig. 4 is the flow chart of the Weighing method of frequency-changing rotary drum washing machine according to still another embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
It is considered that for Large Copacity section (14~20kg) rotary drum washing machine, using special construction clutch, when impeller rotates
When, there is transfer situation in outer barrel, Hall step-by-step counting mode precision is affected；When load be it is fully loaded or close to full load conditions,
Motor is in saturation state, relies on the frequency converter weighing algorithm of the parameter of electric machine and can not accurately distinguish weight change, knot of weighing
Fruit precision can not ensure that the embodiment of the present invention proposes a kind of Weighing method of frequency-changing rotary drum washing machine, and the Weighing method can carry
High weighing precision.
The Weighing method of frequency-changing rotary drum washing machine according to embodiments of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the Weighing method of frequency-changing rotary drum washing machine according to an embodiment of the invention.
As shown in figure 1, the Weighing method comprises the following steps：
S1, after instruction of weighing is received, frequency-changing rotary drum washing machine is run with beat of weighing.
In one embodiment of the invention, when being weighed, frequency-changing rotary drum washing machine runs beat of weighing, for example,
S10, control impeller rotate forward the first preset time, stop the second preset time；S20, control impeller invert the first preset time, stopped
Only the second preset time；S30, repeat step S10-S20, until end of weighing.Wherein, the first preset time can be 0.9-
1.1 seconds, the second preset time can be the 1.4-1.6 seconds.
S2, when beat is weighed in operation, frequency-changing rotary drum washing machine performs frequency converter weighing procedures and Hall pulsimeter respectively
Weighing procedures are counted to be weighed.
In one embodiment of the invention, washing machine weighing process is made up of four beats of weighing, i.e., impeller rotates forward 1s,
Stop 1.5s, invert 1s, stop 1.5s, rotate forward 1s, stop 1.5s, invert 1s, stop 1.5s.Beat of weighing includes boost phase, stable fortune
Row order section, free parking stage composition.In boost phase, and stable operation stage, frequency converter feeds back quadrature axis current by detecting,
Frequency converter weighing results are drawn by integration；In the free parking stage, frequency converter stops controlling impeller, and impeller free-running operation is extremely
Stop, within the period, single Hall impulse hits is counted, Hall step-by-step counting is drawn according to count results fitting
Weighing results.
That is, when frequency-changing rotary drum washing machine is run with above-mentioned beat of weighing, frequency-changing rotary drum washing machine is claimed with frequency converter respectively
Double recipe formula and Hall step-by-step counting mode are weighed.
S3, frequency-changing rotary drum washing machine obtain frequency converter weighing results and Hall step-by-step counting weighing results, and according to frequency conversion
Device weighing results and Hall step-by-step counting weighing results obtain final value of weighing.
Specifically, the characteristics of being weighed according to frequency converter weighting manner and Hall step-by-step counting, using frequency converter weighting manner
The algorithm being combined with Hall step-by-step counting mode, for example, being influenceed according to weighting manner by load capacity, for certain load capacity
Hereinafter, to carry out weighing results using frequency converter weighting manner more accurate, and Hall pulse during for being weighed more than the load capacity
It is more accurate to count weighing results, both weighting manners are combined, more accurate weighing results can be selected as final
Weigh value, and then improve weighing precision, particularly with the Large Copacity section frequency-changing rotary drum washing machine using clutch particular design, this
The Weighing method of inventive embodiments can meet unloaded weighing to fully loaded full-load range, and the essence of weighing of certificates handling design requirement
Degree, at the same can compatible low capacity frequency-changing rotary drum washing machine demand of weighing.
As shown in Figure 2, Fig. 2 (1) is the ideal for the weigh numerical value and actual clothes weight of frequency-changing rotary drum washing machine
Matched curve P1, Fig. 2 (2) are weighed when frequency-changing rotary drum washing machine is weighed using frequency converter weighting manner numerical value and actual clothing
The matched curve P2 of thing weight, it can be seen that when load capacity is less than a certain gravimetric value, obtained using frequency converter weighting manner
Numerical value and the ideal of weighing value of weighing are consistent, and when more than the gravimetric value, it is inclined to obtain numerical value of weighing using frequency converter weighting manner
It is increasing from ideal value of weighing.
In one embodiment of the invention, if frequency converter weighing results are less than or equal to predetermined threshold value, now, adopt
Numerical value of the weighing numerical value of weighing corresponding with actual clothes weight obtained with frequency converter weighting manner meets, then frequency converter is weighed knot
The corresponding value of finally weighing of fruit, i.e., obtain final load weight according to frequency converter weighing results, for example, by inquiring about numerical value of weighing
Obtained with the corresponding table of load weight.Wherein, predetermined threshold value can be configured as the case may be, such as could be arranged to figure
The numerical value of weighing of turning point in 2 (2).
If frequency converter weighing results are more than predetermined threshold value, now, using frequency converter weighting manner obtain weigh numerical value with
Numerical bias of being weighed corresponding to actual clothes weight is larger, and the precision for the weighing results that Hall step-by-step counting weighting manner obtains
Of a relatively high, then the corresponding value of finally weighing of Hall step-by-step counting result, i.e., obtain final according to Hall step-by-step counting weighing results
Load weight.As shown in Fig. 2 (3), the matched curve P3 and ideal fit that are obtained using the Weighing method of the embodiment of the present invention
The comparison diagram of curve, wherein, A points are considered as the turning point i.e. predetermined threshold value of two kinds of weighting manners switching, it can be seen that P3 with
P2 is substantially completely overlapped, i.e., the numerical value of weighing obtained using the Weighing method of the embodiment of the present invention is connect very much in full-load range
Nearly numerical value of actually weighing.
In one embodiment of the invention, predetermined threshold value can correspond to the half load amount of frequency-changing rotary drum washing machine, for
The frequency-changing rotary drum washing machine half load amount of Large Copacity can be between 7-10 kilograms, such as predetermined threshold value is 8 kilograms.
Specifically, for the load capacity below half load, when impeller is run, the outer barrel of frequency-changing rotary drum washing machine follows impeller
Rotate, load change is difficult to differentiate between using the weigh weighing results of acquisition of Hall step-by-step counting mode, and use frequency converter
Weighting manner is weighed, and it is weaker that outer barrel follows impeller rotation-symmetric weight result to influence, and can ensure higher precision, so choosing
Select and the final corresponding clothes weight of weighing results acquisition is obtained using frequency converter weighting manner.
For load capacity more than half load, motor is in saturation or nearly saturation state, relies on the frequency converter of the parameter of electric machine
Weighting manner can not accurately distinguish weight change, and precision can not ensure, now, Hall step-by-step counting algorithm still possesses certain
Weighing precision, it can select to obtain final corresponding clothes weight using the weighing results of Hall step-by-step counting mode.
Based on described above, Fig. 3 is the side of weighing according to the frequency-changing rotary drum washing machine of the specific embodiment of the present invention
The flow chart of method, as shown in figure 3, the Weighing method comprises the following steps：
S100, receive instruction of weighing.
S110, execution are weighed beat, such as control impeller rotates forward 1 second-pause of-pause 1.5 seconds-reversion 1.5 seconds 1 second.
S120, weighed respectively in a manner of frequency converter weighting manner and Hall step-by-step counting, and return to frequency converter and weigh
As a result DataA and Hall step-by-step counting result DataB.
S130, judge whether to meet DataA≤120.120 be the predetermined threshold value of numerical value of weighing.If it is, into step
S140, otherwise into step S150.
The corresponding numerical value of finally weighing of S140, DataC=DataA, DataC.
S150, DataC=DataB.
Whether S160, judgement are weighed and are terminated, if terminated, into step S170, and otherwise return to step S110.
S170, return to the final numerical value DataC that weighs.
Sum it up, the Weighing method of the embodiment of the present invention, is weighed using frequency converter weighting manner and Hall step-by-step counting
The method that mode is combined, without increasing electrical part or sensor, without extra cost expense, you can meet Large Copacity frequency conversion ripple
The requirement of weighing of wheel washer, the Weighing method are Large Copacity section frequency-changing rotary drum washing machine particular design, while this method can be with
Compatible low capacity section frequency-changing rotary drum washing machine, the i.e. demand of weighing suitable for full-load range.
Based on described above, another aspect of the present invention embodiment also proposes a kind of Weighing method of frequency-changing rotary drum washing machine.
As shown in figure 4, the Weighing method comprises the following steps：
S200, after instruction of weighing is received, frequency-changing rotary drum washing machine control impeller is stopped with rotating forward-stopping-reversion-
Weigh beat operation.
S210, impeller with weigh beat operation when, frequency-changing rotary drum washing machine performs frequency converter weighing procedures and suddenly respectively
Your step-by-step counting weighing procedures are to be weighed.
S220, after end of weighing, frequency-changing rotary drum washing machine stops with beat operation of weighing, and obtains frequency converter and weigh
As a result with Hall step-by-step counting weighing results.
S230, if frequency converter weighing results are less than or equal to the half load amount of frequency-changing rotary drum washing machine, frequency converter is weighed
As a result final value of weighing is corresponded to.
S240, if frequency converter weighing results are more than half load amount, the corresponding final title of Hall step-by-step counting weighing results
Weight values.
The Weighing method of frequency-changing rotary drum washing machine according to embodiments of the present invention, by by frequency converter weighting manner and Hall
Two kinds of weighting manners of step-by-step counting mode enter row set, according to the characteristics of frequency converter weighting manner, select frequency converter weighting manner
Weighing results or Hall step-by-step counting mode the corresponding value of finally weighing of weighing results, suitable for the title of full-load range
Weight, can improve weighing precision.
In this specification description, described otherwise above any process or method description in flow chart or herein can be with
It is understood to, represents the generation for including the executable instruction of one or more the step of being used to realize specific logical function or process
Module, fragment or the part of code, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press
Order that is shown or discussing, including according to involved function by it is basic and meanwhile in the way of or in the opposite order, to perform
Function, this should be understood by embodiments of the invention person of ordinary skill in the field.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that by program the hardware of correlation can be instructed to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (6)
1. a kind of Weighing method of frequency-changing rotary drum washing machine, it is characterised in that comprise the following steps：
After instruction of weighing is received, frequency-changing rotary drum washing machine is run with beat of weighing；
When weighing beat described in operation, the frequency-changing rotary drum washing machine performs frequency converter weighing procedures and Hall pulsimeter respectively
Weighing procedures are counted to be weighed；And
The frequency-changing rotary drum washing machine obtains frequency converter weighing results and Hall step-by-step counting weighing results, and according to the frequency conversion
Device weighing results and the Hall step-by-step counting weighing results obtain final value of weighing, and specifically include：If the frequency converter claims
Weight result is less than or equal to predetermined threshold value, then the frequency converter weighing results correspond to the final value of weighing；Or if institute
State frequency converter weighing results and be more than predetermined threshold value, then the Hall step-by-step counting result corresponds to the final value of weighing.
2. the Weighing method of frequency-changing rotary drum washing machine as claimed in claim 1, it is characterised in that the predetermined threshold value is corresponding
The half load amount of the frequency-changing rotary drum washing machine.
3. the Weighing method of frequency-changing rotary drum washing machine as claimed in claim 2, it is characterised in that the half load amount is in 7-
Between 10 kilograms.
4. the Weighing method of frequency-changing rotary drum washing machine as claimed in claim 1, it is characterised in that the frequency-changing rotary drum laundry
Machine is specifically included with beat operation of weighing：
S10, control impeller rotate forward the first preset time, stop the second preset time；
S20, control the impeller to invert the first preset time, stop the second preset time；And
S30, repeat step S10-S20, until end of weighing.
5. the Weighing method of frequency-changing rotary drum washing machine as claimed in claim 4, it is characterised in that first preset time
For the 0.9-1.1 seconds, second preset time is the 1.4-1.6 seconds.
6. a kind of Weighing method of frequency-changing rotary drum washing machine, it is characterised in that comprise the following steps：
After instruction of weighing is received, frequency-changing rotary drum washing machine controls impeller to rotate forward-stop the section of weighing that-reversion-stops
Beat running；
The impeller with it is described weigh beat operation when, the frequency-changing rotary drum washing machine perform respectively frequency converter weighing procedures and
Hall step-by-step counting weighing procedures are to be weighed；
After end of weighing, the frequency-changing rotary drum washing machine stops with beat operation of weighing, and obtains frequency converter weighing results
With Hall step-by-step counting weighing results；
If the frequency converter weighing results are less than or equal to the half load amount of the frequency-changing rotary drum washing machine, the frequency converter claims
The corresponding value of finally weighing of weight result；And
If the frequency converter weighing results are more than the half load amount, described in the Hall step-by-step counting weighing results are corresponding
Final value of weighing.
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| CN107190475A (en) * | 2017-05-08 | 2017-09-22 | 无锡飞翎电子有限公司 | The fuzzy Weighing method and device of washing machine, washing machine |
| CN109267288A (en) * | 2017-07-17 | 2019-01-25 | 青岛海尔洗衣机有限公司 | Control method, control device and the washing machine of washing machine |
| CN111304874B (en) * | 2020-02-21 | 2023-02-28 | 无锡飞翎电子有限公司 | Control method and device of clothes treatment device and clothes treatment device |
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|---|---|---|---|---|
| CN1928579A (en) * | 2005-09-06 | 2007-03-14 | 海尔集团公司 | Electric motor load judgment method |
| CN101526388A (en) * | 2008-03-03 | 2009-09-09 | 海尔集团公司 | Self-weighing method for drum-type washing machine |
| CN102957368A (en) * | 2012-10-16 | 2013-03-06 | 上海三意电机驱动技术有限公司 | Special direct-current frequency converting control system for washing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950007070B1 (en) * | 1992-12-23 | 1995-06-30 | 엘지전자주식회사 | Detergent supply apparatus and method for washer |
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- 2015-08-06 CN CN201510478379.1A patent/CN105155188B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928579A (en) * | 2005-09-06 | 2007-03-14 | 海尔集团公司 | Electric motor load judgment method |
| CN101526388A (en) * | 2008-03-03 | 2009-09-09 | 海尔集团公司 | Self-weighing method for drum-type washing machine |
| CN102957368A (en) * | 2012-10-16 | 2013-03-06 | 上海三意电机驱动技术有限公司 | Special direct-current frequency converting control system for washing machine |
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