CN101526388B - Self-weighing method for drum-type washing machine - Google Patents
Self-weighing method for drum-type washing machine Download PDFInfo
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Abstract
The invention relates to a self-weighing method for a drum-type washing machine. Firstly, controlling a motor to reach a first preset speed and to rotate at the first preset speed constantly, and measuring the torque of the motor rotating constantly at the first preset speed; secondly, controlling the motor to accelerate from the first preset speed to a second preset speed, and measuring the accelerating torque of the motor accelerating from the first preset speed to the second preset speed; thirdly, controlling the motor to rotate constantly at the second preset speed, and measuring the torque of the motor rotating constantly at the second preset speed; and finally, working out a corresponding load torque by subtracting an average value of the torque of the motor rotating constantly at the first preset speed and the torque of the motor rotating constantly at the second preset speed from the accelerating torque of the motor accelerating from the first preset speed to the second preset speed according to the test results, and after a correction step, comparing the obtained load torque with a curve, pre-stored in a computer controller of the washing machine, of the corresponding relation of a load torque and a load weight to obtain a most similar weight data. The method has the advantages of high test accuracy and short test time.
Description
Technical field
The present invention relates to the method that a kind of roller washing machine is weighed automatically; Be particularly related to and a kind ofly accelerating to the different of required torque of certain rotating speed and torque when a certain speed at the uniform velocity turns round under the different loading conditions, thereby accurately detect the method that the roller washing machine of laundry item weight in the washing machine is weighed automatically through testing of electric motors.
Background technology
Washing machine comprises body, gate, tube, clothing tube, driving and control system are filled with water; Gate is positioned at front or the end face of body to open and close; The tube that is filled with water is fixed in the body through hitch, is the cylindrical shape of opening towards gate, and the clothing tube is installed in the tube that is filled with water; The rotation of drive systems motor, whole washing process of control system control washing machine.
Present user provides suitable water level in the laundry function of the time hoping to do washing according to the weight of clothing automatically, thereby avoids blindly selecting, and causes not wash clean or the situation generation of water wasting expense electricity; So; Present washing machine all has the function of automatic detection washing clothes weight, and the user chooses mode of washing as long as washing clothes is put in the clothing tube; And press starting switch; Washing machine will detect the weight that is placed into the washing clothes in the clothing tube automatically, adds the water that is complementary with laundry amount more automatically, just begins whole washing process then.
Wait to wash the method for laundry amounts for automatic detection; What roller washing machine generally adopted at present is the method that adds Weighing module; Like publication number is that the Chinese patent " a kind of Weighing method of washing machine and realize the washing machine of said method " of CN1690291 just discloses a kind of method of utilizing Weighing module to detect laundry amounts; This method is the air damp type that a resiliency supported vibration damper in the washing machine is made as the band displacement transducer; Form by the cylinder block of band abutment ring, ferromagnetic piston bar and the sealing ring that is fixed on coil former, coil, coil interface, band abutment ring and endoporus on the cylinder block; Displacement transducer is connected with microprocessor through Weighing module, and Weighing module comprises circuit and interfaces such as rectification, LPF, high-gain amplification, timing sequence generating, square wave, and then detects the weight of the laundry item in the washing machine.This utilization adds the method for Weighing module, and not only cost is high, and installs also relatively more difficult.
In addition, in order to improve accuracy of detection and to reduce cost, in the prior art, also have the roller washing machine utilization detect motor under the different loads condition rotating speed and reach parameters such as needed time of a certain rotating speed, voltage, carry out the detection of laundry amount.
Like notification number is the Chinese patent " tumbling-box washing machine " of CN1350086; A kind of detection method of washing weight is just disclosed; In the moment that begins to wash running; Through FEEDBACK CONTROL the rotating speed of motor is risen to after the 100rpm, under the power supply to motor is certain state, motor is quickened, the rotating speed that detects motor becomes the rise time till the 230rpm from 110rpm.Motor rises to after the 300rpm, makes it be free rotation state, and the rotating speed that detects motor drops to the fall time till the 200rpm from 290rpm.After this, detect the weight of washings with rise time and fall time.In this weight detecting, detect equilibrium state according to the ratio of rise time and fall time, according to this testing result correction weight, this kind method need be tested rotating speed rise time and rotating speed fall time respectively, can cause the time of test longer.
Publication number is the Chinese patent " method for sensing amount of laundry of washing machine " of CN1566458 for another example; It is in the washing machine that utilizes anti-phase motor direct-drive washing tube or stirrer; Comprise by the following stage and forming, if washing instruction input, the stage that stirrer is quickened are promptly arranged; The rotational speed of stirrer is reached the stage that the required time of setting speed carries out timing; The time that timing is obtained compares with the clothing scale of having set of separating by time, thereby detects the stage of laundry amounts.
And for example publication number is the Chinese patent " method of tumbling-box washing machine and detection clothes weight thereof " of CN1821477; It can calculate the ratio that is applied to the input voltage of motor through phased; Till motor reaches definite revolution, thus clothes weight or the centrifugal amount of clothing in the cylinder that accurately detection is contained in motor is connected.This tumbling-box washing machine comprises: motor is used to make the cylinder rotation; And control module, be used for controlling the revolution of this motor, and calculate the magnitude of voltage of the ratio of the input voltage that is applied to this motor, i.e. calculating change, to confirm to be contained in the clothes weight in this cylinder according to washing operation.
Above-mentioned these methods are in application, and very big the time, error may be bigger, do not reach the requirement of weighing automatically for less load or friction force.
Summary of the invention
Fundamental purpose of the present invention is to address the above problem, and provides a kind of detection time short, and treats the method that the roller washing machine of measuring clothes weight is weighed automatically in can the high Precision Detection washing machine.
Be realization foregoing invention purpose, the method that provides a kind of roller washing machine to weigh automatically in the present invention,
Washing machine preestablishes first desired speed, second desired speed of motor, and the corresponding relation parameter of electric motor load torque and load weight, and weighing automatically comprises the steps:
First step, the control motor makes motor reach first desired speed, and motor is at the uniform velocity rotated with first desired speed, measures the torque of motor this moment;
Second step, the control motor makes motor accelerate to second desired speed from first desired speed, measures the rising torque of motor when first desired speed rises to second desired speed;
Third step, the control motor at the uniform velocity rotates with second desired speed, measures the torque of motor this moment;
The 4th step; Testing result according to above-mentioned first step to third step; Calculate corresponding load torque, said load torque is based on that the resulting difference of mean value that the rising torque that rises to second desired speed from first desired speed with said motor deducts the torque of at the uniform velocity rotating with first desired speed and second desired speed confirms;
The 5th step according to the load torque that calculates, is further confirmed the load weight of washing machine.
Further improvement of the present invention is; In above-mentioned first step, also comprise: before the control motor reaches first desired speed; Comprise that also controlling motor earlier for one makes motor reach three desired speed higher than second desired speed, is decelerated to the process of first desired speed again.
In above-mentioned first step, the control motor makes motor after beginning startup, reaches the 3rd desired speed with peak acceleration.
In above-mentioned second step, the control motor makes motor reach second desired speed with peak acceleration from first desired speed.
Preferably, comprise also in above-mentioned the 4th step that is revised a step: after calculating a load torque, repeat at least once above-mentioned first to fourth step again, the load torque numerical value that at every turn draws is averaged, as final load torque.
The load weight of the washing machine in above-mentioned the 5th step; Be based on the said load torque that calculates and compare, thereby determine a weight data the most akin with the load torque and the corresponding relation curve of load weight that have deposited in the washing machine computer controller.
Content to sum up, the present invention through testing of electric motors in required torque that accelerates to certain rotating speed under the different loading conditions and the torque when a certain speed at the uniform velocity turns round, the torque that the torque that records when rising records when deducting at the uniform velocity; Just obtain the torque of load when motor rotates; Through calculating the weight just can obtain load, this kind method solved better little load current change not obvious and load more for a long time friction force greatly, the bigger problem of measuring of numerical value deviation; Thereby make weigh automatically more accurate; Precision is higher, adopts this kind method to shorten the test duration in addition, just can measure data exactly about 30 seconds.
Before the control motor reaches first desired speed; Having increased elder generation's control motor makes motor reach three desired speed higher than second desired speed; Be decelerated to the process of first desired speed again; Can make the interior clothing of doing of clothing tube well being affixed under the bigger centrifugal action on the inwall of clothing tube like this, not only can improve accuracy of detection, also can shorten detection time in addition.
In the process that the clothing in the clothing tube is weighed automatically, the equilibrium state of clothing may not be certain in the clothing tube, even the clothing of identical weight; Because the difference of equilibrium state; Torque and the rising torque of its motor when at the uniform velocity rotating be difference to some extent all, causes the reduction of accuracy of detection for fear of this species diversity, so the present invention has increased the step of a correction; Just adopted repeated detection to calculate load torque; The method of averaging then so just is enough to revise because the detection deviation that difference caused of equilibrium state further improves accuracy of detection.
Description of drawings
Fig. 1 is the structural representation of a kind of roller washing machine of the present invention;
Fig. 2 is a process flow diagram of the present invention;
Fig. 3 is the graph of relation of load torque and load weight.
Extremely shown in Figure 3 like Fig. 1, body 1, gate 2, the tube 3 that is filled with water, clothing tube 4, motor 5, supply channel 6, discharge pipe line 7, draining valve 8, water intaking valve 9.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As shown in Figure 1, washing machine comprises body 1, gate 2, tube 3, clothing tube 4, control panel, driving and control system are filled with water.Body 1 whole rectangular casing shape, gate 2 is arranged on its positive middle part, and the tube 3 that is filled with water is fixed in the body 1 through hitch; Be the cylindrical shape of opening towards gate 2, clothing tube 4 is installed in the tube 2 that is filled with water, and opens clothing that gate 2 just can input will be washed in clothing tube 4 perhaps with its taking-up; Control panel is arranged on the surface of body 1, is used for the selection that the user carries out washing procedure, and drive system can be rotated by drive motor 5; Clothing tube 4 is connected through the rotating shaft of bearing with motor 5; Therefore drive motor 5 rotates and just can directly drive 4 rotations of clothing tube, thus the clothing in the washing clothes tube 4, whole washing process of control system control washing machine; According to the laundry amounts that detects by control module, water level and the program for washing set according to the user, Automatic Control program for washing.
During laundry; At first open gate 2, in clothing tube 4, drop into the clothing that needs washing, drop into washing powder in the washing powder input port on being located at supply channel 6 then; The energized switch; The user according to the kind select operating mode of washings, imports the instruction of start-up operation on control panel, the washing machine control system promptly begins to control whole operating process.
After program for washing starts; At first to detect the laundry amounts of putting in the clothing tube 4; Open water intaking valve 9 then, in the tube 3 that is filled with water, infeed the washings that are mixed with washing powder through supply channel 6, water inlet lasts till that always water reaches till the water level that is complementary with detected laundry amounts.
When the water level in washing machine is filled with water tube 3 did not reach designated water level, water intaking valve 9 was opened always, and when water level reached designated water level, control module will send steering order water intaking valve 9 is closed, thereby stopped in the tube 3 that is filled with water, to supply water.At this moment, joining the water of tube in 3 that are filled with water can be absorbed by the clothings in the clothing tube 4, and the water levels in the tube 3 that is filled with water can descend, therefore, also need with above identical method replenish water inlet, up to the water level that reaches regulation fully.
After the water level in the tube 3 that is filled with water reached predetermined water level, washing machine just can begin washing procedure, and after washing operation was accomplished, the tube 3 following draining valves 8 that are filled with water will be opened, and the washings in the tube 3 that is filled with water are discharged, and then carry out dehydrating operations.
Carried out once more draining valve 8 cutting out behind the official hour at dehydrating operations, opened water intaking valve 9, in the tube 3 that is filled with water, added new water, begun to carry out rinse operation.
After the rinse operation of having carried out the stipulated time, carry out dehydrating operations again, said process repeatedly is all over last powered-down switch, end operation to all laundry operations processes.
With reference to Fig. 2 and Fig. 3 workflow of the present invention is described below.
The user opens gate 2 earlier; In clothing tube 4, drop into the clothing that needs washing, close gate 2, drop into washing powder in the washing powder input port on being located at supply channel 6 then; The energized switch; The user according to the kind select operating mode of washings, imports the instruction of start-up operation on control panel, the washing machine control system promptly begins to control whole operating process.
After program for washing starts, at first to detect the laundry amounts of putting in the clothing tube 4, at this moment; CPU on the computer controller in the washing machine control system sends the instruction of weighing and gives the frequency conversion plate; After CPU on the frequency conversion plate receives instruction, start working, get into the program of weighing through CPU drive motor 5.
Washing machine preestablishes first desired speed, second desired speed of motor 5, and the corresponding parameters relationship curve of motor 5 load torques and load weight, and deposits in the washing machine computer controller, and concrete steps are following:
First step: at first; Drive motor 5 starts; Drive 4 rotations of clothing tube, motor 5 is carried out FEEDBACK CONTROL, so that the rotating speed of motor 5 rapidly increases to the 3rd desired speed (for example being 300rpm); Make the washing clothes in the clothing tube 4 be attached to preferably on the circumferential inner wall of clothing tube 4 owing to action of centrifugal force; For can be better, more quickly washing clothes is attached on the circumferential inner wall of clothing tube 4, simultaneously also in order to shorten detection time, can control motor 5 and rise to the 3rd desired speed (300rpm) with peak acceleration.
Then; Control the rotating speed of motor 5 again and reduce to first desired speed (for example being 100rpm) with maximum deceleration; At this moment, also can descend, and control motor 5 at the uniform velocity turns round at first desired speed (100rpm) with the acquiescence retarded velocity of motor 5; Measure the torque M 1 of motor 5 this moment through torque master, and store torque M 1.
Second step: control motor 5 makes motor 5 accelerate to second desired speed (for example being 150rpm) from first desired speed (100rpm); Measure the rising torque M 3 of motor 5 when first desired speed (100rpm) rises to second desired speed (150rpm), and storage torque M 3.
When first desired speed (100rpm) rises to second desired speed (150rpm), can control motor 5 and rise with peak acceleration, also can rise with the acquiescence acceleration of motor.
Third step: control motor 5 at the uniform velocity rotates with second desired speed (150rpm), measures the torque M 2 of motor 5 this moment through torque master, and stores torque M 2.
The 4th step: according to the testing result of above-mentioned first step to third step, calculate corresponding load torque M, the following formula of the foundation of load torque M calculates:
M＝M3-(M1+M2)/2
Under perfect condition; Just can judge according to the above-mentioned load torque M that testing result drew once, but the equilibrium state of the clothing in the clothing tube 4 may not be certain, even the clothing of identical weight the clothing tube in the clothing tube 4; Because the difference of equilibrium state; Torque and the rising torque of its motor when at the uniform velocity rotating be difference to some extent all, causes the reduction of accuracy of detection for fear of this species diversity, so the present invention has increased the step of a correction.
The step of revising comprises: after calculating a load torque M through preceding four steps; Repeat at least once above-mentioned first to fourth step again; Comparatively ideal situation is to repeat above-mentioned steps again twice, and I haven't seen you for ages can not get comparatively ideal correction result for number of times, and number of times is crossed at most can prolong detection time.
The numerical value of the load torque M that at every turn draws is averaged, as final load torque M '.
The 5th step:, further confirm the load weight G of washing machine according to the load torque M ' that calculates.
The load weight G of washing machine is based on the said load torque M ' that calculates and compares with the load torque and the corresponding relation curve of load weight that deposit in the washing machine computer controller, thereby determines a weight data the most akin.
As shown in Figure 3, the corresponding relation curve of load torque and load weight draws through comparison test repeatedly, and deposits in advance in the washing machine computer controller, and the horizontal ordinate among Fig. 3 is a load weight, and ordinate is a load torque.
The present invention is set at 100rpm and 150rpm respectively with first desired speed and second desired speed; Be not specific numerical value; First desired speed can be set in any number between the 100rpm to 150rpm; Second desired speed can correspondingly be set at any number between the 150rpm to 200rpm, and 100rpm and 150rpm are most preferred numerical value, and accuracy of detection can be higher.
In first step; At first the rotating speed with motor 5 rises to the 3rd desired speed (300rpm) with peak acceleration; The 3rd desired speed is set at than second desired speed (150rpm) height; Be in order the clothing in the clothing tube 4 to be affixed on the inwall of clothing tube 4 better, further to improve accuracy of detection.
Washing machine just can be confirmed the corresponding standard water level according to laundry amounts after detecting the weight of laundry item according to above-mentioned steps, and then begins all washing procedures.
As stated, in conjunction with accompanying drawing and the given scheme content of embodiment, can derive the similar techniques scheme.In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (6)
1. method that roller washing machine is weighed automatically, it is characterized in that: washing machine preestablishes first desired speed, second desired speed of motor, and the corresponding relation parameter of electric motor load torque and load weight, and weighing automatically comprises the steps:
First step, the control motor makes motor reach first desired speed, and motor is at the uniform velocity rotated with first desired speed, measures the torque of motor this moment;
Second step, the control motor makes motor accelerate to second desired speed from first desired speed, measures the rising torque of motor when first desired speed rises to second desired speed;
Third step, the control motor at the uniform velocity rotates with second desired speed, measures the torque of motor this moment;
The 4th step; Testing result according to above-mentioned first step to third step; Calculate corresponding load torque, said load torque is based on that the resulting difference of mean value that the rising torque that rises to second desired speed from first desired speed with said motor deducts the torque of at the uniform velocity rotating with first desired speed and second desired speed confirms;
The 5th step according to the load torque that calculates, is further confirmed the load weight of washing machine.
2. the method that roller washing machine according to claim 1 is weighed automatically is characterized in that, also comprises in the above-mentioned first step:
Before the control motor reaches first desired speed, comprise that also controlling motor earlier for one makes motor reach three desired speed higher than second desired speed, is decelerated to the process of first desired speed again.
3. the method that roller washing machine according to claim 2 is weighed automatically is characterized in that: in above-mentioned first step, the control motor makes motor after beginning startup, reaches the 3rd desired speed with peak acceleration.
4. the method for weighing automatically according to any described roller washing machine of claim 1 to 3 is characterized in that: in above-mentioned second step, the control motor makes motor reach second desired speed with peak acceleration from first desired speed.
5. the method that roller washing machine according to claim 1 is weighed automatically; It is characterized in that; Comprise also in above-mentioned the 4th step that is revised a step: after calculating a load torque; Repeat at least once above-mentioned first to fourth step again, the load torque numerical value that at every turn draws is averaged, as final load torque.
6. the method for weighing automatically according to claim 1 or 5 described roller washing machines; It is characterized in that: the load weight of the washing machine in above-mentioned the 5th step; Be based on the said load torque that calculates and compare, thereby determine a weight data the most akin with the load torque and the corresponding relation curve of load weight that have deposited in the washing machine computer controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100076363A CN101526388B (en) | 2008-03-03 | 2008-03-03 | Self-weighing method for drum-type washing machine |
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| CN2008100076363A CN101526388B (en) | 2008-03-03 | 2008-03-03 | Self-weighing method for drum-type washing machine |
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| CN101526388A CN101526388A (en) | 2009-09-09 |
| CN101526388B true CN101526388B (en) | 2012-03-07 |
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| CN2008100076363A Active CN101526388B (en) | 2008-03-03 | 2008-03-03 | Self-weighing method for drum-type washing machine |
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| CN102538922A (en) * | 2011-12-31 | 2012-07-04 | 无锡小天鹅股份有限公司 | Weighing method of rolling drum washing machine driven by asynchronous motor |
| CN102733142A (en) * | 2012-06-26 | 2012-10-17 | 无锡小天鹅股份有限公司 | Device and method for detecting unbalance of washing machine |
| WO2014186992A1 (en) * | 2013-05-23 | 2014-11-27 | 无锡小天鹅股份有限公司 | Method for judging weight of clothes for series motor drum washing machine |
| JP6435138B2 (en) * | 2014-08-29 | 2018-12-05 | アクア株式会社 | Drum washing machine |
| CN105671848B (en) * | 2014-11-21 | 2017-12-26 | 无锡小天鹅股份有限公司 | Washing machine and the method for judging washing machine load weight |
| CN105155188B (en) * | 2015-08-06 | 2018-03-16 | 无锡飞翎电子有限公司 | The Weighing method of frequency-changing rotary drum washing machine |
| CN106480660B (en) * | 2015-08-28 | 2020-03-17 | 青岛海尔洗衣机有限公司 | Load gear correction method and equipment for executing same |
| CN105256508A (en) * | 2015-10-30 | 2016-01-20 | 珠海格力电器股份有限公司 | Weighing method and device of washing machine |
| CN106544814B (en) * | 2016-09-30 | 2019-01-18 | 无锡小天鹅股份有限公司 | Washing machine and its wet cloth weighing method and device |
| CN106757974B (en) * | 2016-11-24 | 2019-02-12 | 四川长虹电器股份有限公司 | A kind of clothing weighing method of roller washing machine |
| CN109100005B (en) * | 2017-06-21 | 2021-06-11 | 苏州三星电子有限公司 | Clothes weight sensing method and system |
| KR102603457B1 (en) * | 2017-12-01 | 2023-11-17 | 엘지전자 주식회사 | Dryer and method for clothes |
| CN108611813B (en) * | 2018-05-05 | 2019-03-19 | 郑凯怡 | A kind of roller washing machine with function of weighing |
| CN108755008B (en) * | 2018-06-14 | 2021-03-16 | 广东威灵电机制造有限公司 | Load inertia detection method, system and device of clothes treatment device |
| CN109620094A (en) * | 2018-11-15 | 2019-04-16 | 浙江欧琳生活健康科技有限公司 | A kind of dish-washing machine and its control method |
| CN112176644B (en) * | 2019-06-12 | 2023-07-04 | 青岛海尔洗衣机有限公司 | Load weighing method for drum washing machine and drum washing machine |
| CN110940402A (en) * | 2019-12-10 | 2020-03-31 | 厦门恩格节能科技有限公司 | Garbage hanging garbage weighing method, terminal equipment and storage medium |
| CN114575094A (en) * | 2020-12-01 | 2022-06-03 | 苏州三星电子有限公司 | Clothes washing method and system and washing machine |
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| CN1396330A (en) * | 2001-07-10 | 2003-02-12 | Lg电子株式会社 | Device and method for measuring clothes weight in washing machine |
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Effective date of registration: 20160712 Address after: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee after: Qingdao Haier Washing Machine Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Patentee before: haier group corporation Patentee before: Qingdao Haier Washing Machine Co., Ltd. |