CN102115969A - Method for judging floating state of inner barrel by utilizing power change of motor - Google Patents
Method for judging floating state of inner barrel by utilizing power change of motor Download PDFInfo
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- CN102115969A CN102115969A CN2011100426759A CN201110042675A CN102115969A CN 102115969 A CN102115969 A CN 102115969A CN 2011100426759 A CN2011100426759 A CN 2011100426759A CN 201110042675 A CN201110042675 A CN 201110042675A CN 102115969 A CN102115969 A CN 102115969A
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Abstract
The invention relates to a method for judging the floating state of an inner barrel by utilizing the power change of a motor, belonging to the field of washing machines. The method for judging the floating state of the inner barrel comprises the following steps in sequence: (1) water is injected in a washing machine till the water reaches an initial starting water level; (2) a computer program controller is used for starting a motor to run at fixed time intervals; (3) the CPU (central processing unit) of the computer program controller is used to measure the current and voltage when the motor is started and calculate the starting power of the motor; (4) the step 2 and step 3 are repeated for two or three times to calculate the average value of the starting power; and (5) the step 2, step 3 and step 4 are repeated, and simultaneously, the average value of measured power of the previous time is subtracted from the average value of measured power of the later time, and the difference is used for judging the floating state of the inner barrel; when the difference is larger than 0, the inner barrel is not floated up; and when the difference is smaller than 0, the inner barrel is floated up. The method for judging the floating state of the inner barrel utilizes the characteristic that the motor has different load and hereby outputs different power to judge whether the inner barrel is floated up, is simple, and avoids abnormal heating of the motor and damage of parts such as splines on a gear and the like.
Description
Technical field
The present invention relates to the washing machine field, be specifically related to a kind of detection method of utilizing the interior bucket float state of the buoyancy washing machine that bucket rises in the control of water buoyancy.
Background technology
The working method of washing machine has multiple situation in the prior art, and as shown in Figure 1, wherein having a kind of is to utilize the water that constantly injects in the urceolus to realize the interior bucket 1 clutch working method of floating.In this working method, the running of motor direct-drive impeller does not need to slow down and arrangement of clutch.Its operation principle is: in interior bucket 1 bottom cavity 2 and spline 3 are set, when the water in the urceolus enters certain water yield, the cavity at the interior bucket end can be stored a certain amount of air and form air chamber, the buoyancy that produces can play interior barrel, the spline of bucket bottom breaks away from the spline gear 4 on the motor shaft in making, the motor of computer programmed controller controls only drives the impeller rotation like this, finish rotating washing work, interior bucket loss of buoyance after draining falls, the spline engagement at the spline gear on the motor shaft and the interior bucket end, this moment, the rotation of motor shaft will drive impeller and the common rotation of interior bucket, realized the dehydration of clothing.This scheme can alleviate weight, the simplification arrangement of clutch of washing machine, reduces cost.
But there is following problems in this type of washing machine, for the interior bucket that utilizes the buoyancy come-up, it rises and does not only rely on the water yield, also relevant with what, the spline of interior bucket bottom and the engagement tightness of motor shaft spline gear etc. of the size of the weight of interior bucket own, buoyancy chamber, laundry amount, interior barrel rising can not be controlled automatically.If bucket does not float in during washing, the spline and the spline gear on the motor shaft of interior bucket bottom are in engagement always, water and clothing that the output of motor at this moment will drive in impeller, interior bucket and the interior bucket turn round together, needed power just increases, the resistance that is motor rotation becomes big, just might make motor break down this moment, or exceed the rated power of motor and can not work.And when interior bucket floats, the spline of interior bucket bottom breaks away from the spline gear on the motor shaft, interior bucket is floating state, at this moment the output of motor only need drive impeller and drive the interior clothing running of bucket, the resistance that is subjected to will obviously diminish, and this operate as normal that not only helps motor can also prolong the service life of motor.In addition, interior bucket does not wash when floating, and also can produce bigger noise, and internally the spline of bucket bottom and the spline gear on the motor shaft produce and destroy.Therefore, whether bucket floats in must judging before washing, and the interior bucket that does not float is taken appropriate measures it is floated to finish normal washing work.
Summary of the invention
Can not judge the problem of whether floating at work for solving in the prior art the interior bucket of buoyancy washing machine, the detection processing method that the invention provides whether a kind of interior bucket that can determine buoyancy washing machine floats and can handle the interior bucket that does not float.Concrete scheme is as follows: a kind of method of utilizing power of motor to change bucket floating state in the judgement, it is characterized in that, and comprise the steps:
Electric current, the voltage when CPU of step 3, computer program controller measures electric motor starting also calculates the starting power of motor;
Step 4, repeating step 2-3 two to three times calculate the mean value of starting power;
Step 5, repeating step 2-4 utilize institute's lining average once before back mean value deducts simultaneously, the float state in judging with both differences barrel, and determination methods is as follows:
Step 51, both difference are greater than 0, and bucket does not float in then showing, continue to carry out above-mentioned determining step;
Step 52, both difference are less than 0, and bucket floats in then showing, enters next step washing procedure.
Another preferred version of the present invention: when water arrives water level and interior bucket when not floating yet, start the shake current program of set point number, make motor left rotation and right rotation 3-5 time, whether the step of reruning 2-5, float with in determining barrel:
Step 21, do not float yet as interior bucket, then computer program controller sends warning message to the user;
Step 22, float as interior bucket, then washing machine covers water to water level, enters next step washing procedure.
Another preferred version of the present invention: the setting priming level of described step 1 be lower than the water level of washing machine and buoyancy of water be not enough to float in water level during bucket.
Another preferred version of the present invention: the Fixed Time Interval in the described step 2 is 1000ms-1500ms.
Another preferred version of the present invention: the rotation direction of motor is a clockwise direction in the described step 2.
Another preferred version of the present invention: optimal way is in the described step 52, when the double result who subtracts each other all less than 0 the time, the information that bucket floats in just providing.
Another preferred version of the present invention: in the described step 52, when difference for the first time occurring less than 0 the time, keep minuend and be fixing minuend, the follow-up power that records only subtracts each other with fixing minuend.
The present invention utilizes motor because load is different, determine whether interior bucket floats thereby starting power is different, when interior bucket does not float, motor not only will drive the interior bucket rotation that the water rotation also will drive engagement when starting, this needs bigger starting power just can finish, equally, after interior bucket floats, motor only need drive the rotation of water and clothing and get final product, this moment, motor only needed the power of less startup to get final product, the starting power that calculate front and back is subtracted each other, and whether bucket floats in can determining according to the variation of difference.For preventing error, this programme also further adopts repeatedly the starter motor running, calculates the test mode of mean power, thereby guarantees the accurate of test result.This programme has prolonged the life-span of motor for washer greatly, and the problem of having avoided motor to carry out work when interior bucket does not float has reduced power consumption and the caloric value of motor.Utilize shake current program to overcome interior bucket upper spline groove and driving shaft upper spline gear meshing power, quickened the come-up of interior bucket.This programme test process is simple, does not need to increase new equipment, helps computer program controller of washing machine to understand the ascending and descending condition of current interior bucket, for fully-automatic washing control provides convenience.
Description of drawings
The structural representation of keg float washing machine in Fig. 1 prior art.
The deterministic process schematic diagram of Fig. 2 embodiments of the invention 1.
The specific embodiment
As shown in Figure 1, because washing machine is the float bowl-type structure, air chamber 2 is arranged at interior bucket 1 bottom, when washing machine inflow, if the buoyancy of the water generates of advancing is not enough to the clothing of interior bucket and the inside is floated, the spline 3 on the interior bucket is in engagement with the spline gear 4 on the motor shaft always, if starter motor running work this moment, motor not only will drive water in the bucket and clothing running in the impeller drive, but also barrel running together in will driving, desired power is very big.If continue water inlet, when the buoyancy of the water generates that enters is enough big, in the time of the clothes of interior bucket and the inside being floated, the spline of interior bucket bottom breaks away from the spline gear on the motor shaft, the floating free floating condition that is of interior bucket.At this moment motor only need drive water in the bucket and clothing running in the impeller drive, and the resistance of motor will obviously diminish, and barrel required power of running will diminish in the driven by motor.Therefore, under the same conditions, motor with the load difference, starting power is just different, loads when big, the starting power of motor is just big, on the contrary, load hour, the starting power of motor is just little.If interior bucket is floating, even there is water constantly to inject, motor is under the constant situation of loading, and starting power also can remain unchanged substantially.As long as at this moment measure the variation of electric motor starting power, whether bucket floats in just can judging.
This programme is set the initial priming level of motor, the initial priming level of motor be meant one not only can alleviate the heating of motor but also guarantee to intake this water level the time in the bucket water level that can not float.The initial priming level of this motor need be lower than the water level that washing machine is set, and this height of water level can change according to the size of washing machine drum, need record in advance according to different washing capacities, generally is 2 or 3 water levels.The computer program controller drive motors is rotated with the set time in a clockwise direction, and electric current and voltage when measuring electric motor starting calculate the power of motor when starting.The motor clockwise direction rotates, and is that current can flow in bucket with clockwise direction, therefore adopt starter motor to rotate in a clockwise direction, can reduce the influence of extraneous factor to motor, reduce the situation of motor overheating because in most washing machines during water filling.Behind the certain interval of time, this generally is set at 1000ms-1500ms at interval, continuing drive motors rotates the same time under same condition, calculate its starting power simultaneously, the average power content that utilizes back one to measure then deducts the average power content of measuring for the first time, and whether bucket floats in can determining according to the size of difference.Because bucket does not float (this is a special setting) in during initial priming level, so the load of motor this moment is big, and corresponding starting power is also big.Motor because the water filling of washing machine does not stop in the measuring process always, two kinds of situations at this moment just may occur when rotating for the second time:
1, not enough interior bucket is floated because the water in the washing machine increases, the power of motor value that calculate this moment increases to some extent, deducts primary performance number gained missionary society greater than 0 with secondary performance number, barrel does not float in promptly showing.
2, the water of being on the increase in the washing machine can float interior bucket, this moment, the rotation of motor only need drive the rotation of water and clothing, alleviated load greatly, therefore the power during electric motor starting is less than for the first time or performance number last time, with the second time performance number deduct for the first time or last time performance number gained difference can show that promptly interior 1 barrel floats less than 0.The groundwork process and the principle of Here it is this programme.
For reducing the error of above-mentioned deterministic process, can repeat above-mentioned steps 2-3 time, whether bucket floats in judging according to final average result.When the water in the washing machine arrives water level and when barrel whether floating can't determine in, then stop into water, computer program controller of washing machine can move shake current program, be that drive motors is with the engagement force between left rotation and right rotation 3-5 circle cogs with bucket in overcoming and outer bucket at a slow speed, bucket come-up in helping, in this process, continue to calculate in a manner described the starting power value, and the starting power value of calculating compared with the performance number of front as minuend, barrel whether float in determining with same judgment mode.If result of determination for floating, then continues to be filled to water level, enter next washing procedure.If result of determination be interior bucket still for floating, then computer program controller sends warning message and notifies user or attendant.Above-mentioned shake current program can be moved 2-3 time, floats with bucket in guaranteeing.
Accurate for guaranteeing the result who records, when for the first time occur difference less than 0 as a result the time, the minuend that is about to this moment is when fixing minuend, the performance number of calculating all goes to subtract fixedly minuend later on, as twice of continuous appearance or above difference all less than 0 o'clock, the information that bucket floats in providing.
Embodiment 1:
As shown in Figure 2, be the workflow of this programme, at first washing machine inflow is to the initial priming level of motor, and then with fixing acceleration, starter motor detects the electric current I and the voltage U of motor at this moment, utilizes P=U*I to calculate the starting power of this motor.For the measurement result of preparation is provided, can repeat said process 2-3 time, utilize the average power content after Pn=1/N ∑ Pi obtains calculating several times, with the time interval double counting said process of 1200ms 2-3 time, by beginning for the second time, the average power content of once calculating before at every turn utilizing the average power content of calculating later to deduct, be Pn-(Pn-1)＜0 o'clock (n for which time measures), bucket floats in determining, record minuend Pn-1 conduct at this moment is minuend fixedly, and then move above-mentioned process of measurement 2-3 time, the electric motor starting power that at every turn records is all subtracted each other with fixing minuend Pn-1, and when two times result occurring all less than 0 the time, bucket floats in then concluding, this moment, washing machine continued moisturizing to water level, entered next washing procedure.
When Pn-(Pn-1)＞0, bucket does not float in judging, continue above-mentioned motor rotation program when water level arrives water level and barrel whether floats in still can not determine, then stop water filling, operation shake current program, the operation computational process of then carrying out a front after the current program is once shaken in every execution, when the emergent power difference less than 0 the time, rerun computational process once or twice, bucket floats in determining with the identical difference result of twice or three times, and the washing machine moisturizing is to water level then.When whether bucket floated in aforesaid way also can't be determined, computer program controller sent warning message to user or attendant.
Claims (7)
1. a method of utilizing power of motor to change bucket floating state in the judgement is characterized in that, comprises the steps:
Step 1, washing machine is carried out water filling, and set an initial priming level of motor, when water filling arrives this initial priming level;
Step 2, press Fixed Time Interval starter motor operation;
Electric current, the voltage when CPU of step 3, computer program controller measures electric motor starting also calculates the starting power of motor;
Step 4, repeating step 2-3 two to three times calculate the mean value of starting power;
Step 5, repeating step 2-4 utilize institute's lining average once before back mean value deducts simultaneously, the float state in judging with both differences barrel, and determination methods is as follows:
Step 51, both difference are greater than 0, and bucket does not float in then showing, continue to carry out above-mentioned determining step;
Step 52, both difference are less than 0, and bucket floats in then showing, enters next step washing procedure.
2. a kind of method of utilizing power of motor to change bucket floating state in the judgement as claimed in claim 1, it is characterized in that, when water arrives water level and interior bucket when not floating yet, start the shake current program of set point number, make motor left rotation and right rotation 3-5 time, whether the step of reruning 2-5, float with bucket in determining:
Step 21, do not float yet as interior bucket, then computer program controller sends warning message to the user;
Step 22, float as interior bucket, then washing machine covers water to water level, enters next step washing procedure.
3. as claimed in claim 1 a kind of utilize power of motor change to judge in the method for bucket floating state, it is characterized in that, the setting priming level of described step 1 be lower than the water level of washing machine and buoyancy of water be not enough to float in water level during bucket.
4. a kind of method of utilizing power of motor to change bucket floating state in the judgement as claimed in claim 1 is characterized in that the Fixed Time Interval in the described step 2 is 1000ms-1500ms.
5. a kind of method of utilizing power of motor to change bucket floating state in the judgement as claimed in claim 1 is characterized in that the rotation direction of motor is a clockwise direction in the described step 2.
6. as claimed in claim 1 a kind of utilize power of motor change to judge in the method for bucket floating state, it is characterized in that optimal way is in the described step 52, when the double result who subtracts each other all less than 0 the time, barrel information of floating in just providing.
7. a kind of method of utilizing power of motor to change bucket floating state in the judgement as claimed in claim 6, it is characterized in that, in the described step 52, when difference for the first time occurring less than 0 the time, keep minuend and be fixing minuend, the follow-up power that records only subtracts each other with fixing minuend.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042675.9A CN102115969B (en) | 2011-02-21 | 2011-02-21 | A kind of power of motor that utilizes changes the method judging interior bucket floating state |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110042675.9A CN102115969B (en) | 2011-02-21 | 2011-02-21 | A kind of power of motor that utilizes changes the method judging interior bucket floating state |
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| CN102115969A true CN102115969A (en) | 2011-07-06 |
| CN102115969B CN102115969B (en) | 2016-03-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868778A (en) * | 2016-12-31 | 2017-06-20 | Tcl家用电器（合肥）有限公司 | Control method for washing machine |
| CN108998922A (en) * | 2017-06-06 | 2018-12-14 | 松下家电研究开发（杭州）有限公司 | A kind of motor's for washing machine starting control method |
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| US4837882A (en) * | 1987-12-15 | 1989-06-13 | Whirlpool Corporation | Flotation controlled drive for an automatic washer |
| JPH03143497A (en) * | 1989-10-31 | 1991-06-19 | Sanyo Electric Co Ltd | Controller for washing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868778A (en) * | 2016-12-31 | 2017-06-20 | Tcl家用电器（合肥）有限公司 | Control method for washing machine |
| CN106868778B (en) * | 2016-12-31 | 2020-06-12 | Tcl家用电器（合肥）有限公司 | Washing machine control method |
| CN108998922A (en) * | 2017-06-06 | 2018-12-14 | 松下家电研究开发（杭州）有限公司 | A kind of motor's for washing machine starting control method |
| CN108998922B (en) * | 2017-06-06 | 2020-12-11 | 松下家电研究开发（杭州）有限公司 | Washing machine motor starting control method |
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| CN102115969B (en) | 2016-03-02 |
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Effective date of registration: 20160812 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, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee before: haier group corporation Patentee before: Qingdao Haier Washing Machine Co., Ltd. |