An eccentric sensing method for a drum washing machine
A drum washing machine, eccentric technology, applied to other washing machines, washing devices, textiles and papermaking, etc., can solve the problems of washing tub damage, irregular changes in speed, noise, etc., to achieve accurate speed determination, overall performance improvement, and accurate improvement sexual effect
Active Publication Date: 2015-09-16
SUZHOU SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology
[0007] The eccentricity test method of the above-mentioned drum washing machine is completed by accelerating the motor in an open-loop manner. During the acceleration process, it often happens that the target speed cannot be reached, or the speed changes irregularly, which easily leads to washing The bubbles cannot spread out evenly, so that the eccentricity detection cannot be performed accurately
[0008] In addition, when the dehydration operation is performed without accurately detecting the eccentricity, noise will be generated as the washing tub vibrates, and the front-loading washing machine may move from its original position. Difficult to damage due to inability to withstand such shocks
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[0033] As mentioned in the background technology, the drum washing machine needs to sense eccentricity before dehydration. The eccentricity sensing discrimination level of the drum washing machine in the prior art is ±200G. If it is in the case of high eccentricity, the discrimination ability is poor. see figure 1 as shown, figure 1 It is an eccentricity test method of a drum washing machine in the prior art. The eccentricity test method is completed by accelerating the motor in an open-loop manner. During the acceleration process, it often occurs that the target speed cannot be reached, or the rotational speed The phenomenon of irregular changes will easily lead to the inability to spread the washing bubbles evenly, and then the eccentricity detection cannot be performed accurately. In addition, when the dehydration operation is performed without accurately detecting the eccentricity, noise will be generated as the washing tub vibrates, and the front-loading washing machine ...
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The invention discloses an eccentricity sensing method of a roller washing machine. The eccentricity sensing method includes the steps: driving a motor to be at a target rotating speed, and calculating couter electromotive force, caused by eccentricity, of the motor from the starting of driving; when a physical parameter corresponding to electromotive force is smaller than a preset limit, maintaining the target rotating speed, collecting duty ratios of control signals for maintaining the rotating speed, and mathematically calculating a mean value of the duty ratios; utilizing the duty ratio to control the washing machine to operate, and a difference of maximum and minimum motor pulse periods in N roller rotating periods; and utilizing a formula in software to calculate size of eccentricity by substituting the difference of the periods. By the eccentricity sensing method of the roller washing machine, unbalanced eccentricity of the roller washing machine can be accurately judged, and good dewatering vibration performance can be guaranteed.
Description
technical field [0001] The invention relates to the field of home appliances, in particular to an eccentricity sensing method for a washing machine. Background technique [0002] The washing machine is a device that uses the action of washing water and detergent to remove the dirt stuck in the laundry through steps such as washing, cleaning, dehydration, and drying. When the washing machine is washing, the inner wall of the stainless steel barrel rubs the clothes continuously, and then realizes the washing of the clothes; when dehydrating, driven by the motor, the entire inner drum of the washing machine rotates, and the moisture contained in the clothes is separated under the action of centrifugal force The clothes are discharged out of the inner drum of the washing machine through the dehydration hole on the inner drum of the washing machine, and then the water is discharged out of the washing machine through the drainage structure of the outer tub of the washing machine, ...
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IPC IPC(8): D06F37/42
Inventor 熊明
Owner SUZHOU SAMSUNG ELECTRONICS CO LTD