Laundry processing apparatus and control method thereof

Abstract

Provided is a laundry processing apparatus including an inner tank in which a laundry is seated, a motor that transmits a rotational force to the inner tank, and a processor for controlling the motor to perform a washing cycle, a rinsing cycle, and a dewatering cycle. The processor receives an input of changes, during a last first set time, of a plurality of signal values indicating operation states of the inner tank and the motor in a set RPM section while accelerating RPM of the motor for performing the dewatering cycle and performs bubble detection and eccentricity detection based on the inputted changes of the plurality of signal values. The processor may perform the bubble detection and the eccentricity detection every second set time in the set RPM section.

What is claimed is: 
     
         1 . A laundry processing apparatus comprising:
 an inner tank in which a laundry is seated;   a motor that transmits a rotational force to the inner tank; and   a processor for controlling the motor to perform a washing cycle, a rinsing cycle, and a dewatering cycle, wherein   the processor receives an input of a change, during the last first set time, of a plurality of signal values indicating operation states of the inner tank and the motor in a set RPM section while accelerating RPM of the motor for performing the dewatering cycle and performs bubble detection and eccentricity detection based on the inputted changes of the plurality of signal values.   
     
     
         2 . The laundry processing apparatus according to  claim 1 , wherein the processor performs the bubble detection and the eccentricity detection every second set time in the set RPM section. 
     
     
         3 . The laundry processing apparatus according to  claim 2 , wherein
 the processor performs the dewatering cycle according to   a first acceleration of maintaining first RPM for a predetermined time after accelerating the motor up to the first RPM,   a second acceleration of maintaining second RPM for a predetermined time after accelerating the motor up to the second RPM higher than the first RPM,   a third acceleration of maintaining third RPM for a predetermined time after accelerating the motor up to the third RPM higher than the second RPM, and   a fourth acceleration of maintaining fourth RPM for a predetermined time after accelerating the motor up to the fourth RPM higher than the third RPM.   
     
     
         4 . The laundry processing apparatus according to  claim 3 , wherein the set RPM section is a section greater than the second RPM and smaller than the third RPM. 
     
     
         5 . The laundry processing apparatus according to  claim 4 , wherein the first RPM is 60 RPM, the second RPM is 108 RPM, the third RPM is 350 RPM, and the fourth RPM is 1160 RPM. 
     
     
         6 . The laundry processing apparatus according to  claim 2 , wherein the set RPM section is greater than 108 RPM and smaller than 350 RPM. 
     
     
         7 . The laundry processing apparatus according to  claim 1 , wherein
 the plurality of signal values include current RPM (cRPM), request RPM (rRPM), a q-axis current (Iq), an unbalance (UB), a 3-axis Gyro-Diff, and a 3-axis Acc.-Diff, and   RPM of the set RPM section and the first RPM to the fourth RPM are respectively the request RPM.   
     
     
         8 . The laundry processing apparatus according to  claim 7 , wherein the processor learns a change pattern of the plurality of signal values through a neural network to perform bubble detection and eccentricity detection. 
     
     
         9 . The laundry processing apparatus according to  claim 8 , wherein the first set time is 2.4 sec and the second set time is 60 ms. 
     
     
         10 . A control method of a laundry processing apparatus for controlling the laundry processing apparatus, the method comprising:
 starting a dewatering cycle;   determining whether RPM of a motor is in a set RPM section;   receiving an input of a change, during the last first set time, of a plurality of signal values indicating operation states of an inner tank and the motor of the laundry processing apparatus, when it is determined that the RPM of the motor is in the set RPM section in the determining; and   performing bubble detection and eccentricity detection based on the changes of the plurality of signal values inputted in the receiving of the input of the change.   
     
     
         11 . The control method of a laundry processing apparatus according to  claim 10 , wherein the receiving of the input of the change and the performing of the bubble detection and eccentricity detection are performed every second set time. 
     
     
         12 . The control method of a laundry processing apparatus according to  claim 11 , wherein
 the dewatering cycle is performed according to   a first acceleration of maintaining first RPM for a predetermined time after accelerating the motor up to the first RPM,   a second acceleration of maintaining second RPM for a predetermined time after accelerating the motor up to the second RPM higher than the first RPM,   a third acceleration of maintaining third RPM for a predetermined time after accelerating the motor up to the third RPM higher than the second RPM, and   a fourth acceleration of maintaining fourth RPM for a predetermined time after accelerating the motor up to the fourth RPM higher than the third RPM.   
     
     
         13 . The control method of a laundry processing apparatus according to  claim 12 , wherein the set RPM section is a section greater than the second RPM and smaller than the third RPM. 
     
     
         14 . The control method of a laundry processing apparatus according to  claim 13 , wherein the first RPM is 60 RPM, the second RPM is 108 RPM, the third RPM is 350 RPM, and the fourth RPM is 1160 RPM. 
     
     
         15 . The control method of a laundry processing apparatus according to  claim 13 , wherein when the RPM of the motor exceeds the set RPM section, a final dewatering cycle is performed by proceeding to the fourth acceleration. 
     
     
         16 . The control method of a laundry processing apparatus according to  claim 10 , wherein
 the plurality of signal values include current RPM (cRPM), request RPM (rRPM), a q-axis current (Iq), an unbalance (UB), a 3-axis Gyro-Diff, and a 3-axis Acc.-Diff, and   RPM of the set RPM section and the first RPM to the fourth RPM are respectively the request RPM.   
     
     
         17 . The control method of a laundry processing apparatus according to  claim 16 , wherein bubble detection and eccentricity detection are performed by learning a change pattern of the plurality of signal values through a neural network. 
     
     
         18 . The control method of a laundry processing apparatus according to  claim 17 , wherein the first set time is 2.4 sec and the second set time is 60 ms. 
     
     
         19 . The control method of a laundry processing apparatus according to  claim 18 , further comprising:
 performing fabric dispersion before the starting of the dewatering cycle; wherein   when an eccentricity is detected in the performing of the bubble detection and eccentricity detection, the process proceeds to the performing of the fabric dispersion after stopping an operation of the motor, and   when the bubble is detected in the performing of the bubble detection and eccentricity detection, the process proceeds to the performing of the fabric dispersion after removing the bubble.