Method for controlling washing during spinning in tilt-type washing machine for attenuation of vibration

Abstract

Method for controlling washing during spinning in a tilt-type washing machine for attenuation of vibration, including (a) a main rotation step for exerting a centrifugal force to the laundry gathered to a center of the inner tub for spreading the laundry to an inside wall of the inner tub before the water discharging step, (b) a laundry disentangle alternately rotating step for alternately rotating the inner tub for a preset times to disentangle the laundry spread to the inside wall of the inner tub, and (c) a supplementary rotating step for rotating the inner tub at a preset RPM to keep the laundry in the tilted inner tub spread evenly during the water discharge step, or alternatively (a) a laundry disentangle alternately rotating step for alternately rotating the inner tub to eliminate the eccentricity of the laundry in the inner tub before the water discharge step, and (b) a determining step either for carrying out a control pattern to eliminate the eccentricity of the laundry if the eccentricity of the laundry after the step (a) is greater than a preset value, or for proceeding to the water discharging step if the eccentricity of the laundry after the step (a) is smaller than the preset value, whereby attenuating the vibration to the minimum.

1. A method for controlling washing during spinning in a tilt-type washing machine for attenuation of vibration, the method including a washing cycle having a water supplying step-an alternately rotating(washing) step-a water discharging step-a spinning step, a rinsing cycle having a preset times of repetition of a series of steps with a water supplying step-an alternately rotating(rinsing) step-a water discharging step-a spinning step, and a spinning cycle having a spinning step for carrying out a main water extraction, which are proceeded in a sequence, the method comprising:
 (a) a main rotation step for exerting a centrifugal force to the laundry gathered to a center of the inner tub for spreading the laundry to an inside wall of the inner tub before the water discharging step;  
 (b) a laundry disentangle alternately rotating step for alternately rotating the inner tub for a preset times to disentangle the laundry spread to the inside wall of the inner tub; and,  
 (c) a supplementary rotating step for rotating the inner tub at a preset RPM to keep the laundry in the tilted inner tub spread evenly during the water discharge step.  
 
     
     
       2. A method as claimed in  claim 1 , wherein the inner tub rotates alternately less than 10 times in the step (b). 
     
     
       3. A method as claimed in  claim 1 , wherein the supplementary rotating step includes the step of rotating the inner tub at ω=√{square root over ((2 g sin θ/R)} when a gravitational acceleration ‘g sin θ’ exerting to the laundry in the inner tub and an average radial acceleration ‘(½)Rω 2 ’, exerting to the laundry at a half way to the radius of the inner tub are equal, so that the laundry within a (½) area of the inner tub tends to move in a direction of the gravitational acceleration, and the laundry between (½)R and R area of the inner tub tends to move in a direction of the radial acceleration by a radial acceleration greater than the gravitational acceleration(or the average radial acceleration) and smaller than the maximum radial acceleration ‘Rω 2 , for spreading the laundry evenly, where ‘R’ denotes a radius of the inner tub and ‘θ’ denotes a tilt angle of the inner tub with respect to the ground. 
     
     
       4. A method as claimed in  claim 3 , wherein the present PRM is 30-50 RPM, when the radius ‘R’ of the inner tub is 0.25-0.3 m, and the tilt angle with respect to the ground is 10-15°. 
     
     
       5. A method as claimed in  claim 1 , wherein the preset RPM is 30-50 RPM, when the radius ‘R’ of the inner tub is 0.25-0.3 m, and the tilt angle with respect to the ground is 10-15°. 
     
     
       6. A method for controlling washing during spinning in a tilt-type washing machine for attenuation of vibration, the method including a washing cycle having a water supplying step-an alternately rotating(washing) step-a water discharging step-a spinning step, a rinsing cycle having a preset times of repetition of a series of steps with a water supplying step-an alternately rotating(rinsing) step-a water discharging step-a spinning step, and a spinning cycle having a spinning step for carrying out a main water extraction, which are proceeded in a sequence, the method comprising:
 (a) a laundry disentangle alternately rotating step for alternately rotating the inner tub to eliminate the eccentricity of the laundry in the inner tub before the water discharge step; and,  
 (b) a determining step either for carrying out a control pattern to eliminate the eccentricity of the laundry if the eccentricity of the laundry after the step (a) is greater than a preset value, or for proceeding to the water discharging step if the eccentricity of the laundry after the step (a) is smaller than the preset value.  
 
     
     
       7. A method as claimed in  claim 6 , wherein the control pattern includes the steps of:
 carrying out the laundry disentangle alternately rotating step again for dropping the eccentricity of the laundry below the preset value,  
 carrying out the determining step again, and  
 automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.  
 
     
     
       8. A method as claimed in  claim 6 , wherein the control pattern includes the steps of:
 determining an extent of the eccentricity and an eccentric position of the laundry,  
 carrying out an optimal laundry disentangle alternately rotating step centered on the eccentric position of the laundry for dropping the eccentricity of the laundry below the preset value,  
 carrying out the determining step again, and  
 automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.  
 
     
     
       9. A method as claimed in  claim 8 , wherein the eccentric position of the laundry is determined to be as a region at which the angular speed of the inner tub is reduced by weight of the eccentric laundry itself when the eccentric laundry is moved upward, and increased by weight of the eccentric laundry itself when the eccentric laundry is moved downward. 
     
     
       10. A method as claimed in  claim 6 , wherein the extent of eccentricity is defined to be a size of oscillating component deviated from a fixed speed when the inner tub is rotated at the fixed speed. 
     
     
       11. A method as claimed in  claim 6 , further comprising the supplementary determining step before the spinning step, for carrying out the supplementary control pattern to eliminate the eccentricity of the laundry if the eccentricity is greater than the preset value after the water discharge step, or proceeding to the spinning step if the eccentricity is greater than the preset value after the water discharge step. 
     
     
       12. A method as claimed in  claim 11 , wherein the supplementary control pattern includes the steps of;
 supplying water to the inner tub,  
 carrying out the laundry disentangle alternately rotating step again for eliminating the eccentricity of the laundry,  
 carrying out the determining step, again,  
 carrying out the water discharging step, again,  
 carrying out the supplementary determining step again, and  
 automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.  
 
     
     
       13. A method as claimed in  claim 6 , further comprising a step for rotating the inner tub at 30-50 RPM to keep the laundry in the tilted inner tub spread evenly during the water discharge step. 
     
     
       14. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising, in the following order:      a )  a laundry disentangle alternately rotating step to alternately rotate the inner tub to eliminate eccentricity of laundry in the inner tub without water discharge and before a main water extraction and after a washing step or rinsing step; and        b )  a determining step to proceed to the main water extraction step if the eccentricity of the laundry after the step  ( a )  is smaller than a preset value.     
     
     
       15. The method as claimed in  claim 14 , wherein the inner tub rotates alternately less than  10  times in the step ( a ). 
     
     
       16. The method as claimed in  claim 14 , further comprising;
   carrying out the laundry disentangle alternately rotating step again to lower the eccentricity of the laundry below the preset value if the eccentricity of the laundry after the step (   a )  is greater than the preset value;        carrying out the determining step again; and automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.     
     
     
       17. The method as claimed in  claim 14 , further comprising rotating the inner tub at  30 -   50  RPM to keep the laundry in the tilted inner tub spread evenly.   
     
     
       18. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising, in the following order:      a )  alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of laundry in the inner tub without water discharge and before a main water extraction and after a washing step or rinsing step; and        b )  determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value.     
     
     
       19. The method for controlling attenuation of vibration in a tilt- type washing machine as set forth in    claim 18   , and further alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of the laundry in the inner tub before a main water extraction if the eccentricity of the laundry after the alternately rotating is greater than the preset value.   
     
     
       20. The method for controlling attenuation of vibration in a tilt- type washing machine as set forth in    claim 19   , and further determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value.   
     
     
       21. The method as claimed in  claim 18 , wherein the inner tub rotates alternately less than  10  times in the step ( a ). 
     
     
       22. The method as claimed in  claim 18 , further comprising;
   carrying out the laundry disentangle alternately rotating step again to drop the eccentricity of the laundry below the preset value if the eccentricity of the laundry after the step  ( a ) is greater than the preset value;      carrying out the determining step again; and        automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.     
     
     
       23. The method as claimed in  claim 18 , further comprising rotating the inner tub at  30 -   50  RPM to keep the laundry in the tilted inner tub spread evenly.   
     
     
       24. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising, in the following order:      a )  alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of laundry in the inner tub without water discharge and before a main water extraction, and after a washing step or rinsing step and prior to a sensing of the eccentricity; and        b )  determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value.     
     
     
       25. The method for controlling attenuation of vibration in a tilt- type washing machine as set forth in    claim 24    and further alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of the laundry in the inner tub before a main water extraction if the eccentricity of the laundry after the alternately rotating is greater than the preset value.   
     
     
       26. The method for controlling attenuation of vibration in a tilt- type washing machine as set forth in    claim 25   , and further determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value.   
     
     
       27. The method as claimed in  claim 24 , wherein the inner tub rotates alternately less than  10  times in the step ( a ). 
     
     
       28. The method as claimed in  claim 24 , further comprising;
   carrying out the laundry disentangle alternately rotating step again to drop the eccentricity of the laundry below the preset value if the eccentricity of the laundry after the step  ( a ) is greater than the preset value;      carrying out the determining step again; and        automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset times.     
     
     
       29. The method as claimed in  claim 24 , further comprising rotating the inner tub at  30 -   50  RPM to keep the laundry in the tilted inner tub spread evenly.   
     
     
       30. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising:      a )  a main rotation step to exert a centrifugal force to laundry gathered to a center of the inner tub to spread the laundry to an inside wall of the inner tub before a main water extraction;        b )  a laundry disentangle alternately rotating step to alternately rotate the inner tub for a preset number of times without water discharge to disentangle the laundry spread to the inside wall of the inner tub; and        c )  a supplementary rotating step for rotating the inner tub at a preset RPM to keep the laundry in the tilted inner tub spread evenly, while concurrently discharging water.     
     
     
       31. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising, in the following order:      a )  alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of laundry in the inner tub without water discharge before a main water extraction, and after a washing step or rinsing step;        b )  determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value; and        c )  supplying water if the eccentricity of the laundry is less than the preset value.     
     
     
       32. The method as claimed in  claim 31 , further comprising a water discharge step before the step ( c ). 
     
     
       33. A method for controlling attenuation of vibration in a tilt- type washing machine having an inner tub, the method comprising, in the following order:      a )  alternately rotating the inner tub to disentangle laundry and eliminate eccentricity of laundry in the inner tub without water discharge before a main water extraction, and after a washing step or rinsing step;        b )  determining if the eccentricity of the laundry after the alternately rotating is smaller than a preset value;        c )  carrying out the step  ( a )  again if the eccentricity of the laundry is greater than the preset value;        d )  carrying out the step  ( b )  again; and        e )  automatically stopping the washing if the eccentricity of the laundry is kept greater than the preset value until the foregoing steps are repeated for a preset number of times.