A method for controlling the dehydrating operation of a drum type washing machine includes a pre-acceleration step for accelerating a drum to a predetermined control starting speed, and a main accelerating step for accelerating the drum from the control starting speed to a target speed along a linea
A method for controlling the dehydrating operation of a drum type washing machine includes a pre-acceleration step for accelerating a drum to a predetermined control starting speed, and a main accelerating step for accelerating the drum from the control starting speed to a target speed along a linear locus having a preset acceleration slope. A deviation of the center of gravity of the laundry and a pre-spinning time period are reduced in the aforementioned control method.
대표청구항▼
What is claimed is: 1. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; and substantially immediately upon reaching the first predeterm
What is claimed is: 1. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; and substantially immediately upon reaching the first predetermined speed, accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; and running the motor at a fixed speed for the second predetermined time period when the motor reaches the second predetermined speed during a constant speed running period, wherein said constant speed running period determines whether to start the main spinning step of said washing machine. 2. The method according to claim 1, further comprising estimating an unbalance of a load of laundry while the drum is accelerating during the main acceleration period. 3. The method according to claim 1, further comprising estimating an unbalance of a load of laundry while the drum is rotating at a constant speed. 4. The method according to claim 1, wherein the first predetermined speed is within a range of 35-45 rpm. 5. The method according to claim 1, wherein the second predetermined speed is within a range of 90-130 rpm. 6. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; substantially immediately upon reaching the first predetermined speed, accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; operating the drum at the second predetermined speed for a predetermined time period; and determining whether to accelerate or decelerate the drum after operating the drum at the second predetermined speed for the predetermined time period. 7. The method according to claim 6, further comprising estimating an unbalance of laundry in the drum while the drum is accelerating during the main acceleration period. 8. The method according to claim 7, wherein the step of determining comprises accelerating the drum when the unbalance of laundry is less than a preset value. 9. The method according to claim 7, wherein the step of determining comprises decelerating the drum when the unbalance of laundry is greater than a preset value. 10. The method according to claim 7, wherein the step of estimating comprises monitoring a difference between an actual drum speed and a desired drum speed along the linear locus during the main acceleration period. 11. The method according to claim 6, further comprising estimating an unbalance of laundry in the drum while the drum speed maintains the second predetermined speed for the predetermined time period. 12. The method according to claim 11, wherein the step of determining comprises accelerating the drum when the unbalance of laundry is less than a preset value. 13. The method according to claim 11, wherein the step of determining comprises decelerating the drum when the unbalance of laundry is greater than a preset value. 14. The method according to claim 11, wherein the step of estimating comprises measuring a variation of the drum speed while the drum speed maintains the second predetermined speed. 15. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; substantially immediately upon reaching the first predetermined speed, accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; and determining whether to operate the drum at the second predetermined speed for a predetermined time period or to decelerate the drum. 16. The method according to claim 15, further comprising estimating an unbalance of laundry in the drum while the drum is accelerating during the main acceleration period. 17. The method according to claim 16, wherein the step of determining comprises operating the drum at the second predetermined speed for the predetermined time period when the unbalance of laundry is less than a preset value. 18. The method according to claim 16, wherein the step of determining comprises decelerating the drum when the unbalance of laundry is greater than a preset value. 19. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; substantially immediately upon reaching the first predetermined speed, accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; and determining whether to start a main spinning step of said washing machine for dehydrating laundry or to decelerate the drum. 20. A method according to claim 19, further comprising estimating an unbalance of laundry in the drum while the drum is accelerating during the main acceleration period. 21. The method according to claim 20, wherein the step of determining comprises accelerating the drum and start the main spinning step when the unbalance of laundry is less than a preset value. 22. The method according to claim 20, wherein the step of determining comprises decelerating the drum when the unbalance of laundry is greater than a preset value. 23. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; substantially immediately upon reaching the first predetermined speed, accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; operating the drum at the second predetermined speed for a predetermined time period in order to estimate an unbalance of the drum; and determining whether to accelerate the drum for dehydrating laundry or to decelerate the drum according to the unbalance of the drum. 24. The method according to claim 23, wherein the step of determining comprises accelerating the drum for dehydrating laundry in the drum when the unbalance of the drum is less than a preset value. 25. The method according to claim 23, wherein the step of determining comprises decelerating the drum when the unbalance of the drum is greater than a preset value. 26. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; estimating an unbalance of the drum while the drum is accelerating during the main acceleration period; operating the drum at the second predetermined speed for a predetermined time period; and determining whether to accelerate the drum for dehydrating laundry or to decelerate the drum according to the estimated unbalance. 27. The method according to claim 26, wherein the step of determining comprises accelerating the drum for dehydrating laundry when the unbalance of the drum is within a preset value. 28. The method according to claim 26, wherein the step of determining comprises decelerating the drum when the unbalance of the drum is greater than a preset value. 29. A method for controlling a dehydrating operation of a drum type washing machine, said method comprising: accelerating a drum of the washing machine to a first predetermined speed during a pre-acceleration period; accelerating the drum along a linear locus for a predetermined time period between the first predetermined speed and a second predetermined speed during a main acceleration period; estimating a difference between the speed based on the locus and an actual speed during the main acceleration period; maintaining a drum speed at the second predetermined speed during a constant speed running period; and increasing the drum speed when the estimated difference is less than a preset value, and decreasing the drum speed when the difference is greater than the preset value.
Didier Laurent (La Roche sur Yon FRX) Geay Jean C. (St. Florent des Bois FRX), Method for determining a moment of inertia of clothes in a washing and/or drying machine.
Elgersma, Michael R.; Gayme, Dennice F.; Jenne, Theresa C.; Stalsberg, Kevin J., Simultaneous injection method and system for a self-balancing rotatable apparatus.
Nystuen Arne M. (Lincoln Township ; Berrien County MI) Mundy David W. (St. Joseph Township ; Berrien County MI) Kuss John M. (St. Joseph Township ; Berrien County MI), Water extraction method and control for automatic washer.
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