Abstract: A drum-type washing machine, and tub and gasket cleaning methods are provided. The drum-type washing machine may include a tub mounted in a cabinet such that a wash water is supplied into the tub, a drum rotatably mounted in the tub such that laundry may be put into the drum, a motor that rotates the drum, and a controller that controls a driving of the motor such that, when the drum is rotated, the wash water supplied into the tub reaches an upper part of an inner circumferential surface of the tub so as to clean the inner circumferential surface of the tub and the gasket.

Abstract: An apparatus and method for switching a power transmission mode of a washing machine id disclosed, to prevent malfunction and damages of the washing machine by switching the power transmission mode stably in which the method includes: (a) rotating the cam (600) by driving the clutch motor (60); (b) counting the number of pulses of power supplied to the clutch motor (60); and (c) maintaining the rotation of the cam (600) until the ounted number of pulses is equal to, or greater than a preset number of pulses.

Abstract: A drum-type washing machine that is capable of easily cleaning a tub (110) and a tub cleaning method of the same are disclosed. A drum-type washing machine that is capable of cleaning a gasket (140) along with cleaning of the tub and a gasket cleaning method of the same are also disclosed. The drum-type washing machine includes a tub (110) mounted in a cabinet (101) such that wash water is supplied into a tub (110), a drum (106) rotatably mounted in the tub (110) such that laundry is put into the drum (106), a motor (104) for rotating the drum (106), and a control unit (160) for controlling the driving of the motor (104) such that, when the drum (106) is rotated, the wash water supplied into the tub (110) reaches the upper part of the inner circumferential surface of the tub (110) so as to clean the inner circumferential surface of the tub (110).

Abstract: Device and method for detecting malfunction of a clutch in a washing machine, the device including a clutch including a coupling for transmission of a power from a motor to a washing shaft or a spinning shaft, a clutch motor (60) for providing a power to the coupling, a switch for controlling the coupling, and a cam (600) fitted to be rotatable with the clutch motor for turning on/off the switch in response to the rotation, a power supplying part for supplying a voltage to the motor and the clutch motor (60), a pulse counting part for counting a number of pulses of a voltage supplied to the clutch motor from the power supplying part, and a microcomputer for repeating a process in which the clutch motor is stopped for a second set time period (S20) and operated again if the switch is not switched for a first set time period from a time the clutch motor is put into operation, and informs to a user that the clutch is in malfunction if the switch is not switched while the process is repeated equal to or more than

Abstract: Device and method for detecting malfunction of a clutch in a washing machine, the device including a clutch including a coupling for transmission of a power from a motor to a washing shaft or a spinning shaft, a clutch motor (60) for providing a power to the coupling, a switch for controlling the coupling, and a cam (600) fitted to be rotatable with the clutch motor for turning on/off the switch in response to the rotation, a power supplying part for supplying a voltage to the motor and the clutch motor (60), a pulse counting part for counting a number of pulses of a voltage supplied to the clutch motor from the power supplying part, and a microcomputer for repeating a process in which the clutch motor is stopped for a second set time period (S20) and operated again if the switch is not switched for a first set time period from a time the clutch motor is put into operation, and informs to a user that the clutch is in malfunction if the switch is not switched while the process is repeated equal to or more than

Abstract: An apparatus and method for switching a power transmission mode of a washing machine id disclosed, to prevent malfunction and damages of the washing machine by switching the power transmission mode stably in which the method includes: (a) rotating the cam (600) by driving the clutch motor (60); (b) counting the number of pulses of power supplied to the clutch motor (60); and (c) maintaining the rotation of the cam (600) until the ounted number of pulses is equal to, or greater than a preset number of pulses.

Abstract: Device and method for detecting malfunction of a clutch in a washing machine, the device including a clutch including a coupling for transmission of a power from a motor to a washing shaft or a spinning shaft, a clutch motor (60) for providing a power to the coupling, a switch for controlling the coupling, and a cam (600) fitted to be rotatable with the clutch motor for turning on/off the switch in response to the rotation, a power supplying part for supplying a voltage to the motor and the clutch motor (60), a pulse counting part for counting a number of pulses of a voltage supplied to the clutch motor from the power supplying part, and a microcomputer for repeating a process in which the clutch motor is stopped for a second set time period (S20) and operated again if the switch is not switched for a first set time period from a time the clutch motor is put into operation, and informs to a user that the clutch is in malfunction if the switch is not switched while the process is repeated equal to or more than