Patent ID: 9163347
Filing Date: 2015-10-20
Classification: D06F

Abstract:
1. A door lock control device of a washing machine, the door lock control device comprising: a door; a door lock configured to mechanically lock the door; a door lock switch including a door switch turned on and off according to a closing or opening of the door, a main switch to power on or off electrical parts of the washing machine, and a first solenoid in which current flows according to an operation of a door lock relay, to control a switching operation of the main switch; a photo-coupler sensor to optically sense an operation state of the door switch and to output a door closing or opening signal; a control unit to determine a closed or opened state of the door according to the door closing or opening signal and to output a door lock control signal; the door lock relay includes a relay switch to switch between a first terminal and a second terminal to control the switching operation of the main switch based on the output door lock control signal and a second solenoid in which current flows according to the output door lock control signal, to control a switching operation of the relay switch; a main motor driven under the control of the control unit, wherein the control unit stops the driving of the main motor if the control unit determines the door is opened during operation of the washing machine; and a display unit to display an error message when the driving of the main motor is stopped when the control unit determines that the door is opened during the operation of the washing machine, wherein the relay switch comprises a common terminal coupled to the first solenoid and is configured to electrically connect the common terminal with the first terminal coupled to a power source such that the first solenoid operates the main switch to be turned on when the door is closed.