| 摘要 |
PURPOSE: A washing water purifying system for a washing machine and a driving circuit for controlling the same are provided to supply clean water to a washing tub by removing heavy metals and other impurities contained in washing water, and safely control an electric condensing element and a magnetic separating element by an insulated driving circuit separated from a circuit for driving general loads of the washing machine. CONSTITUTION: A driving circuit for controlling a washing water purifying system for a washing machine includes a second transformer(43) for converting an AC voltage supplied to an electric condensing element and a magnetic separating element from a power supply to a DC voltage, a first relay(44) connected to the second transformer for turning on or off the power to be supplied to the electric condensing element, a second relay(45) connected to the second transformer for turning on or off the power to be supplied to the magnetic separating element, a first photo-coupler(46) for outputting a first control signal to control the first relay by turning on or off an excite coil of the first relay according to a control signal of a microcomputer(40), and a second photo-coupler(47) for outputting a second control signal to control the second relay by turning on or off an excite coil of the second relay according to a control signal of a microcomputer. |
