Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Patent
1996-10-24
1998-04-07
Coe, Philip H.
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
68 1216, 68 1226, 68 1227, 68196, D06F 3302
Patent
active
057350078
ABSTRACT:
There is disclosed a power supply system for a washing machine which has an automatic door opening/closing apparatus designed for automatically opening or closing a door, a washing machine driving unit for enabling the washing machine to perform the washing operation, and a control component for controlling the operation of the washing machine driving unit. The power supply system includes a step-down transformer which has a primary winding directly connected to a power source and secondary windings formed of a first and a second secondary windings so as to decrease an alternating-current (AC) voltage at a predetermined ratio; a first power supply unit connected to the first secondary winding of the step-down transformer, and converting a first decreased AC voltage into a first direct-current (DC) voltage that is supplied to the control unit; a second power supply unit connected to the second secondary winding of the step-down transformer, and converting a second decreased AC voltage into a second DC voltage that is supplied to a door/lamp driver; the door/lamp driver having an input terminal connected to the second power supply unit and output terminals respectively connected to a door motor and a lamp, which allows them to be activated; and a power switch connected between the power cord and the washing machine driving unit.
REFERENCES:
patent: 4510777 (1985-04-01), Ellingson et al.
patent: 4623179 (1986-11-01), Davis et al.
patent: 4866955 (1989-09-01), Blair et al.
patent: 5038587 (1991-08-01), Harmelink
patent: 5070565 (1991-12-01), Sood et al.
patent: 5546773 (1996-08-01), Lee
Coe Philip H.
Samsung Electronics Co,. Ltd.
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