Patent WO-2011068322-A2 (WO)
Title: Fire-preventing and power-saving intelligent multi-outlet
Inventor: KIM GWI RO
IPC: H01R13/70
Filed: 2010-11-24
Abstract: The present invention relates to a fire-preventing and power-saving intelligent multi-outlet, and more particularly, to a fire-preventing and power-saving intelligent multi-outlet which cuts off power from being supplied to electric devices upon the occurrence of a high temperature, an overcurrent, leakage, or overvoltage on the inside or outside of the multi-outlet, which prevents electrical accidents and fire which can be caused by said electrical accidents, which cuts off stand-by current and thus saves power loss, which displays the value of the current flowing through the multi-outlet and the internal and external temperatures of the multi-outlet to thus easily check the condition of the multi-outlet, and which minimizes power consumption of power-converting means for controlling the multi-outlet. For this purpose, the multi-outlet of the present invention comprises: a power plug (90) arranged so as to be connectable to the outlet connected to a commercial power source, to receive alternating current electricity; a plug socket (91) arranged so as to be connectable to the power plug (90) to supply alternating current electricity to the power plug (90); a power unit (50) which converts the alternating current electricity applied through the power plug (90) into direct current electricity of a preset voltage; a switch unit (30) including a stand-by current set switch (31) for selecting a stand-by current set mode and a regular mode switch (32) for switching a cut-off mode into a regular mode; an output unit (40) including a display part (41), a lamp (42), and a buzzer (43); a power switching unit (80) which is arranged in each of the plug sockets (91), and which has an input terminal connected to the power plug (90) and an output terminal connected to the plug socket (91) to selectively supply the alternating current electricity applied from the power plug (90) to the plug socket (91); an overvoltage protection unit (60) configured to absorb the alternating current electricity being applied thereto when the voltage of the alternating current electricity being applied from the power plug (90) exceeds a predetermined voltage level; a first thermal sensing unit (71) installed at the input terminal of each of the power switching units (80) to sense the temperature of the cable connected to the input terminal of the power switching unit (80); a second thermal sensing unit (74) which senses the temperature of the outside of the multi-outlet; a current-sensing unit (72) which is installed at the input terminal of each of the power switching units (80) to sense the current of the alternating current electricity being applied through the power plug (90), and which is set with a rated current of the multi-outlet; a second current-sensing unit (73) installed at the output terminal of each of the power switching units (80) to sense the stand-by current flowing through the plug socket (91); and a control unit (10) which controls the operation of the power switching unit (80) in accordance with signals output by the first and second thermal sensing units (71, 74) and by the first and second current-sensing units (72, 73).