Power supplying system with a delayed closing device for delayed closing of a heat-dissipating fan
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United States of America Patent
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-
Dec 19, 2000
Grant Date -
N/A
app pub date -
Feb 4, 1999
filing date -
Dec 19, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A power supplying system includes a switching control circuit connected to a stand-by power source so as to receive electrical power therefrom. The switching control circuit is further connected to a power-supplying unit and is activated to control operation of the power-supplying unit in a selected one of an ON state, where the power-supplying unit supplies electrical power for operating a heat-dissipating fan, and an OFF state, where the power-supplying unit ceases to supply the electrical power to the heat-dissipating fan. A delayed closing device receives a power-OFF signal from the power-supplying unit at an instant the power-supplying unit is operated from the ON state to the OFF state, and connects the heat-dissipating fan to the stand-by power source upon receiving the power-OFF signal to enable the heat-dissipating fan to receive electrical power from the stand-by power source and permit continued operation of the heat-dissipating fan even after the heat-dissipating fan ceases to receive the electrical power from the power-supplying unit.
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