Heat dissipation device

Details Heat dissipation device Heat dissipation device

2007-10-25

2009-11-03

Gandhi, Jayprakash N (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S679310, C361S679540, C361S697000, C361S700000, C062S003700

Reexamination Certificate

active

07613002

ABSTRACT:
A heat dissipation device for a hard disk drive includes a first heat sink and a control circuit. The first heat sink includes an input interface, a counter unit, a controller unit, and an output unit. The input interface is used for receiving an input signal, which is determined by a temperature of the computer system. The counter unit is used for generating a high level signal on counting to a predetermined value. The controller unit is used for generating a switch signal on receiving the high level signal, and sending a clear signal to the counter unit for clearing the counter unit. The output unit is used for being switched on or off according to the switch signal, and sending a control signal to the first heat sink. The control signal is able to drive the cooling end of the first heat sink to cool down.

REFERENCES:
patent: 5689654 (1997-11-01), Kikinis et al.
patent: 7483269 (2009-01-01), Marvin et al.
patent: 2001/0008071 (2001-07-01), Macias et al.
patent: 2005/0219809 (2005-10-01), Muncaster et al.

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