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Cooling Mechanism for Note book PC Disclosure Number: IPCOM000014838D
Original Publication Date: 2001-Feb-01
Included in the Prior Art Database: 2003-Jun-20

Publishing Venue



This article describes a system cooling method for a notebook PC that has some noisy cooling fans. Recently a notebook PC is required to have a high performance CPU. The higher performance of a CPU becomes, the more heat radiation occurs. And to cool down the CPU, fan makes noisy sound. Nevertheless a notebook PC is potentially required to be quiet in usage. Usually a notebook PC has an intelligent fan control, but that is not enough for reducing fan noise to realize proper level. New cooling approach enables to use a note book PC without FAN noise when a CPU usage level is not so high. A CPU heat radiation changes in accordance with the usage level of a CPU. In this system, fan is worked only when a CPU is used in high level. Attached figure shows an example of a new cooling method. A notebook PC (1) has an air duct (2) on its own back of LCD panel. And this duct is connected to a CPU air duct(3). This mechanism accelerates heat exhaustion. This effect is called "chimney effect". Using this mechanism, it is possible to shorten the working time of a CPU fan. And consequently, this makes a notebook PC less noisy. 1