Patent ID: 7978470

Claim:
An electronic apparatus having a microprocessor in a main body portion that generates heat and discharging the heat generated in said main body portion to the outside with a cooling liquid, comprising: a plurality of heat dissipation portions that have flow paths of the cooling liquid in a mode of communicating with each other in series, the flow paths including an outer flow path and an inner flow path; a bypass flow path that branches from a communicating portion between the outer flow path and the inner flow path and that connects to a body flow path in the main body portion; a pump that drives the cooling liquid to pass through the body flow path and to circulate in at least one of the outer flow path, the inner flow path and the bypass flow path in series; a valve for adjusting a ratio of a flow rate of the cooling liquid flowing through the inner flow path over a flow rate of the cooling liquid flowing through the bypass flow path; a measuring unit that measures a temperature about the microprocessor; and a control unit that controls an output of the pump and an opening of the valve based on the temperature about the microprocessor by the measuring unit, thereby controlling a flow rate of the cooling liquid flowing through said flow paths in each of said plurality of heat dissipation portions.