Expansion tank device, process for fabricating expansion tank device, and liquid cooling radiator

Abstract

An expansion tank devicecomprises a tank installation basehaving a cooling liquid channeland an expansion tankprovided on the upper surface of the installation base. The basehas a communication holefor holding space above the upper surface thereof in communication with the cooling liquid channel. The expansion tankhas a tank main bodyincluding an upwardly bulging portionhaving an opening at its lower end, and a bottom platejoined to the lower end of the tank main bodyfor closing the lower-end opening of the bulging portionand joined to the upper surface of the tank installation base. The bottom plateis provided at a portion thereof corresponding to the communication holewith a through holecommunicating with the communication hole. The bottom plateis provided with a baffle plateformed along the entire circumference of the inner peripheral edge thereof defining the through holeand slanting upwardly toward the center of the through hole. The expansion tank deviceremoves the air in the cooling liquid from the circulating system, precludes the system from breaking and prevents the decrease in the amount of cooling liquid within the circulating system.