Patent ID: 7971632
Filing Date: 2011-07-05
Classification: F28D,F28F,G06F,H05K

Abstract:
1. A cooling system for a computer system processing unit, comprising: an integrated element, a heat radiator, and a fan, wherein the integrated element comprises a heat exchanging interface, a reservoir, and a pump; wherein the reservoir is adapted to receive a cooling liquid from outside the reservoir through an inlet and pass the cooling liquid to outside the reservoir through an outlet, the reservoir comprising an upper chamber and a lower chamber, the upper chamber and the lower chamber being separate chambers that are fluidly coupled together by an inlet passage and an outlet passage, the inlet passage being a passage that directs the cooling liquid from the upper chamber to the lower chamber and the outlet passage being a passage that directs the cooling liquid from the lower chamber to the upper chamber, the lower chamber having a recessed cavity and a plurality of channels adapted to direct flow of the cooling liquid across the heat exchanging interface; the heat radiator is connected between the outlet and the inlet and is adapted to exhaust heat from the cooling liquid, the heat radiator being configured to circulate the cooling liquid therethrough; the heat exchanging interface is adapted to provide thermal contact between the processing unit and the cooling liquid, such that heat is dissipated from the processing unit to the cooling liquid as the cooling liquid passes across the heat exchanging interface, the heat exchanging interface being removably attached to the reservoir such that the heat exchanging interface forms a boundary surface of the plurality of channels and the recessed cavity; the pump being adapted to pump the cooling liquid through the reservoir and the heat radiator, the pump including an AC motor having a rotor, a stator and an impeller having a plurality of blades configured to increase an efficiency of the impeller when rotating in a predetermined rotational direction, the impeller being mechanically integrated with the rotor and positioned within the recessed cavity of the lower chamber such that a bottom face of the impeller faces an inside surface of the heat exchanging interface, an AC voltage to operate the motor being generated from a DC power supply of the computer system, a characteristic of the AC voltage directed to the motor during starting of the motor being based at least on an angular position of the rotor and the predetermined rotational direction; and the fan being configured to direct air through the heat radiator, the fan being driven by a motor separate from the AC motor of the pump.