US Patent 7261144 Bubble generator

A heat transfer assembly for transferring heat from a heat generating device to a circulating fluid, said heat transfer assembly comprisingan evaporator device having at least one microchannel formed therein, in thermally conductive contact with said heat generating device,a condenser device,actuating means and manifold means for circulating said fluid between said evaporator device and said condenser device,wherein said heat transfer assembly further comprises a bubble generator capable to create bubbles in said at least one microchannel at a controlled frequency.