Patent ID: 6938678

Claim:
An arrangement for cooling an electronic assembly, the arrangement comprising: a circuit board having a first surface, a second surface, and at least a first heat-generating element secured to the first surface, the circuit board further comprising at least one aperture extending between the first surface and the second surface; an enclosure member secured to said circuit board so as to form a fluid tight barrier of a compartment defined at least in part by said enclosure member and said circuit board, said compartment including a first subcompartment defined at least in part by said first surface and said enclosure member and a second subcompartment defined at least in part by said second surface and said enclosure member; a liquid disposed within said compartment; at least one electromechanical actuator secured within the compartment, the electromechanical actuator operable to generate a flow movement of the liquid in the direction of the at least one aperture, the at least one mechanical actuator including a substantially rigid blade coupled to a piezoelectric actuator and extending in a first direction from the piezoelectric actuator, the piezoelectric actuator coupled proximate the at least one aperture; and a flapper valve having a first end secured within the second subcompartment proximate the at least one aperture and a second end movably coupled to the first end, the second end movable to alternately allow fluid flow throught the first aperture and inhibit fluid flow through the first aperture.