Patent ID: 7506682

Claim:
A fluid heat exchanger assembly for cooling an electronic device with a liquid coolant supplied from a heat extractor (R, F) and comprising; a housing having an inlet and an outlet and an upper portion and a lower portion with said inlet and said outlet being in said upper portion, a partition dividing said housing into said upper portion having an upper wall and said lower portion for establishing a direction of flow in a coolant passage from said inlet to said outlet in said upper portion between said partition and said upper wall, a refrigerant disposed in said lower portion of said housing for liquid-to-vapor transformation, said housing being hermetically sealed about said partition to separate said refrigerant in said lower portion from the liquid coolant in said upper portion, flow interrupters disposed in said coolant passage for interrupting thermal boundary layer to enhance thermal heat transfer to the flow of liquid coolant through said coolant passage of said upper portion in response to heat transferred by an electronic device to said lower portion of said housing, and a projection into said coolant passage defining said flow interrupters; wherein said partition is undulated transversely to said direction of flow from said inlet to said outlet, and wherein said undulated partition comprise V-shaped crests and said flow interrupters extend from V-shaped crests.