| 摘要 |
The heat removal ability of a spiral finned counterflow two pass active heat sink ("Wagner" active heat sink) is increased by eliminating a slight recirculation of heated discharge air back into the cool intake air by conducting intake air to the Wagner active heat sink with a ductworks having an orifice proximate the intake end of the heat sink. The diameter of the orifice is larger than that of the Wagner active heat sink, and if the heat sink does not extend into the orifice, then a pusher fan may be located somewhere near the entrance of the duct to fill it with pressurized air that then exits from the orifice to form a curtain of cool air around the outside of the Wagner active heat sink. This curtain of cool air replaces the certain amount of heated discharge air that otherwise recirculates back into the input of the heat sink. If the ductwork can be extended toward the Wagner active heat sink, or the heat sink moved toward the orifice, such that heat sink penetrates the orifice and is partly inside the ductwork by an amount related to the geometry of the fan within the Wagner active heat sink, then the pusher fan can be eliminated in favor of the suction provided by the Wagner active heat sink itself.
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