Patent ID: 8427827

Claim:
An apparatus, comprising: an internal space for accommodating an electronic circuit to be cooled; a first inlet opening for permitting a fluid to enter a cooling apparatus; a first exhaust opening for permitting the fluid to exit the cooling apparatus; and an impeller unit to increase a pressure of the fluid; wherein the impeller unit comprises: a second inlet opening for permitting the fluid to enter the impeller unit; a second exhaust opening for permitting the fluid to exit the impeller unit; an impeller that rotates about an axis; a housing that encloses the impeller; and a projection extending from a terminal end of the housing, the projection having one of a semicircular cross section and an elliptical cross section such that the terminal end of the housing protrudes into the second inlet opening, the projection impeding the fluid as it enters the impeller unit through the second inlet opening such that a turbulence of the fluid is reduced as the fluid flows towards the second exhaust opening.