Patent ID: 7729115
Filing Date: 2010-06-01
Classification: H05K

Abstract:
1. An electrical apparatus having a cooling system, the apparatus comprising: a first cover to cover a first part of the electrical apparatus to be cooled; a second cover substantially enclosing the first cover to define a surrounding space there-between, the surrounding space having an inlet and an outlet; a base plate on which the first cover is mounted to define an environmentally-sealed enclosure that houses the first part of the electrical apparatus to be cooled, the base plate having one or more apertures communicating with the surrounding space; a first circulation device to cause air to circulate in the environmentally-sealed enclosure; a second circulation device to cause a cooling fluid to circulate around the surrounding space between the first and second cover adjacent the environmentally-sealed enclosure, wherein the second circulation device is arranged outside of the surrounding space; a heat transfer structure positioned on each side of the first cover, such that heat is transferred from the environmentally-sealed enclosure to the cooling fluid in the surrounding space and out of the outlet; a third cover mounted to an opposite side of the base plate from the first cover to define a second enclosure that houses a second part of the electrical apparatus to be cooled; and a heat exchange structure positioned within the second enclosure, wherein the second circulation device is arranged to drive cooling fluid both through the heat exchange structure to draw heat from the second enclosure, and through the surrounding space, via the one or more apertures, to draw heat from the environmentally-sealed enclosure.