Patent ID: 7357621
Filing Date: 2008-04-15
Classification: F04D

Abstract:
1. An impelled air diffusion apparatus comprising a first diffuser form having a first impelled air directing side; and a second diffuser form having a second impelled air directing side; and not comprising vanes, wherein said first diffuser form and said second diffuser form is each configured for establishment radially outward of a centrifugal fan having a centrifugal fan axis of rotation, so that: (a) said first impelled air directing side and said second impelled air directing side are substantially opposite and converge as a radial distance from said centrifugal fan axis of rotation increases; (b) at least a majority of air impelled by said centrifugal fan passes between said first impelled air directing side and said second impelled air directing side; and (c) impelled air passing between said first impelled air directing side and said second impelled air directing side is output to a downflow air handling environment, and so as to: (d) radially extend an interface through which said impelled air passing between said first impelled air directing side and said second impelled air directing side is output to said downflow air handling element; (e) decrease a first velocity component of said impelled air passing between said first impelled air directing side and said second impelled air directing side, wherein said first velocity component is substantially parallel to an interface through which the discharged, impelled air is output to said downflow air handling environment; (f) increase the static pressure of said impelled air passing between the first impelled air directing side and the second impelled air directing side as a result of said decrease of the first velocity component of said impelled air; (g) control a second velocity component of said impelled air passing between the first impelled air directing side and the second impelled air directing side so as to avoid recirculation of said impelled air output to a downflow air handling environment back into a space between said first impelled air directing side and said second impelled air directing side, and (h) a flow turning element to which said impelled air is responsive, wherein said second velocity component is substantially perpendicular to said interface through which said discharged, impelled air is output to said downflow air handling environment, wherein said increase in static pressure is at least 90% the total increase in static pressure observed as said discharged, impelled air travels through said diffuser element, and wherein said downflow air handling environment comprises a plenum.