Patent ID: 8047776
Filing Date: 2011-11-01
Classification: F04D

Abstract:
1. Unit for treating air with controlled flow, comprising a centrifugal free rotor (GL), with single or double inlet and with inlet parallel to the axis of the centrifugal free rotor (GL) and radial expulsion of the air, said centrifugal free rotor (GL) having a central circular body (CR), on which at least one circular casing (CL) is mounted, equipped with backward facing curved blades (PL) and inserted inside a directional conveyor (CD), with single or double inlet, which comprises a casing (CDA) on the sides (F) of which said centrifugal free rotor (GL) is mounted, said casing (CDA) of said directional conveyor (CD) having at least one inlet or suction mouth (BA) for intaking air, said inlet or suction mouth being arranged at said sides (F) and at least one discharge mouth (BU) arranged at least one air outlet opening, said inlet or suction mouth (BA) being placed on a plane which is perpendicular to a plane containing said discharge mouth (BU) of the directional conveyor (CD), wherein said centrifugal free rotor (GL) is inserted inside said directional conveyor (CD) so that said circular casing (CL) of the centrifugal free rotor (GL) is arranged at a first distance (D 1 ) from said casing (CDA) of the directional conveyor (CD), characterised in that said casing (CDA) of the directional conveyor (CD) is arranged at a second distance (D 2 ) from the end of each curved blades (PL) of said central circular body (CR) of the centrifugal free rotor (GL), said first and second distances (D 1 , D 2 ) being a function of the diameter (D) of said central circular body (CR) of the centrifugal free rotor (GL), so that said directional conveyor (CD) is able to directionally exploit the high static efficiencies, typical of free rotors, and to obtain the maximum optimisation between the power supplied and the static pressure obtained, at the same time maintaining low sound emissions, low dynamic pressure values at the discharge and no perturbation of the flow and of the performance both at said discharge mouth (BU) and at said inlet or suction mouth (BA).