Multiple flow delivery uni

Abstract

A multiflow delivery unit has a first conduit ( 2 ) with a first inlet end ( 4 ) for connection to the water mains (W) and a first outlet end ( 5 ) for delivery of a water flow, a second conduit ( 3 ) with a second inlet end ( 6 ) for connection to an airflow supply line (A) and a second outlet end ( 7 ) for delivery of the airflow. One of the two conduits ( 2, 4 ) is at least partially contained in the other whereby the first outlet end ( 5 ) and the second outlet end ( 7 ) are substantially coplanar. A substantially tubular diffuser ( 8 ) is provided between the conduits ( 2, 3 ) at their respective outlet ends ( 5, 7 ). The diffuser ( 8 ) has a first passage ( 9 ) connected to the first outlet end ( 5 ) and a plurality of second passages ( 10 ) separate from the first passage ( 9 ) and connected to the second outlet end ( 7 ). The upstream end face of the diffusor is flat whereas the downstream end face ( 13 ) has an inwardly converging countersunk annular surface ( 17 ) at the periphery of the first passage ( 9 ). The second passages have outlet sections ( 16 ) for delivering air in corresponding direction (Y) which are converging toward the longitudinal axis (L) of the diffuser.

1 . A multiflow delivery unit, comprising:
 a first water conduit ( 2 ) with a first inlet end ( 4 ) for connection to the water mains (W) and a first outlet end ( 5 ) for water flow delivery;   a second water conduit ( 3 ) with a second inlet end ( 6 ) for connection to airflow supply means (A) and a second outlet end ( 7 ) for airflow delivery;   wherein one of said conduits ( 2 ,  3 ) is entirely contained in the other, and wherein said first outlet end ( 5 ) and said second outlet end ( 7 ) are substantially coplanar, a diffuser ( 8 ) being further provided, which has a substantially tubular shape and a longitudinal axis (L) interposed between said conduits ( 2 ,  3 ) at said outlet ends ( 5 ;  7 ), said diffuser ( 8 ) having a first passage ( 9 ) connected to said first outlet end ( 5 ) and at least one second passage ( 10 ) separate from the first passage ( 9 ) and connected to said second outlet end ( 7 ) for delivery of respective flows;   characterized in that said diffuser ( 8 ) has an upstream end face ( 12 ) and a downstream end face ( 13 ), as oriented relative to respective water and air flows, said upstream end face ( 12 ) being substantially flat and said downstream end face ( 13 ) having an inwardly converging countersunk annular surface ( 17 ) at the periphery of said at least one first passage ( 9 ), said second passage having an outlet section ( 16 ) at said annular surface ( 17 ) for the outflow of air in a corresponding direction (Y) converging toward said longitudinal axis (L).   
     
     
         2 . A delivery unit as claimed in  claim 1 , characterized in that said first conduit ( 2 ) is substantially coaxial with said second conduit ( 4 ). 
     
     
         3 . A delivery unit as claimed in  claim 1 , characterized in that said diffuser ( 8 ) has a substantially annular shape, said at least one first passage ( 9 ) being provided at a substantially central position, and said at least one second passage ( 10 ) being provided at the periphery of said first passage ( 9 ), with a substantially curved cross section. 
     
     
         4 . A delivery unit as claimed in  claim 3 , characterized in that said diffuser ( 8 ) comprises a plurality of second longitudinal passages ( 10 ) having identical cross sections and arranged in evenly and angularly offset positions. 
     
     
         5 . A delivery unit as claimed in  claim 1 , characterized in that said outlet cross section ( 16 ) is smaller than the cross section of said second end ( 7 ) of said second conduit ( 3 ). 
     
     
         6 . A delivery unit as claimed in  claim 1 , characterized in that it comprises a connecting sleeve ( 18 ) with a third conduit ( 19 ) and a fourth conduit ( 22 ), wherein said third conduit ( 19 ) has a first inlet port ( 20 ) connected to the water mains (W) and a first outlet port ( 21 ) connected to said first inlet end ( 4 ) and wherein said fourth conduit ( 22 ) has a second inlet port ( 23 ) connected to airflow supply means (A) and to a second outlet ort ( 24 ) connected to said second inlet end ( 6 ). 
     
     
         7 . A delivery unit as claimed in  claim 1 , characterized in that it comprises flow control means ( 26 ) of manual and/or automatic types, which are adapted to control water flow in said first outlet end ( 5 ). 
     
     
         8 . A delivery unit as claimed in  claim 7 , characterized in that said flow control means ( 26 ) are adapted to vary the ratio of the flows coming from respective hot water and cold water circuits (W H , W C ) connected to the water mains (W), in the first outlet end ( 5 ).