air diffuser and an air circulation system

Abstract

An air diffuser comprising a body, at least one swirl pattern discharge element and at least one jet pattern discharge element, wherein the jet pattern discharge element is manipulable to vary the airflow direction angle of a discharged jet pattern of air relative to an axis perpendicular to a discharge face of the swirl pattern discharge element to thereby alter the angle of the air discharged from the swirl pattern discharge element.

1 . An air diffuser comprising a body, at least one swirl pattern discharge element and at least one jet pattern discharge element, wherein the jet pattern discharge element is manipulable to vary the airflow direction angle of a discharged jet pattern of air relative to an axis perpendicular to a discharge face of the swirl pattern discharge element to thereby alter the angle of the air discharged from the swirl pattern discharge element. 
     
     
         2 . An air diffuser in accordance with  claim 1 , wherein the body is substantially cylindrical in shape. 
     
     
         3 . An air diffuser in accordance with  claim 1 , wherein the swirl pattern discharge element includes a plurality of radial vanes arranged to discharge a swirl pattern of air. 
     
     
         4 . An air diffuser in accordance with  claim 1 , wherein the jet pattern discharge element includes a nozzle arranged to discharge a jet pattern of air. 
     
     
         5 . An air diffuser in accordance with  claim 4 , wherein the nozzle discharge direction is adjustable relative to an axis perpendicular to the discharge face of the diffuser. 
     
     
         6 . An air diffuser in accordance with  claim 4 , wherein the volume flow rate of the jet pattern discharge element is adjusted by a damper located at least partly within the nozzle. 
     
     
         7 . An air diffuser in accordance with  claim 4 , wherein, on application of a largely constant pressure of air to the diffuser, adjustment of the nozzle damper alters the diffuser axial throw of the combined jet pattern and swirl pattern of discharged air relative to the plane of the swirl diffuser discharge face. 
     
     
         8 . An air diffuser in accordance with  claim 1 , wherein adjustment of at least one of the diffuser discharge direction, axial throw and volume flow rate is performed by at least one actuator. 
     
     
         9 . An air diffuser in accordance with  claim 8 , wherein the operation of the diffuser is performed by actuator driven manipulation of at least one of the elements. 
     
     
         10 . An air diffuser in accordance with  claim 9 , wherein manipulation of at least one element is performed by at least one actuator that is powered and regulated by supply air temperature or pressure alone. 
     
     
         11 . An air diffuser in accordance with  claim 7 , wherein the swirl pattern discharge element includes a plurality of radial vanes arranged to discharge a swirl pattern of air, and wherein the volume flow rate of the swirl discharge pattern is adjustable or may be preset by a damper upstream of, or integrated into, the radial vanes. 
     
     
         12 . An air diffuser in accordance with  claim 11 , wherein on the application of a largely constant volume flow rate of air to the diffuser, adjustment of the swirl discharge pattern volume flow rate changes the supply air pressure to the diffuser thereby changing the discharge velocity of the nozzle, in turn altering the diffuser axial throw of the combined jet pattern and swirl pattern of discharged air relative to the plane of the swirl diffuser discharge face. 
     
     
         13 . An air diffuser assembly for use in combination with a wall, bulkhead, ceiling or floor air delivery system comprising an air diffuser in accordance with  claim 1 , and at least one mounting device arranged to connect the air diffuser to the wall, bulkhead, ceiling and/or floor. 
     
     
         14 . An air diffuser including a body, at least one swirl discharge pattern element and at least one jet discharge pattern element, wherein, on the application of a largely constant air supply pressure, the diffuser maintains a largely constant axial throw of the combined jet and swirl patterns of discharged air along an axis perpendicular to the plane of the swirl diffuser discharge face as the diffuser supply airflow rate is varied. 
     
     
         15 . An air diffuser in accordance with  claim 14 , further including the features of  claim 1 . 
     
     
         16 . An air diffuser assembly in accordance with  claim 13 , further including the features of  claim 14 . 
     
     
         17 . An air diffuser comprising a body, at least one swirl discharge pattern element and at least one jet discharge pattern element arranged to be manipulated to alter a diffuser axial throw discharge direction and volume flow rate. 
     
     
         18 . An air diffuser in accordance with  claim 17 , further comprising at least one horizontal nozzle guide vane. 
     
     
         19 . An air diffuser in accordance with  claim 17 , further comprising a vertical nozzle guide vane.