Aerator

Abstract

The invention relates to a jet regulator (1) having at least one jet splitter (2) which divides the inflowing waterflow, having a sleeve-shaped internal housing (3) which is encased by an external housing (4), and having at least one ventilation duct (5) which is disposed between the internal housing (3) and the external housing (4) and has at least one inflow opening (6) and at least one passage opening (7) which is provided on the housing circumference of the internal housing (3). It is a characteristic of the jet regulator (1) according to the invention that the at least one jet splitter (2) is configured as an atomizer nozzle which divides the inflowing waterflow into a substantially hollow-conical water jet, and that an impact zone (19) of an encircling annular shape is disposed in the flow direction below the at least one passage opening (7) on the internal circumference of the internal housing (3), the water jet divided so as to be hollow-conical impacting the housing internal circumference of the internal housing (3) in said impact zone (19) (cf. FIG. 2).

1 . A jet regulator ( 1 ), comprising:
 at least one jet splitter ( 2 ) configured to divide an inflowing water flow,   a sleeve-shaped internal housing ( 3 ) encased by an external housing ( 4 ),   at least one ventilation duct ( 5 ) disposed between the internal housing ( 3 ) and the external housing ( 4 ), the at least one ventilation duct includes at least one inflow opening ( 6 ) and at least one passage opening ( 7 ) provided on a housing circumference of the internal housing ( 3 ),   wherein the at least one jet splitter ( 2 ) is configured as an atomizer nozzle which divides the inflowing water flow into a substantially hollow-conical water jet,   an impact zone ( 19 ) of an encircling annular shape of the internal housing ( 3 ) is located, in a flow direction, below the at least one passage opening ( 7 ) on an internal circumference of the internal housing ( 3 ), and   the hollow-conical water jet impacts the housing internal circumference of the internal housing ( 3 ) in said impact zone ( 19 ).   
     
     
         2 . The jet regulator as claimed in  claim 1 , wherein the ventilation duct ( 5 ) is configured as an annular gap located between the internal housing ( 3 ) and the external housing ( 4 ). 
     
     
         3 . The jet regulator as claimed in  claim 1 , further comprising at least one cross-sectional constriction ( 20 ) in the at least one ventilation duct ( 5 ). 
     
     
         4 . The jet regulator as claimed in  claim 1 , wherein the at least one cross-sectional constriction ( 20 ) is configured as an annular flange which projects on an internal circumference of the external housing ( 4 ). 
     
     
         5 . The jet regulator as claimed in  claim 4 , wherein the at least one cross-sectional constriction ( 20 ) in the flow direction of the water jet flowing through the jet regulator ( 1 ) is located below the at least one passage opening ( 7 ). 
     
     
         6 . The jet regulator as claimed in  claim 1 , wherein the internal housing ( 3 ) tapers or narrows toward an outflow side thereof. 
     
     
         7 . The jet regulator as claimed in  claim 6 , wherein the internal housing ( 3 ) tapers or narrows in stages. 
     
     
         8 . The jet regulator as claimed in  claim 1 , further comprising a flow rectifier ( 22 ) which includes at least one of a mesh structure, net structure or honeycomb structure having flow-conducting passage bores ( 23 ) located on an outflow side of the internal housing ( 3 ). 
     
     
         9 . The jet regulator as claimed in  claim 8 , wherein at least the majority of the passage bores ( 23 ) in the flow direction have a longitudinal extent which is larger in comparison to a maximum width of the passage bores ( 23 ). 
     
     
         10 . The jet regulator as claimed in  claim 8 , wherein the flow rectifier ( 22 ) is integrally molded on the internal circumference of the internal housing ( 3 ). 
     
     
         11 . The jet regulator as claimed in  claim 8 , further comprising at least one perforated plate ( 24 ) located upstream of the flow rectifier ( 22 ) in the flow direction. 
     
     
         12 . The jet regulator as claimed in  claim 11 , wherein the at least one perforated plate ( 24 ) has bores ( 25 ), and a maximum width of the bores is smaller in comparison to a width of the passage bores ( 23 ) of the flow rectifier ( 22 ). 
     
     
         13 . The jet regulator as claimed in  claim 11 , wherein the at least one perforated plate ( 24 ) is inserted in a housing interior of the internal housing ( 3 ). 
     
     
         14 . The jet regulator as claimed in  claim 1 , wherein the external housing ( 4 ) on an inflow-proximal housing circumference thereof has a thread ( 28 ) configured to interact with a mating thread on a water outflow end of a sanitary outflow fitting. 
     
     
         15 . The jet regulator as claimed in  claim 1  , wherein the internal housing ( 3 ) has at least one insert detent ( 26 ), and the internal housing ( 3 ) is insertable into the external housing ( 4 ) until the insert detent ( 26 ) bears on a contact face provided on a housing internal circumference of the external housing ( 4 ). 
     
     
         16 . The jet regulator as claimed in  claim 15 , wherein the insert detent ( 26 ) is configured as a segmented or encircling annular shoulder. 
     
     
         17 . The jet regulator as claimed in  claim 15 , wherein at least one cross-sectional constriction ( 20 ) is located in the at least one ventilation duct ( 5 ), and an inflow-proximal end face of an annular flange serving as the cross-sectional constriction ( 20 ) serves as the contact face for the at least one insert detent ( 26 ). 
     
     
         18 . The jet regulator as claimed in  claim 1 , wherein the inflow opening ( 6 ) of the at least one ventilation duct ( 5 ) is provided on an outflow side of the jet regulator ( 1 ). 
     
     
         19 . The jet regulator as claimed in  claim 18 , wherein at least one of (a) an outflow-proximal peripheral end region of the external housing ( 4 ) is angled in a direction toward the internal housing ( 3 ) or (b) an outflow-proximal peripheral end region of the internal housing ( 3 ) is angled in a direction toward the external housing ( 4 ). 
     
     
         20 . The jet regulator as claimed in  claim 1 , wherein the at least one jet splitter is a single, jet splitter ( 2 ), and the longitudinal axes of the single jet splitter ( 2 ), the internal housing ( 3 ) and the external housing ( 4 ) are mutually coaxial. 
     
     
         21 . The jet regulator as claimed in  claim 1 , wherein the jet splitter ( 2 ) is configured to be latched on an inflow-proximal end side of the internal housing ( 3 ). 
     
     
         22 . The jet regulator as claimed in  claim 1 , wherein the jet splitter ( 2 ) is configured as an atomizer nozzle and has a swirl chamber ( 9 ), at least one supply channel ( 11 ) which is oriented transversely to a nozzle longitudinal axis and extends tangentially into the swirl chamber ( 9 ) opening into said swirl chamber ( 9 ), at least one inflow channel is disposed upstream of each said supply channel ( 11 ) in the flow direction, and the swirl chamber ( 9 ) in an outflow direction tapers in a direction toward a nozzle channel ( 12 ), the hollow-conical water jet exiting into the internal housing ( 3 ) at a duct end region of said nozzle channel ( 12 ).