Foaming device

Abstract

Device ( 100 ) for producing fluid foam comprising a container ( 10 ) where the fluid can be accommodated, and a foaming tool ( 20 ) being rotatable in the inner volume of the container ( 10 ); such that the texture and the porosity of the fluid foam obtained are provided by shear energy coming from Couette Flow effect and depend on the dimension of the foaming tool ( 20 ) with respect to the inner volume of the container ( 10 ), on the location of the foaming tool ( 20 ) from the bottom ( 11 ) of the container and on the rotation speed of the foaming tool ( 20 ).

1 . Device for producing fluid foam comprising:
 a container where the fluid can be accommodated; and   a foaming tool being rotatable in the inner volume of the container,   such that the texture and the porosity of the fluid foam obtained are provided by shear energy coming from Couette Flow effect and depend on the dimension of the foaming tool with respect to the inner volume of the container, on the location of the foaming tool from the bottom of the container and on the rotation speed of the foaming tool.   
     
     
         2 . Device for producing fluid foam according to  claim 1 , wherein the dimension of the foaming tool is between half and close to the inner dimension of the container measured at the location where the foaming tool is arranged inside the container. 
     
     
         3 . Device for producing fluid foam according to f  claim 1 , wherein the foaming tool is arranged at a distance from the bottom of the container comprised between 3H/4 and H/4, where H is the height of the fluid inside the container. 
     
     
         4 . Device for producing fluid foam according to  claim 1 , wherein the foaming tool is configured as a whisk or as a disc and the inner shape of the container is cylindrical or frusto-conical. 
     
     
         5 . Device for producing fluid foam according to  claim 1 , wherein the foaming tool rotates in the inner volume of the container at a speed comprised between 2500 rpm and 4000 rpm. 
     
     
         6 . Device for producing fluid foam according to  claim 1 , wherein the foaming tool is arranged either centred or offset with respect to the centre of the inner volume of the container. 
     
     
         7 . Device for producing fluid foam according to  claim 1 , comprising a driving unit configured to drive in rotation the foaming tool inside the container. 
     
     
         8 . Device for producing fluid foam according to  claim 7 , wherein the driving unit comprises a motor mechanically coupled to the foaming tool to entrain it in rotation. 
     
     
         9 . Device for producing fluid foam according to  claim 7  wherein the driving unit is configured to generate a magnetic field in response to which the foaming tool is made to rotate inside the container. 
     
     
         10 . Device for producing fluid foam according to  claim 1 , comprising a control unit to control the temperature of the fluid and/or the rotational speed of the foaming tool and/or the positioning of the foaming tool with respect to the bottom of the container and/or the dimension of the foaming tool and/or if the foaming tool is centred or offset inside the container and/or the height H of the fluid inside the container. 
     
     
         11 . Device for producing fluid foam according to  claim 1 , comprising a heating unit able to heat the fluid inside the container. 
     
     
         12 . Device for producing fluid foam according to  claim 1 , wherein the foaming tool comprises at least one aperture to compensate the suction effect with respect to the bottom of the container. 
     
     
         13 . Device for producing fluid foam according to  claim 12 , wherein the foaming tool comprises two apertures symmetrically arranged. 
     
     
         14 . Device for producing fluid foam according to  claim 1 , comprising one or a plurality of disturbing elements arranged on the foaming tool and/or on the inner walls of the container and/or on the lower side of the foaming tool and/or on the bottom of the container. 
     
     
         15 . Device for producing fluid foam according to  claim 14 , the disturbing elements being configured as undulations, having a depth of between 0.5 mm and 5 mm.