Device for spraying dry ice, particularly frozen carbon dioxide, and nozzle for said device

Abstract

The invention concerns a device for spraying particles of dry ice, in particular for cleaning surfaces, comprising a gun ( 10 ) for orienting a drive fluid entraining said particles in a first direction, and a spray nozzle ( 4 ) for passage of said drive fluid loaded with said particles, said nozzle ( 4 ) comprising a neck ( 6 ). According to the invention, said device is configured so as to orient the fluid loaded with said particles in at least one other direction upstream of the neck ( 6 ) in the direction of flow of the drive fluid.

1 .- 2 . (canceled) 
     
     
         3 . A device for spraying particles of dry ice, comprising a gun for orienting a drive fluid entraining said particles in a first direction, and a spray nozzle for passage of said drive fluid loaded with said particles, said nozzle comprising a neck, wherein said device is configured to orient said drive fluid loaded with said particles in at least one other direction upstream of the neck in the direction of flow of the drive fluid, and in that the nozzle is configured to divert the drive fluid loaded with said particles in the other direction or directions, as follows:
 the nozzle comprises a diversion portion able to modify the path of said drive fluid loaded with said particles, from said first direction into said other direction or directions, said diversion portion being situated upstream of the neck;   the nozzle comprises a convergent device wherein said diversion portion is situated at least partly at said convergent device.   
     
     
         4 . The device according to claim  1 , in which the nozzle further comprises a portion with a constant cross-section situated upstream of the convergent device in the direction of flow of the drive fluid, said portion with a constant cross-section being able to guide the drive fluid loaded with said particles in said first direction.