Abstract: The invention concerns an electrostatic ionic emission device for depositing on the surface of a plurality of particles aerosols within a fluid, a quasi-homogeneous amount of ions. The device comprises a discharge corona conductive electrode, and a non-corona conductive receptor electrode. The pseudo-planar active surface of its receptor electrode is covered with a quasi-uniformly distributed plurality of sharp-edged craters, enclosed by a pseudo-circle, having on their end edges a section with minimum bend radius, and enclosing orifices, emerging outwards of the active surface. Said sharp-edged craters are quasi-uniformly distributed on the active surface, in both its geometrical directions. The surface flow of ions derived from the corona electrode towards the active surface of the receptor electrode has increased homogeneity. Preferably, the receptor electrode is produced by means of an array of metal fins.

Abstract: A device (101) for airborne decontamination of a room (3) by mixing using a blown jet (19) and a suction flow (21) that are attached by the Coanda effect (C). Vertical trunk means (103) have a bottom suction end (104) and a top blow end (105). Drive means (106) set the air (A) into motion inside and outside the trunk means. An intake nozzle (118) provides a vertical suction surface (Sa) serving to suck in the air (A) as a suction stream (55) parallel to the floor (6) and attached thereto by the Coanda effect (C). A blow nozzle (129) using the surface effect at the ceiling (20) presents a frontal porous blow surface (Ss). It produces a primary jet (19) of air that is attached to the ceiling (20) by the Coanda effect (C). Decontamination means (127) decontaminate the air (A). The effective area (Sae) of the suction surface (Sa) is less than the effective area (Sse) of the blow surface (Ss).

Abstract: The invention concerns an electrostatic ionic emission device (1) for depositing on the surface (sp) of a plurality of particles (p1, p2, pn) aerosols within a fluid (F), a quasi-homogeneous amount of ions (Iq). The device (1) comprises a discharge corona conductive electrode (EC), and a non-corona conductive receptor electrode (ER). The pseudo-planar active surface (SA) of its receptor electrode (ER) is covered with a quasi-uniformly distributed plurality of sharp-edged craters, enclosed by a pseudo-circle, having on their end edges (Ai) a section with minimum bend radius, and enclosing orifices (O1, O2, On), emerging outwards of the active surface (SA). Said sharp-edged craters are quasi-uniformly distributed on the active surface (SA), in both its geometrical directions. The surface flow of ions (Iq) derived from the corona electrode (EC) towards the active surface of the receptor electrode (ER) has increased homogeneity.