Electrostatic detector of aerosol particles
AssigneeCommissariat a l'Energie Atomique
InventorMichel Pourprix
Life of this patent
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Abstract
Electrostatic detector according to claim 2, characterized in that it is constituted by a flattened circular cylindrical case (2) having two axial pipes, one for injecting a gas (4) into the lower part of the case and the other for extracting the gas (8) in the upper part of said case, the latter being provided on its upper periphery with an annular slot (12) for the entry of the atmosphere to be analyzed and, in its center, a solid thick disk (14), whose upper face supports one of the two conductive disks (16), the second conductive disk (18) being constituted by the upper cover of the case, the injection gas flow passing round the thick disk after passing through a filter (20) for the purification and uniform distribution of its flow.
Claims15
Electrostatic detector for aerosol particles contained in an atmosphere to be examined, characterized in that it comprises two parallel, spaced, coaxial conductive disks (16, 18) between which is established an electric field raising them to different potentials, each said disk having a center and a peripheral region disposed radially outwardly of, and completely surrounding, said center, and said two disks delimiting a space which extends between said center and said peripheral region of each said disk, fluid delivery means disposed for delivering the atmosphere to be examined to said space at a location adjacent said peripheral regions of said disks, and a central suction tube (8) communicating with said space adjacent said centers of said disks in order to bring about a flow in said space from the peripheral regions of the disks to the suction tube, of at least part of said atmosphere in the form of a stable, centripetal, laminar flow.
Dependencies are inferred from the claim text.