Ionization device

Abstract

An ionization device includes an ionization chamber () and a charging chamber () separately prepared therefrom. The ionization chamber () has a discharge electrode () and an opposing electrode () in an interior () of a case having an ionizing gas introducing inlet (). The opposing electrode () has an orifice () communicating with outside and formed at a position opposing the tip end of the discharge electrode (). The charging chamber () is arranged adjacent to the orifice () side of the ionization chamber (). An introduction inlet () of a charge object introduction portion of the charging chamber () is arranged at the position near the exit of the orifice (). The size of the orifice () is set so that the charge object is sucked therein by a negative pressure generated when a gas containing ions is sprayed from the exit of the orifice () into the charging chamber () and the ionization chamber () has a higher pressure than the charging chamber ().