EJECTOR DEVICE

PROBLEM TO BE SOLVED: To provide an ejector device capable of preventing deposition of solid particles in an ejector main body and capable of inhibiting damage of an inner wall of the ejector main body. SOLUTION: The ejector device includes an air current/particle mixing chamber, a carrier air current supply means supplying carrier air current into the air current/particle mixing chamber, a particle supply means supplying solid particles into the air current/particle mixing chamber via a particle supply hole, and a mixed air flow sending means sending the formed particle mixed air flow. Moreover, the device includes a laminar flow forming means comprising a bulkhead part arranged between the air current/particle mixing chamber and the carrier air current supply means and a carrier air flow-through hole provided on the bulkhead part, and sending the carrier air current passing through the carrier air current flow-through hole to the air current/particle mixing chamber as laminar flow flowing along a cylindrical inner wall surface of the air current/particle mixing chamber. The laminar flow flowing in the air current/particle mixing chamber passes through the particle supply hole touching the whole area of a projection area on an opposing inner wall surface corresponding to the particle supply hole without touching a circumference edge of the particle supply hole. COPYRIGHT: (C)2008,JPO&INPIT