Patent ID: 7052531
Filing Date: 2006-05-30
Classification: B03C,Y10S

Abstract:
1. A local cleaning system constructing a shielded space with which movement of air from external space is practically blocked at boundary region, comprising: a charged air shower unit which forms a curtain-shaped ion wind region, and a local exhaust device receiving the flowing air attributed to the ion wind, at least one said boundary region being comprised of said ion wind region, wherein said charged air shower unit comprises a discharge electrode acting as cathode; two plate-shaped anodes which surfaces are opposed with a spacing being given; and an insulating frame which insulates the discharge electrode from the anodes, and maintains the relative positions of the discharge electrode and the anodes, said anode being in contact with said frame only at the edge portions, if the region of said anode that is on the back thereof and between said edge portions is called a rear flat plate region, the rear flat plate region being opposed to said frame with an insulating space being given therebetween, and said rear flat plate region and the region of said frame that is opposed to the rear flat plate region are connected with a stud bolt.