| 摘要 |
A surface static reduction device comprises a gun (1) defining an ionising chamber (16) in communication with an outlet nozzle (11), and means to provide a flow of air through the ionising chamber. Within the ionising chamber (16) are positive and negative corona discharge points (22), connected to a high voltage supply cable arranged to supply high voltages to the electrodes, the voltage to be supplied to the positive electrode being of larger magnitude than that to be supplied to the negative electrode. High value resistors (27) are provided within the gun between the supply cable (7) and the positive and negative electrodes (22), each with a resistance in the range 40-500 Mohm. Such a device can be intrinsically safe even for use in an inflammable atmosphere. |
