Patent ID: 8778161

Claim:
An electrode block comprising: (a) a set of three AC application electrodes, each being bent in a V shape, arranged on a concentric circle, symmetrically with respect to a point, being placed in a target fluid to be subjected to reforming; (b) a ground electrode surrounding the AC application electrodes or placed inside the AC application electrodes; (c) a polarity switching circuit comprising three switching circuits connected in parallel, each of the three switching circuits having a pair of switching elements connected in series at a connecting point, one of each the three AC application electrodes connected to one of each connecting point of one of each pair of switching elements; (d) three driving gate circuits, one of each of the three driving gate circuits connected to one of each pair of switch elements for switching; (e) an operation setting circuit connected to each of the three driving gate circuits for switching the pair of switching elements and setting polarity of the three AC application electrodes in accordance with the electrode specification, so that a first one of the AC application electrodes is a positive electrode, a second one of the AC application electrodes is a negative electrode, and a third one of the AC application electrodes is a ground electrode; and (f) a constant current supply having a current detector for detecting current that flows between the AC application electrodes in fluid reforming, the constant current supply supplying current to the polarity switching circuit so that the current value detected by the current detector constant.