▎ 摘　　要

NOVELTY - The detector has a shell provided with an air inlet, an air outlet, a fan and a negative ion generator and formed with a filter layer, which is formed with a side part of the air inlet. The generator is connected with the air outlet. A direct current (DC) voltage generating device generates voltage for about 12 DC voltage. A piezoelectric transformer is connected with an output end of the DC voltage generating device. A graphene release electrode is provided with a release electrode cylinder structure. A graphene material is provided with a graphene by preforming extrusion molding process. USE - Negative ion detector. ADVANTAGE - The detector improves purity and dose without accompanying large amount of ozone is generated. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a negative ion detector. '(Drawing includes non-English language text)'