Patent ID: 7090717

Claim:
An air purifier, comprising: an ionizer comprising a first electrode including a single plate having at least two hollow semi-cylindrically shaped electrodes being connected successively and in parallel and forming a corrugated shape, a plurality of air holes perforated in the surface of the at least two hollow semi-cylindrically shaped electrodes, said air holes having a shape which allows both air and dust particles to pass smoothly therethrough without collection of said dust particles; at least two second electrodes, the at least two second electrodes comprising discharge wire electrodes for charging said dust particles and being positioned at inner spaces defined by the at least two hollow semi-cylindrically shaped electrodes, respectively; and a collector downstream of said first and second electrodes and electrically charged to have a polarity opposite to a polarity of charged dust particles for collection of said particles on said collector by electrostatic attraction.