Patent ID: 7267712

Claim:
A planar electric precipitator for an air stream, comprising: planar electrode plate made of electricity-conducting material, having a plurality of electrode units arrayed thereon, each of said electrode units having at least one electrode opening with an inner periphery having at least two electrode tips; a planar collecting plate, generally parallel to and downstream of said electrode plate and made of electricity-conducting material, having a plurality of collecting units arrayed thereon, each of said collector units having at least one air hole and at least one collector surface which is oriented transverse to a bulk air stream direction and positioned downstream of said corresponding electrode unit; wherein direct electric voltage is applied between said electrode plate and said collecting plate, so that air passing through is exposed to high electric fields close to said electrode tips of said electrode units, ionizing suspended particles and trapping ionized particles at said collecting plate, so that an air-cleaning effect results.