Patent ID: 8834615
Filing Date: 2014-09-16
Classification: B01D

Abstract:
1. An air cleaning unit comprising a case having an air inlet on a top side of the case and an air outlet on a bottom side of the case opposing the top side; an inlet pipe from outside of the case joined to the top side of the case surrounding the air inlet where the air inlet and the inlet pipe cover a portion of the top side of the case; an acid/alkaline filter device housed in the inlet pi e covering the air inlet the acid/alkaline filter device comprising a first filter layer absorbing acid gases and a second filter layer absorbing alkaline gases; a blower inside the case beneath the air inlet; a flow balance device inside the case at a distance below the blower; a particle filter device inside the case at a distance below the flow balance device; and an ion production device beneath the particle filter device immediately above and covering the air outlet; wherein the blower draws outside air through the acid/alkaline filter device and produces an air flow through the case towards the air outlet; the acid/alkaline filter device absorbs acid/alkaline gases from the outside air; the particle filter device traps particles from the air flow; and the ion production device adds ions into the air flow.