US Patent 11759541 Air treatment unit

An air treatment unit has: a frame; a source of UV light; and an air moving assembly that causes air within a space to be directed into a volume that has UV light rays therein from the source of UV light. The air treatment unit has a primary treatment volume. The frame has an air guidance assembly that extends substantially fully around an axis extending through the primary treatment volume and defines at least one elongate opening through which disinfected air is communicated from the primary treatment volume in a pattern substantially fully around the axis to outside of the frame and the air treatment unit in a radial direction within a region of the space outside of the primary treatment volume.