Digital low-carbon roof air conditioning unit

The invention relates to the technical field of roof air conditioning units, in particular to a digital low-carbon roof air conditioning unit which comprises a unit body and an air conditioning support arranged at the bottom of the unit body. The unit comprises an inverter compressor, a fresh air primary prefilter, a carbon dioxide concentration probe, a direct expansion coil, a condensation water disc, a plate tube type evaporative cooler, a plasma descaling device, an EC fan, an air supply outlet, a control box, a box body, a heat exchanger and a condensation fan. A plasma descaling device, a drainage pipe and a water supplementing pipe are sequentially arranged on the rear side of the plate and tube type evaporative cooler from left to right, a fresh air hood and a condensate pipe are sequentially arranged on the rear side of the box body from left to right, an air return main pipe is arranged on the front side of the box body, and an air supply main pipe is arranged on the right side of the box body. The