Flooded heat exchanger capable of achieving online deicing and descaling

The invention discloses a flooded heat exchanger capable of achieving online deicing and descaling, and belongs to the field of cooling and heating systems for buildings. The flooded heat exchanger comprises a housing, a water inlet pipe box, a water outlet pipe box, a gear box, an electric linkage device, a mechanical deicing and descaling device, a heat exchange pipe, a pipe plate, a partition plate, a supporting partition plate and a turbulence device, wherein a housing pass inlet pipe and a housing pass outlet pipe are arranged on the housing; and the water inlet pipe box and the water outlet pipe box are arranged at the front end and the rear end of the housing. According to the flooded heat exchanger, the mechanical deicing and descaling device is mounted in the heat exchange pipe, ice layers and water scale growing in the heat exchange pipe are cut and removed, the deicing and descaling effects in the continuous working state can be achieved without stopping operation of equipment, and the flooded heat