This cooler is applied to cooling the high-temperature compressed air one-stage or multistage pressurized by centrifugal fan. Its design pressure is no more than 1.0 Mpa and design temperature is no more than 40℃ on water side, design pressure is no more than 2.0 Mpa and design temperature is no more than 200℃ on air side. Its cooling medium is water and cooled medium is compressed air. Its practical working parameter is subject to the technical agreement or order