A "cold dryer" is the abbreviated term for a refrigerated air dryer. Incorporating cutting-edge technology, it serves as a key air source treatment component within pneumatic systems.
By facilitating a heat exchange between a refrigerant and compressed air, the device lowers the temperature of the compressed air to a dew point ranging between 2°C and 10°C. Driven by the continuous growth of the refrigerated dryer sector, an increasing number of enterprises are entering the air compressor industry; consequently, interest in the cold dryer market is on the rise, and many companies have successfully distinguished themselves within this competitive landscape.
Refrigerated dryers are classified into two types based on their condenser cooling method: air-cooled and water-cooled.
Based on inlet air temperature, they are categorized into high-temperature inlet models (below 80°C) and standard-temperature inlet models (approximately 45°C).
Based on operating pressure, they are classified into standard-pressure models (0.3–1.0 MPa) and medium-to-high-pressure models (above 1.2 MPa).
Furthermore, many specialized models of refrigerated dryers are designed to process non-air gaseous media-such as carbon dioxide, hydrogen, natural gas, blast furnace gas, and nitrogen-in addition to compressed air.