Answer: The heat regeneration adsorption dryer achieves the drying effect through "temperature change". Because the air's ability to hold water vapor is proportional to the temperature.
The internally heated adsorption dryer allows a small amount of dry air (called regeneration gas) to flow through the desiccant layer to be regenerated and starts the heater built into the barrel. The high-temperature air generated will absorb the moisture in the desiccant and take it out of the dryer.
One type of externally heated adsorption dryer allows a small amount of dry air (called regeneration gas) to flow through the external heater and then blow through the desiccant layer to be regenerated. The high-temperature dry air generated will absorb the moisture in the desiccant and take it out of the dryer. Another type of externally heated adsorption dryer is to use a blower to blow ordinary air through the heater external to the barrel. The high-temperature air generated can absorb the moisture in the desiccant and take it out of the dryer. This type of externally heated adsorption dryer does not require compressed air, that is, the consumption of regeneration gas is zero.
