Answer: The saturated water content of compressed air (the load entering the dryer) is inversely proportional to the pressure, that is, the lower the working pressure, the higher the dryer load. The heatless adsorption dryer dries and achieves the dehumidification effect through pressure change (i.e. pressure change). The greater the pressure difference of the airflow during desiccant regeneration, the more moisture is sucked out of the desiccant by the regenerated gas, the better the regeneration effect of the desiccant, and the better the drying effect in the next working cycle. Generally speaking, heatless adsorption dryers have their rated minimum working pressure, otherwise the drying effect set by the dryer cannot be achieved.