Patent ID: 7472553

Claim:
A humidity controller apparatus which takes in a first air stream and a second air stream and supplies to an indoor space either the first air stream dehumidified or the second air stream humidified, wherein: the humidity controller apparatus comprises a first adsorption unit and a second adsorption unit, each of the first and second adsorption units having a respective adsorbent which is brought into contact with air, the humidity controller apparatus is configured to perform, repeatedly alternately at a predetermined switching time interval, a first operation in which the second air stream is humidified as a result of regeneration of the adsorbent of the first adsorption unit while, simultaneously, the first air stream is dehumidified in the second adsorption unit and a second operation in which the second air stream is humidified as a result of regeneration of the adsorbent of the second adsorption unit while, simultaneously, the first air stream is dehumidified in the first adsorption unit, and the humidity controller apparatus is provided with interval set means for setting the predetermined switching time interval depending on the load of the humidity controller apparatus.