Humidity conditioning device and humidity conditioning method

A humidity conditioning device comprising:

• a moisture absorption unit, a regeneration unit, a first liquid transport flow path, and a second liquid transport flow path that has an adjustment tank in which hygroscopic liquid containing a hygroscopic substance is stored and adjusts a moisture amount of the hygroscopic liquid that is stored;
• and
• a measurement unit that measures a concentration of the hygroscopic substance that is contained in the hygroscopic liquid stored in the adjustment tank, wherein
• the moisture absorption unit, the regeneration unit, the first liquid transport flow path, and the second liquid transport flow path includes
• absorption means of sending air outside the moisture absorption unit, the regeneration unit, the first liquid transport flow path, and the second liquid transport flow path to an inner space of the moisture absorption unit, the regeneration unit, the first liquid transport flow path, and the second liquid transport flow path, making the air contact with the hygroscopic liquid in the inner space, and causing moisture contained in the air to be absorbed by the hygroscopic liquid,
• an ultrasonic wave generation unit that irradiates at least a part of the hygroscopic liquid, which has absorbed the moisture, with an ultrasonic wave,
• a heating unit that heats the hygroscopic liquid that has absorbed the moisture, and
• removal means of removing an atomized droplet generated from the hygroscopic liquid that has absorbed the moisture,
• the atomized droplet contains a first droplet and
• a second droplet whose particle size is larger than a particle size of the first droplet,
• a concentration region of the hygroscopic substance relative to total mass of the hygroscopic liquid includes a first concentration region in which the first droplet is generated, and
• a second concentration region in which the second droplet is generated and in which concentration is lower than that in the first concentration region, and
• the moisture amount of the hygroscopic liquid is adjusted so that the concentration is in the first concentration region on a basis of a measurement result obtained by at least the measurement unit.