Desiccant air conditioner

A desiccant air conditioner comprising an intake path that introduces air from outdoors to indoors;

• an exhaust path that exhausts air from indoors to outdoors;
• a desiccant rotor adapted to perform dehumidification by adsorbing moisture in the air flowing through the intake path and regenerate a dehumidifying capacity by releasing moisture into the air flowing through the exhaust path;
• heating heat exchangers that heat the air in the exhaust path;
• and a sensible heat exchanger that performs heat exchange between the air flowing through the intake path and the air flowing through the exhaust path,
• wherein two dehumidification regions through which the air in the intake path passes and two regeneration regions through which the air in the exhaust path passes are alternately formed in the desiccant rotor,
• the air flowing through the intake path flows through the two dehumidification regions in series, and the air flowing through the exhaust path flows through the two regeneration regions in series,
• the air that has passed through the first regeneration region is further heated by one of the heating heat exchangers and subsequently passes through the second regeneration region, and
• the air that has passed through the first regeneration region, in an entire amount thereof, is brought back to an inflow surface side of the first regeneration region and then is allowed to flow through the second regeneration region from a same side as the inflow surface side of the first regeneration region.