Patent ID: 7827812

Claim:
A humidity controller capable of at least a humidifying operation, comprising: a cold-and-hot water circuit through which cold-and-hot water circulates; an adsorption heat exchanger that is provided in the cold-and-hot water circuit and supports an adsorbent on the surface of the adsorption heat exchanger; and an air passage for supplying air that has passed through the adsorption heat exchanger to the inside of a room or outdoors selectively, wherein the adsorption heat exchanger is composed a first adsorption heat exchanger and a second adsorption heat exchanger, the cold-and-hot water circuit is configured to be switchable between a first cold-and-hot water circulating state in which hot water passes through the first adsorption heat exchanger and cold water passes through the second adsorption heat exchanger and a second cold-and-hot water circulating state in which the hot water passes through the second adsorption heat exchanger and the cold water passes through the first adsorption heat exchanger, and the air passage is configured to be switchable between a first air circulating state in which the air passage supplies air that has passed through the first adsorption heat exchanger to the inside of the room and discharges air that has passed through the second adsorption heat exchanger to the outdoors and a second air circulating state in which the air passage supplies air that has passed through the second adsorption heat exchanger to the inside of the room and discharges air that has passed through the first adsorption heat exchanger to the outdoors.