Patent ID: 7975992

Claim:
A humidity adjustment apparatus comprising: a plurality of hollow fiber membranes in each of which a fluid having a partial water vapor pressure and a fluid having a different partial water vapor pressure respectively flow in an inside space and an outside space, to transfer water molecules between the fluids, and to thereby humidify the fluid having a lower partial water vapor pressure among the fluids; a hollow fiber membrane module including the plurality of hollow fiber membranes; a housing provided with a hollow therein to house the hollow fiber membrane module; and a sealing section to divide the outside space of each of the hollow fiber membranes in the hollow of the housing into a plurality of outside space portions; wherein: the housing is provided with a partition of which at least one end portion is separated from an inner wall of the housing; a plurality of hollow portions are formed in the housing by parting the hollow with the partition; a first hollow portion of the hollow portions communicates with at least a second hollow portion of the hollow portions; the hollow fiber membrane module is housed in each of the hollow portions; and the sealing section is provided at each of both end portions of the hollow fiber membrane module in each of the hollow portions.