| 摘要 |
A humidifying device ( 10 ), for humidifying a gas with the water vapor contained in air, comprises: a hollow fiber bundle ( 14 ) formed by bundling a plurality of hollow fibers ( 14 a) permeable by water vapor, the hollow fibers being orientated in a direction of a predetermined axis; a housing ( 12 ) having a space for accommodating the hollow fiber bundle ( 14 ), and having an introduction port ( 12 a) for the gas to be humidified, communicating to bores of the hollow fibers, a discharging port ( 12 b) for the gas to be humidified, communicating to the interior spaces of the hollow fibers, an air inlet ( 12 c) communicating to a space in the housing external of the hollow fibers, and an air exit ( 12 d) communicating to the space in the housing external of the hollow fibers; and blowing means ( 16 ) arranged at the air inlet ( 12 c) of the housing for introducing air into the housing, wherein a ratio between a sum of the cross-sectional areas of the hollow fibers taken along a plane perpendicular to the axis, and the cross-sectional area of an air passage, is set within a range from 0.1 to 0.7, the cross-sectional area of the air passage being obtained by subtracting the sum of the cross-sectional areas of the hollow fibers from the cross-sectional area of the space of the housing ( 12 ) taken along a plane perpendicular to the axis.
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