Abstract: A humidifier for fuel cells includes a housing with a heat-exchange plate formed therein, the plate defining first and second gas passages having gas inlets and outlets, respectively; a plurality of apertures formed on the plate; and a plurality of reservoirs fixed under the apertures and filled with a water absorbable and permeable stuffing material for trapping and storing water. The water permeable stuffing material may be disposed in the first gas passage. Cool, dry oxygen/air is channeled to the first gas passage and conveyed to an oxygen/air inlet of the fuel cell, and high-temperature, high-moisture exhaust gas discharged from the fuel cell is introduced to the second gas passage, such that water and heat of the exhaust gas in the second gas passage are recycled by the heat-exchange plate and conveyed to the first gas passage, thereby achieving the humidification effect and improving electricity-generating efficiency of the fuel cell.

Abstract: The present invention provides a humidifier for fuel cells having a housing, a metal heat-exchange plate, a water-trapping reservoir, water permeable stuffing material and water absorbable and permeable stuffing material; the heat-exchange plate, disposed in the housing, divides the housing into a first gas passage and a second gas passage, the water permeable stuffing material is disposed in the first gas passage, and the water saturation aperture and the water-trapping reservoir are disposed underneath the heat-exchange plate with the water-trapping reservoir having the water absorbable and permeable material disposed therein, thus the dry and cold oxygen/air shall be channeled to the first gas passage within the housing of the humidifier and conveyed to the oxygen/air inlet of the fuel cell, and high-temperature and high-moisture exhaust gas discharged from the fuel cell is introduced to the second gas passage within the housing of the humidifier, such that water and heat of the exhaust gas in the second g