Patent ID: 7704305

Claim:
A heat exchange module of a sorptive type, characterized in that a moisture absorptive layer is formed on a metal surface having excellent heat conductivity, and characterized further in that the moisture absorptive layer has (a) a sorptive agent of an organic polymer type in the form of fine particles comprising organic polymer having hydrophilic polar group and cross-linking structure in a molecule is an essential component, (b) saturated moisture absorbing rates at 20° C. and 65% RH and 90% RH which are not less than 20% by weight and not less than 40% by weight, respectively, and the difference in the saturated moisture absorbing rates under such a condition is not less than 20% by weight, and (c) a porous structure which has a specific surface area of not less than 1 m 2 /g and an average pore diameter of 0.005 to 5.0 μm.