Patent ID: 7717163

Claim:
A heat exchanger comprising: a plurality of fins and an adsorbent capable of adsorbing moisture from the air and desorbing the moisture into the air, wherein the surfaces of the fins are covered with an adsorbent layer containing the adsorbent and a binder for supporting the adsorbent on the surfaces of the fins, the binder is selected so that linear thermal expansion coefficient of a material for the fins is between linear thermal expansion coefficient of the adsorbent and linear thermal expansion coefficient of the binder, linear thermal expansion coefficient of the adsorbent layer is substantially equivalent to linear thermal expansion coefficient of the fins, the adsorbent layer is constituted of a dry solid layer of a water-based emulsion binder mixed with the adsorbent, and a mass ratio between a solid portion of the water-based emulsion binder and the adsorbent is not lower than 1:3 and not higher than 1:8.