In order to adjust the temperature and humidity of the intake air, and a respiratory moist heat exchanger and a moisture absorption and release material and heat storage carrier material, the density of the heat storage carrier material constituting the respiratory moist heat exchanger surface area, empty porosity, and or physical properties, of the number of cells, the physical properties of one, the breathing for moist heat at least you have the choice of the moisture absorption and release substances that are added to the breathing for moist heat exchanger, from the physical properties of the ability Hygroscopic addition and density respiratory moist heat exchanger is provided at a gradient along the flow direction of the respiratory gases through the exchanger. [Selection Figure Figure 3吸気の温度と湿度を調整するために、蓄熱担体素材と吸放湿性物質とを有する呼吸用湿熱交換体であって、前記呼吸用湿熱交換体を構成する前記蓄熱担体素材の密度、表面積、空孔率、及びセル数の物性、あるいは、前記呼吸用湿熱交換体に添加される前記吸放湿性物質の、添加密度及び吸放湿能力の物性から選択した少なくとも一つの物性について、前記呼吸用湿熱交換体を通過する呼吸気の流れ方向に沿った勾配が設けられている呼吸用湿熱交換体。【選択図】図3
