PROBLEM TO BE SOLVED: To provide a breathing gas heating humidifier with a higher humidification efficiency of a breathing gas, the heating humidifier being capable of operating continuously with a humidification capability kept stably even when supplying the breathing gas at high flow rate.SOLUTION: A chamber 3 of a water breathing gas heating humidifier 100 includes an inlet 41 for taking in a breathing gas in the chamber 3, an outlet 51 for guiding the breathing gas humidified in the chamber 3 to the outside, a water supply port 61 for supplying water in the chamber 3, a heating plate 81 disposed vertically and to be heated by the heater 22, and a first sheet-like humidification member 11A soaked in the water in the chamber 3 to be kept in humid condition. The first sheet-like humidification member 11A is disposed so as to come in surface contact with the heating plate 81 and to allow the breathing gas to circulate along a surface of the heating plate. The water supply port 61 is disposed so as to supply the water toward an upper part of the heating plate 81.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】呼吸用気体の加湿効率を高めることができ、呼吸用気体を高流量で供給した場合においても安定した加湿能力を維持して連続的な運転を行うことができる呼吸用気体の加温加湿器を提供する。【解決手段】水呼吸用気体の加温加湿器100のチャンバ3には、チャンバ3内に呼吸用気体を取り入れる吸入口41と、チャンバ3内で加湿された呼吸用気体を外部に導き出す吹出口51と、チャンバ3内に水を供給する給水口61と、ヒータ22により加熱され上下方向に沿って配置される加熱板81と、チャンバ3内の水に下部を浸漬させて湿潤状態に保たれる第1シート状加湿部材11Aとが備えられ、第1シート状加湿部材11Aは、加熱板81に面接触するとともに、その表面に沿って呼吸用気体を流通させるように配置されており、給水口61は、加熱板81の上部に向けて水を供給するように配置される。【選択図】 図3
