PROBLEM TO BE SOLVED: To provide a carbon dioxide microbubble generating unit which can obtain an effect of a carbon dioxide bath at a low cost by using a bubble generating solid agent, and is excellent in the persistence of the effect by atomization of generated carbon dioxide bubbles.SOLUTION: Since carbon dioxide gas is generated by a bubble generating solid agent 50, an effect of carbon dioxide warm water can be obtained easily at a low cost in comparison with a configuration using a carbon dioxide gas cylinder. A bubble atomization mechanism 1, which receives warm water together with the carbon dioxide gas generated by the bubble generating solid agent 50 to atomize the carbon dioxide gas and sends the warm water containing the carbon dioxide microbubbles, which are the atomized carbon dioxide bubbles, to a warm water discharge port, is arranged in the middle of a warm water flow passage 201b and on the downstream side of a bubble generating solid agent storage part 50R. Since the carbon dioxide bubbles discharged from the warm water discharge port are atomized to suppress a rising rate of the bubbles, the dissolution efficiency of the carbon dioxide gas is increased and the carbon dioxide gas is gradually dissolved from the bubbles into the warm water, whereby the persistence of a carbon dioxide gas effect can be improved.COPYRIGHT: (C)2014,JPO&INPIT【課題】 固形発泡剤の利用により炭酸ガス浴の効果を安価に享受でき、かつ、発生させる炭酸ガス気泡の微細化により、その効果の持続性にも優れた炭酸ガス微細気泡発生ユニットを提供する。【解決手段】 固形発泡剤50により炭酸ガスを発生させるので、炭酸ガスボンベを用いる構成よりも安価で手軽に炭酸ガス温水の効果を享受できる。また、固形発泡剤収容部50Rよりも下流にて温水流通経路201bの途上に、固形発泡剤50が発生する炭酸ガス気泡とともに温水を受け入れて炭酸ガス気泡を微細化し、その微細化された炭酸ガス気泡である炭酸ガス微細気泡を含んだ温水を温水吐出口に向けて送出する気泡微細化機構1を配置した。温水吐出口から吐出される炭酸ガス気泡が微細化され、気泡の浮上速度が抑制されるので、炭酸ガスの溶解効率が高まるとともに、気泡から温水中に炭酸ガスが徐々に溶け出す結果、炭酸ガス効果の持続性を高めることができる。【選択図】 図1B
