PROBLEM TO BE SOLVED: To provide a mist sauna device without generating pressure rise in a water supply pipeline of mist water, wherein drainage is unnecessary, furthermore, to detect the presence or absence of leak regardless of leaking sites in a liquid-liquid heat exchanger.SOLUTION: This mist sauna device has a return hot-water thermistor THM for detecting a return hot-water temperature from a primary side of a liquid-liquid heat exchanger 7 and a leak determination means for determining the presence of absence of leak between the primary and secondary side of the liquid-liquid heat exchanger 7 by the detected temperature with the return hot-water thermistor THM during mist spraying, and the leak determination means determines the leak presence between the primary and secondary side of the liquid-liquid heat exchanger 7 in a case that the detected temperature by the return hot-water thermistor THM during mist spraying is lower than the predetermined temperature, and the mist sauna device has a safety device which stops the operation of the device according to the determination result of the leak presence.COPYRIGHT: (C)2012,JPO&INPIT【課題】ミスト用水の給水管路内部に圧力上昇が生じず、しかも排水が不用となり、さらに液-液熱交換器中のリーク発生箇所に関らずリークの有無を検出すること。【解決手段】液-液熱交換器7の一次側からの温水戻り温度を検出する戻り温水サーミスタTHMと、ミスト噴霧時に戻り温水サーミスタTHMによる検出温度により液-液熱交換器7の一次側と二次側との間のリークの有無の判定を行うリーク判定手段とを備え、リーク判定手段は、ミスト噴霧時に戻り温水サーミスタTHMによる検出温度が所定温度より低い場合は液-液熱交換器7の一次側と二次側との間にリーク有りと判定し、このリーク有りの判定結果に応じて機器の運転を停止させる安全装置を備えたミストサウナ装置である。【選択図】図1
