| 摘要 |
PROBLEM TO BE SOLVED: To improve the thermal efficiency of a system even when forming heated air for sauna while contacting air with warm water downward flowing on a heat exchange promoting medium. SOLUTION: Inside a closed space V1 on one end side of a bathtub 2 in lengthwise direction, a duct 10 is installed for forming heated air L while contacting air K sucked from a suction part 11a on one end side into the internal part with warm water J downward flowing along with the external face of a heat exchange promoting medium 22 and a discharge part 12a for the heated air L on this duct 10 is connected to a discharge opening part 60 formed on an apron 3. Besides, inside the duct 10, a liquid pool 110 is provided for recovering the warm water J downward flowing along with the heat exchange promoting medium 22 and on the side of the discharge part 12a on the duct 10, an air heater 40 is provided for heating the heated air L with the warm water J before being supplied to the heat exchange promoting medium 22. Then, the apron 3 is provided with an intake opening part for the air K. |
