| 摘要 |
PROBLEM TO BE SOLVED: To mitigate the temperature drop of bubbles by air expansion before the bubbles are brought into contact with the human body during flotation so that no cold air or no uncomfortableness is given to the human body when the air bubbles are generated from the exhaust nozzle of a nozzle pipe fitted in a bubble bathtub. SOLUTION: A space 3 is provided on the nozzle pipe 2, the air bubbles 16 discharged from the exhaust nozzle 15 of the nozzle pipe 2 exchange heat with the hot water 13 in the space 3, thus the air bubbles 16 are warmed.
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