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    • 5. 发明专利
    • BATHTUB, BATHTUB DEVICE AND METHOD FOR FEEDING GAS TO BATHTUB
    • JP2003093470A
    • 2003-04-02
    • JP2001298122
    • 2001-09-27
    • TOTO LTD
    • NIIHARA NOBORUKOBAYASHI CHIHIROSHONO NOBUHIROOHASHI TAKAHIRO
    • A47K3/00A61H33/02F24H1/00
    • PROBLEM TO BE SOLVED: To provide a bathtub and a method for feeding gas to bathtub water capable of directly delivering and applying a gas component to a body surface while maintaining a high concentration state of the gas component without dissolving the gas component into the water by controlling a dissolution velocity of carbon dioxide and adhering it to the body surface by mixing the gas component of high concentration into flowing water, dispersing it in the bathtub water in a state of a number of fine bubbles and floating the bubbles in the bathtub water for a predetermined time. SOLUTION: In the method for feeding gas into the bathtub, pure gas or mixed gas with concentration of the water soluble gas component dominantly enhanced in comparison with the atmosphere is mixed in the flowing water in a state of fine bubbles without completely dissolving it, and it is delivered into the water filled in the bathtub in a state of a gas-liquid two-phase flow. At least a large portion of the bubbles are retained for a long time in the bathtub, they rise by buoyancy without dissolving and disappearing into the water filled in the bathtub, and they are delivered to a boundary surface with the atmosphere above the bathtub.