| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon dioxide absorbing device for a diving unit having a relatively simple structure having high absorbing efficiency of carbon dioxide with the relatively simple structure, having the wide air permeable area and causing no mixing in a respiratory circuit of carbon dioxide absorbent powder generated by friction. SOLUTION: The inside of an outer shell 1 is provided with a porous outer cylinder 2a having the lower end being air impermeable, a porous inner cylinder 2b penetrating through the center of the outer cylinder 2a and an inner shell 2 having a doughnut-shaped structure having a carbon dioxide absorbent 3 loaded in an annular space 25 between the outer cylinder 2a and the inner cylinder 2b, and respiratory gas is made to flow in a centripetal shape to the inner cylinder 2b from a peripheral surface of the outer cylinder 2a. The outer cylinder 2a and the inner cylinder 2b are suitably formed of a porous plastic sintered body.
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