| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen condenser that helps easily confirm that attachment and detachment of a humidifier of a user are appropriately carried out. SOLUTION: In the oxygen condenser having an oxygen condensing means separating oxygen from air, an oxygen supplying means supplying oxygen- enriched gas separated by the oxygen condensing means to a user, and a humidifier that can be easily attached to and detached from the halfway point to the oxygen condensing means and the oxygen supplying means, a flow indication means is provided in pipings on the upstream side and the downstream side of the humidifying means.
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