| 主权项 |
1. An oxygen concentrator comprising:
an inlet opening configured to receive air, the inlet opening formed in a wall of the oxygen concentrator; a compressor configured to pressurize the air received through the inlet opening; an inlet opening restrictor configured to dynamically change a characteristic of the inlet opening responsive to increased or decreased demand for the pressurized air by a subject, the inlet opening restrictor comprising a connection portion coupled with the wall and an opposing restriction portion that is free, the restriction being configured to move between a relaxed position and an open position, the restriction portion configured to block airflow through the inlet opening responsive to being in the relaxed position and permit airflow through the inlet opening responsive to being in the open position, the restriction portion being held in the open position by the airflow through the inlet opening; and a sieve bed configured to separate the pressurized air into a concentrated gas component for delivery to the subject. |
