| 摘要 |
Provided are an expansion-type silencer (10) including a substantially rectangular parallelepiped-shaped expansion chamber (16) surrounded by six partition walls and having a suction port (20) and an exhaust port (22) which are formed in the partition walls, and an oxygen concentrator using the expansion-type silencer (10). The expansion-type silencer (10) has a rib (24) extending from one of the partition walls of the expansion chamber (16) formed with the exhaust port (22) toward the interior of the expansion chamber (16) while being in contact with both of a pair of parallel partition walls adjacent to the one of partition walls. The rib (24) is formed with an air passage (26) for providing communication between the exhaust port (22) and the expansion chamber (16). |
