| 摘要 |
A humidity controller arranged within a casing of an HDD includes a container housing a moisture absorbing agent, an air communication port that permits communication between the inner space of the casing and the inner space of the container, and an opening-closing control section configured to open-close the air communication port in accordance with the humidity inside the casing. The opening-closing control section is arranged in the container and includes a humidity sensitive member that is elongated or shrunk in accordance with the humidity to open-close the air communication port.
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