US Patent 10542635 Electronic apparatus and dummy device

An electronic apparatus includes a liquid immersion tank that stores a refrigerant and has a plurality of slots therein, an electronic device stored in one slot of the plurality of slots and a dummy device stored in another slot of the plurality of slots, formed in a hollow shape, the dummy device having a ceiling portion and a bottom portion, the ceiling portion having a first hole and an opening and closing portion to open and close the first hole, and the bottom portion being open, and a fixing portion that fixes the dummy device to the liquid immersion tank.