| 摘要 |
PROBLEM TO BE SOLVED: To protect parts in a device by installing valves at the corner section of the specific first surface of a box body and a corner section places in the diagonal direction of the corner section of the first surface on a second surface on the opposed reverse side respectively and inclining each of the adjacent inwalls of the box body towards the valves in these valves. SOLUTION: In a box body 1, valve mounting sections 2, 3 are set up at the corner section of the specific first surface of the box body 1 and the corner section of a second surface on the reverse side oppositely facing the corner section of the first surface respectively, and recessed sections are formed to these valve mounting sections 2, 3 so that water is collected. The six inwalls 6 of the box body 1 are tilted towards the adjacent valve mounting sections 2 or 3 respectively. Electrically driven valves 4, 5 are fitted on each valve mounting section 2, 3 respectively, these electrically driven valves 4, 5 are opened automatically by a control circuit in the box body 1 and a controller on the outside periodically, and the electrically driven valve 4 is worked as a suction valve and the electrically driven valve 5 as a drain valve respectively.
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