| 摘要 |
<p>A drain valve device for use with a floor drain structure includes a base (20) and a control unit (40, S, 50) removably disposed in the base (20). The control unit (40, S, 50) includes a valve (40) and a resilient component (S) positioned between the valve (40) and the base(20). The drain valve device opens automatically as soon as water entering the base exceeds a predetermined level. The drain valve device shuts automatically as soon as water entering the base is less than a predetermined level. The drain valve device has advantages, namely simple structure, convenient of use, prevention of intrusion of odor and pests, easy to clean, and unlikely to get clogged.</p> |
