| 摘要 |
PURPOSE: A sink drain is provided to prevent bacteria reproduction and fur by removing the probability of water stagnation in the drain. CONSTITUTION: A sink drain comprises a check valve set for draining water and preventing the backflow of smell. The check valve set comprises a check valve support which is fixed to an inner assembly protrusion(7d) of a drain(7), a circular check valve, a spring, a leg, and a spring support. The check valve let the water flow while preventing the backflow of smell. The spring transfers the check valve up and down. |
