| 摘要 |
PURPOSE: An odor countercurrent preventing device is provided to prevent the backflow of odor and the inflow of foreign materials under construction. CONSTITUTION: An odor countercurrent preventing device comprises an outer case(110) and an inner case(120). The top of the outer case is opened and comprises an inner case latching protrusion(111), a water outlet(112) and two inner walls(113). The two inner walls are extended inward from the water outlet to partition inside thereof and are formed in parallel. The inner case is coupled to the inside of the outer case and the top of the inner case is opened. The inner case comprises a through-hole(121) and two branch pipes(122) having same entrance.
|
