| 摘要 |
PURPOSE:To prevent infiltration of water and dust into a car by displacing and crooking a conduit line in the duct for a car and providing resistant measures such as stepped parts, ribs and the like and further fitting a check valve inside the car so as to attenuate the force of water infiltrated from the outside. CONSTITUTION:Water infiltrating through a slit B1 of a grille B must be changed in the direction along the direction C of a conduit line and the force of water is first attenuated at this point. Water changed in the direction along the inner wall of a horizontal pipe part 2 flows to a connection part 5, where it collides with a rib 52 and a stepped part 51 in succession. This further attenuates the force of water, which now has no such force as to reverse a valve body 42 even if it reaches a check valve 4 subsequently. Further, even if the water infiltrates over the check valve 4, it scarcely has the force, therefore, an upright pipe 3 may be set low. |
