Sound deadening baffle for a ventilation valve
View Patent ↗A baffle ( 10 ) for a venting valve for reducing the admission of sound into the interior in particular of a motor vehicle, including at least one air guiding channel ( 16, 18, 20, 22 ) having a labyrinth geometry.
1. A baffle ( 10 ) for a venting valve for reducing the sound admission into the interior of a motor vehicle, including at least one air guiding channel ( 16 , 18 , 20 , 22 ) having a labyrinth geometry, the air guiding channel having an inlet side and an outlet side and guiding air from an interior of the motor vehicle to an exterior of the motor vehicle, the inlet side being in fluid communication with the interior of the motor vehicle and the outlet side being in fluid communication with the exterior of the motor vehicle, the air guiding channel having a longitudinal axis extending from the inlet side of the air guiding channel to the outlet side of the air guiding channel,
two rigid reflection walls being arranged in the at least one air guiding channel, the two rigid reflection walls extending perpendicular to the longitudinal axis of the at least one air guiding channel and permitting air to travel from the inlet side to the outlet side at all times,
a first of the two rigid reflection walls being arranged at the inlet side, and a second of the two rigid reflection walls being arranged approximately midway between the inlet side and the outlet side.
2. The baffle ( 10 ) according to claim 1 , wherein one of the rigid reflection walls ( 40 , 42 ) is realized by an extension formed in one piece with a bottom of the at least one air guiding channel.
3. The baffle ( 10 ) according to claim 1 , wherein the at least one air guiding channel ( 16 , 18 , 20 , 22 ) has a roof-like shape extending in a slanted manner.
4. The baffle ( 10 ) according to claim 3 , wherein a bottom of the at least one air guiding channel ( 16 , 18 , 20 , 22 ) extends from an inlet side first so as to be ascending and then descending.
5. The baffle ( 10 ) according to claim 4 , wherein a vertex of the bottom ( 26 , 28 , 30 , 32 ) is arranged at least at the level of an upper edge of the outlet-side end of the at least one air guiding channel.
6. The baffle ( 10 ) according to claim 1 , wherein the at least one air guiding channel ( 16 , 18 , 20 , 22 ) has a bottom configured such that penetrating water is guided to the outside.
7. The baffle ( 10 ) according to claim 1 , wherein it is provided with mounting means ( 46 ) for the attachment to a venting valve.
8. An assembly including a venting valve ( 50 ) and a baffle ( 10 ) according to claim 1 , wherein the bottom ( 26 , 28 , 30 , 32 ) of the at least one air guiding channel ( 16 , 18 , 20 , 22 ) is inclined such that penetrating water is guided to the inlet side of the baffle ( 10 ) and out of the latter.
9. An assembly including a venting valve ( 50 ) and a baffle according to claim 1 , wherein the bottom ( 26 , 28 , 30 , 32 ) of the at least one air guiding channel is inclined such that water having reached the baffle ( 10 ) through the venting valve ( 50 ) is guided back to the venting valve ( 50 ) so that it is conducted away through the latter.
10. The assembly according to claim 8 , wherein the baffle ( 10 ) is releasably mounted to the venting valve ( 50 ).
11. A baffle ( 10 ) for a venting valve for reducing the sound admission into the interior in particular of a motor vehicle, including at least two air guiding channels ( 16 , 18 , 20 , 22 ) having a labyrinth geometry and being arranged adjacent to each other, the air guiding channels having an inlet side and an outlet side and guiding air from an interior of the motor vehicle to an exterior of the motor vehicle, the inlet side being in fluid communication with the interior of the motor vehicle and the outlet side being in fluid communication with the exterior of the motor vehicle, the air guiding channels having a longitudinal axis extending from the inlet side of the air guiding channels to the outlet side of the air guiding channels,
two rigid reflection walls being arranged in each of the air guiding channels permitting air to travel from the inlet side to the outlet side at all times at least one of the two rigid reflection walls being arranged approximately midway between the inlet side and the outlet side, and
an intermediate wall being provided between the two air guiding channels extending parallel to the longitudinal axis, the two rigid reflection walls extending from the intermediate wall.
12. The baffle according to claim 11 , wherein the two rigid reflection walls each have a connected edge and a free edge, each rigid reflection wall being fixed to the intermediate wall at its connected edge and the connected edges of the two rigid reflection walls being arranged at the intermediate wall spaced along the longitudinal axis.
13. The baffle according to claim 11 , wherein the two rigid reflection walls extend on opposite sides of the intermediate wall, the first rigid reflection wall extending into a first of the at least two air guiding channels and the second rigid reflection wall extending into a second of the at least two air guiding channels.
14. The baffle according to claim 11 , wherein the two rigid reflection walls extend perpendicular to the longitudinal axis.