Silencer for mounting in an air duct
A silencer for installation in an air duct, in particular in a flat duct, having at least one sound-absorbing damping element extending essentially in a longitudinal direction (X), and having at least one holding device which accommodates the damping element at least in sections and has a fastening device for fixing the silencer in the air duct. An assembly comprising an air duct and such a silencer is further described.
1. A silencer for installation in an air duct, in particular in a flat duct, comprising:
at least one sound-absorbing damping element extending essentially in a longitudinal direction (X) of the air duct, and having at least one holding device which accommodates the damping element at least in sections,
wherein the holding device has a fastening device for fixing the silencer in the air duct, and
wherein the holding device has two half-shells that are detachably connected to one another, in particular in a height direction (Z) of the silencer, and between which the damping element is received and fixed at least in sections.
2. The silencer of claim 1 , which comprises at least two damping elements consisting of different sound-absorbing materials which are arranged to damp sound in different frequency ranges.
3. The silencer of claim 1 , wherein the holding device has at least one, in particular spherical or lenticular, thickening arranged on its outer circumference for generating a defined clamping force between the silencer and the air duct.
4. The silencer of claim 1 , wherein the fastening device comprises at least two undercut latching portions projecting in a transverse direction (Y) of the silencer.
5. The silencer of claim 4 , wherein the undercut latching portions are part of at least one guide rail arranged in the longitudinal direction (X) on the outer periphery of the holding device.
6. The silencer of claim 1 , wherein the outer contour of the interconnected half-shells corresponds to the flow cross-section of the air duct.
7. The silencer of claim 1 , wherein the half-shells enclose at least one air passage oriented in the longitudinal direction (X).
8. The silencer of claim 1 , wherein at least one web is formed between the interconnected half-shells, which web traverses the flow cross-section perpendicularly to the longitudinal direction (X) and has an open damping element receptacle facing the damping element in the longitudinal direction (X), in which receptacle the damping element is received at the end face.
9. The silencer of claim 8 , wherein the damping element extends through the flow cross-section in the direction corresponding to the web perpendicular to the longitudinal direction (X).
10. The silencer of claim 8 , wherein the web is disposed in the retainer so as to centrally divide the air passage.
11. The silencer of claim 8 , wherein a retaining means for retaining the damping element is provided in the damping element receptacle.
12. The silencer of claim 11 , wherein the retaining means comprises retaining prongs oriented transversely to the longitudinal direction (X), onto which the damping element is slipped.
13. The silencer ( 401 ) of claim 8 , wherein the silencer receptacle ( 420 ) comprises air guide surfaces ( 410 ) surrounding the silencer element ( 402 ) in the longitudinal direction (X) and laterally shielding the silencer element ( 402 ) from the at least one air passage ( 408 ).
14. The silencer of claim 13 , wherein the air guide surfaces meet on the side of the web facing away from the damping element, tapering the web in the longitudinal direction (X).
15. The silencer of claim 4 , wherein the holding device comprises a plurality of parallel spaced apart webs in which a corresponding plurality of parallel spaced apart damping elements are received.
16. The silencer of claim 8 , wherein the opposing end faces of the at least one damping element are held by two opposing holding devices, wherein the damping element receptacles of the holding devices are aligned facing each other.
17. An assembly of an air duct and a silencer according to claim 1 , wherein the silencer is fixed in the air duct by means of the fastening device ( 404 ).
18. The assembly of claim 17 , wherein the air duct includes fastening devices complementary to the fastening devices of the silencer.