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AssigneeValeo Systemes Thermiques
InventorsSébastien Goude, Thibaud Matharan, Charlie Bricault, Renan Leon
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The main subject matter of the invention is a ventilation device including at least one duct intended to channel an air flow in an air flow direction inside the duct, the ventilation device including at least one acoustic attenuation member at least partially arranged around the duct and made up of a network of resonators, each resonator having at least one cavity and one neck connecting the cavity to the duct, the resonators that make up the network of resonators being distributed at least parallel to the air flow direction. A distance separating two necks varies along a direction parallel to the air flow direction and in that a volume of the cavities varies along the direction parallel to the air flow direction.
A ventilation device comprising at least one duct intended to channel a stream of air along an air flow direction in the at least one duct, the at least one duct including two longitudinal walls and two vertical walls, at least one acoustic attenuation system disposed at least in part around the at least one duct and made up of a network of resonators extending along at least three walls of the two longitudinal walls and two vertical walls of the at least one duct, each resonator including at least one cavity and one neck connecting the at least one cavity to the at least one duct, the resonators of the network of resonators being distributed at least parallel to the air flow direction, wherein a distance separating necks of a pair of subsequent resonators of the network of resonators varies along a direction parallel to the air flow direction compared to a distance separating necks of another pair of subsequent resonators of the network of resonators, wherein a volume of at least two cavities varies along the direction parallel to the air flow direction.
A heating, ventilation and/or air-conditioning installation for a motor vehicle, comprising a ventilation device including at least one duct intended to channel a stream of air along an air flow direction in the at least one duct, the at least one duct including two longitudinal walls and two vertical walls, at least one acoustic attenuation system disposed at least in part around the at least one duct and made up of a network of resonators extending along at least three walls of the two longitudinal walls and two vertical walls of the at least one duct, each resonator including at least one cavity and one neck connecting the at least one cavity to the at least one duct, the resonators of the network of resonators being distributed at least parallel to the air flow direction, wherein a distance separating necks of a pair of subsequent resonators of the network of resonators varies along a direction parallel to the air flow direction compared to a distance separating necks of another pair of subsequent resonators of the network of resonators, wherein a volume of at least two cavities varies along the direction parallel to the air flow direction.
A ventilation device comprising at least one duct intended to channel a stream of air along an air flow direction in at least one duct, the at least one duct including two longitudinal walls and two vertical walls, at least one acoustic attenuation system disposed at least in part around the at least one duct and made up of a network of resonators extending along at least three walls of the two longitudinal walls and two vertical walls of the at least one duct, each resonator including at least one cavity and one neck connecting the at least one cavity to the at least one duct, the resonators of the network of resonators being distributed at least parallel to the air flow direction, wherein a distance separating necks of a pair of subsequent resonators of the network of resonators varies along a direction parallel to the air flow direction compared to a distance separating necks of another pair of subsequent resonators of the network of resonators, wherein a volume of at least two necks varies along the direction parallel to the air flow direction.
Dependencies are inferred from the claim text.