US 12,434,575 B2
Broadband muffler for fuel cell vehicle
Kaizhuan Wang, Shanghai (CN); and Yimin Ni, Shanghai (CN)
Assigned to MANN+HUMMEL FILTER (SHANGHAI) CO., LTD., Shanghai (CN)
Filed by MANN+HUMMEL FILTER (SHANGHAI) CO., LTD., Shanghai (CN)
Filed on Jun. 30, 2023, as Appl. No. 18/344,922.
Application 18/344,922 is a continuation of application No. PCT/CN2021/140711, filed on Dec. 23, 2021.
Claims priority of application No. 202011609137.9 (CN), filed on Dec. 30, 2020.
Prior Publication US 2023/0339335 A1, Oct. 26, 2023
Int. Cl. B60L 50/72 (2019.01); G10K 11/16 (2006.01)
CPC B60L 50/72 (2019.02) [G10K 11/161 (2013.01); B60L 2270/142 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A broadband muffler for a fuel cell vehicle, the broadband muffler comprising:
a first housing;
a second housing connected to the first housing to form a sealed cavity;
an inner cannula disposed in the seal cavity and dividing the sealed cavity into a plurality of chambers, the inner cannula comprising square or rectangular openings through a surface of the inner cannula in a first one of the chambers, the inner cannula comprising round holes through the surface of the inner cannula in a different one of the chambers, the square or rectangular openings and the round holes being for reducing noise;
a water collection tank disposed in the second housing;
a venturi tube connected to an exhaust port of the inner cannula; and
a drainage tube disposed at a center of the venturi tube and connected to the water collection tank.