US 12,155,099 B2
Ejector having two-stage nozzle structure
Hyo Sub Shim, Gyeonggi-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Feb. 28, 2022, as Appl. No. 17/682,496.
Claims priority of application No. 10-2021-0082184 (KR), filed on Jun. 24, 2021.
Prior Publication US 2022/0416272 A1, Dec. 29, 2022
Int. Cl. H01M 8/04082 (2016.01); F04F 5/46 (2006.01)
CPC H01M 8/04216 (2013.01) [F04F 5/461 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An ejector having a two-stage nozzle structure installed on a fuel cell recirculation line to supply new hydrogen and a recirculation gas, comprising:
a housing having a first orifice defined therein and an inner space divided into a first space and a second space;
a poppet disposed in the housing and having a second orifice defined therein, wherein the poppet is divided into a first region disposed in the first space and a second region disposed in the second space; and
a damage prevention member disposed on a surface of the poppet to contact an inner surface of the housing, wherein the damage prevention member is disposed on the first region and a diameter of a cross-sectional area of the first region where the damage prevention member is disposed is greater than a diameter of a cross-sectional area of the second region,
wherein the poppet is moved by a pressure of hydrogen supplied to the housing and a space between the poppet and the housing serves as a flow path through which the hydrogen is supplied, wherein a pressure applied to the poppet is increased as an output for supplying the hydrogen is increased, and wherein the damage prevention member is separated from the inner surface of the housing as the pressure applied to the poppet is increased,
wherein the first region is connected to the second region, and is formed in a shape in which a cross-sectional area thereof increases as a distance from the second region increases.