US 11,898,579 B2
Ejector and fuel cell system including the same
Nobutaka Teshima, Toyota (JP); and Masaaki Matsusue, Mishima (JP)
Assigned to AISAN KOGYO KABUSHIKI KAISHA, Obu (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 17/276,703
Filed by AISAN KOGYO KABUSHIKI KAISHA, Obu (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
PCT Filed Sep. 20, 2019, PCT No. PCT/JP2019/036979
§ 371(c)(1), (2) Date Mar. 16, 2021,
PCT Pub. No. WO2020/071157, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 2018-187940 (JP), filed on Oct. 3, 2018.
Prior Publication US 2022/0025908 A1, Jan. 27, 2022
Int. Cl. F04F 5/46 (2006.01); F04F 5/20 (2006.01); H01M 8/04089 (2016.01); H01M 8/04119 (2016.01); H01M 8/04082 (2016.01)
CPC F04F 5/46 (2013.01) [F04F 5/20 (2013.01); H01M 8/04097 (2013.01); H01M 8/04164 (2013.01); H01M 8/04201 (2013.01); H01M 2250/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An ejector comprising a tubular main body casing, the main body casing including:
a plurality of first supply ports configured to receive supply of a working fluid;
a second supply port configured to receive supply of a target fluid;
a negative pressure generation chamber configured to generate a negative pressure by the working fluid;
a plurality of nozzles respectively provided corresponding to a plurality of the first supply ports and each having a leading end placed in the negative pressure generation chamber to inject the working fluid;
a diffuser in which the working fluid and the target fluid flow, which is communicated with the negative pressure generation chamber; and
a discharge port to discharge the working fluid and the target fluid that have flown in the diffuser to outside,
the ejector being configured such that the negative pressure is generated in the negative pressure generation chamber by the working fluid that is supplied to the respective first supply ports and injected from the respective corresponding nozzles, the target fluid is sucked in the negative pressure generation chamber from the second supply port by the negative pressure, and the target fluid is made to flow with the working fluid to the diffuser to be discharged out of the discharge port, wherein
a plurality of the nozzles include an inner nozzle and at least one outer nozzle provided to enclose the inner nozzle, the inner nozzle and the outer nozzle being arranged to enclose a diffuser axis as an axis of the diffuser so that any one of an axis of the inner nozzle and an axis of the outer nozzle is arranged to be aligned with the diffuser axis,
the inner nozzle is provided with an inner injection hole in which the working fluid flows, an outer injection hole having an annular section in which the working fluid flows is provided between the inner nozzle and the outer nozzle, when the main body casing is horizontally placed so that the diffuser axis extends horizontally, and the outer injection hole including an upper hole portion on an upper side of the diffuser axis and a lower hole portion on a lower side of the diffuser axis is placed such that the inner nozzle and the outer nozzle are eccentrically placed from each other to make the lower hole portion narrower than the upper hole portion.