US 12,352,202 B2
Electric turbocharger with cooling flow path
Koji Sakota, Tokyo (JP); Yuji Sasaki, Tokyo (JP); and Shun Nakayama, Tokyo (JP)
Filed by IHI Corporation, Tokyo (JP)
Filed on Feb. 21, 2023, as Appl. No. 18/171,659.
Application 18/171,659 is a continuation of application No. PCT/JP2021/029182, filed on Aug. 5, 2021.
Claims priority of application No. 2020-140746 (JP), filed on Aug. 24, 2020.
Prior Publication US 2023/0279873 A1, Sep. 7, 2023
Int. Cl. F02B 39/00 (2006.01); F02B 39/10 (2006.01); F02B 39/16 (2006.01); F04D 17/10 (2006.01); F04D 25/06 (2006.01); F04D 25/08 (2006.01); F04D 29/28 (2006.01); F04D 29/44 (2006.01); F04D 29/58 (2006.01); H02K 9/22 (2006.01)
CPC F02B 39/005 (2013.01) [F02B 39/10 (2013.01); F04D 29/284 (2013.01); F04D 29/441 (2013.01); H02K 9/227 (2021.01); F02B 2039/164 (2013.01); F04D 17/10 (2013.01); F04D 25/0606 (2013.01); F04D 25/082 (2013.01); F04D 29/5806 (2013.01); F04D 29/5853 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electric turbocharger comprising:
a motor including a stator having a substantially cylindrical shape;
an impeller that is rotatable via the motor;
a compressor casing that accommodates the impeller, and that forms a scroll flow path surrounding the impeller; and
a diffuser plate having a disk shape that includes a first plate member forming a first surface that is thermally coupled to an end surface of the stator, to transfer heat from the stator to the diffuser plate, and a second plate member forming a second surface that is opposite the first surface,
wherein a thermal conductivity of the first plate member is different from a thermal conductivity of the second plate member,
wherein the diffuser plate has a cooling flow path;
wherein a diffuser flow path is formed between the second surface and the compressor casing to guide a fluid discharged from the impeller to the scroll flow path,
wherein the diffuser plate forms an inlet hole for the cooling flow path and an outlet hole for the cooling flow path, that are located radially outwardly relative to an outer circumferential wall of the stator, and
wherein the cooling flow path includes an annular portion that is fluidly coupled between the inlet hole and the outlet hole of the diffuser plate to direct a cooling medium from the inlet hole to the outlet hole via the annular portion.