US 12,244,207 B2
Rotating electrical machine
Yuki Tsukagoshi, Kanagawa (JP); and Yasuyuki Kubota, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 18/280,601
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Mar. 8, 2021, PCT No. PCT/JP2021/009083
§ 371(c)(1), (2) Date Sep. 6, 2023,
PCT Pub. No. WO2022/190183, PCT Pub. Date Sep. 15, 2022.
Prior Publication US 2024/0039361 A1, Feb. 1, 2024
Int. Cl. H02K 5/20 (2006.01)
CPC H02K 5/203 (2021.01) 8 Claims
OG exemplary drawing
 
1. A rotating electrical machine comprising:
a cylindrical first housing having a first flow path configured to allow a refrigerant to flow therethrough in one direction, a first inlet configured to allow the refrigerant to flow into the first flow path, and a first outlet configured to allow the refrigerant to flow out of the first flow path, the first flow path extending in a spiral at a circumferential surface of the first housing;
a cylindrical second housing having a second flow path configured to allow the refrigerant to flow therethrough in one direction, a second inlet configured to allow the refrigerant to flow into the second flow path, and a second outlet configured to allow the refrigerant to flow out of the second flow path, the second flow path extending in a spiral at a circumferential surface of the second housing, the second flow path formed in a spiral shape that is wound in a reverse direction with respect to the first flow path; and
a coupling pipe that couples the first outlet and the second inlet and extends linearly from the first outlet to the second inlet, wherein:
a first portion of the first flow path is formed along one end surface of the first housing such that a width along the circumferential surface increases along a flow direction of the refrigerant from the first inlet;
a second portion of the first flow path is formed along an other end surface of the first housing such that a width along the circumferential surface decreases toward the first outlet along the flow direction of the refrigerant;
a third portion of the first flow path connects the first portion and the second portion and has a uniform width;
a width of the third portion is narrower than a width of a widest portion of the first portion and narrower than a width of a widest portion of the second portion; and
the first inlet and the first outlet are separated from each other by 90 degrees or more in a circumferential direction of the first housing.