Rotary electric machine housing and manufacturing method thereof
A rotary electric machine housing accommodates a rotary electric machine. The rotary electric machine housing has a body portion, a gas flow path through which a gas flows, an oil flow path through which an oil flows, and a refrigerant flow path through which a refrigerant flows inside. The refrigerant flow path includes a rotary electric machine heat exchange part in which the refrigerant exchanges heat with the rotary electric machine, a gas heat exchange part in which the refrigerant exchanges heat with the gas flowing through the gas flow path, and an oil heat exchange part in which the refrigerant exchanges heat with the oil flowing through the oil flow path. The rotary electric machine heat exchange part, the gas heat exchange part, and the oil heat exchange part are provided in series along a flow direction of the refrigerant.
1 . A rotary electric machine housing configured to accommodate a rotary electric machine, the rotary electric machine housing comprising:
a body portion having an accommodation space in which the rotary electric machine is accommodated;
a gas flow path provided in the body portion and through which a gas to be supplied to the rotary electric machine flows;
an oil flow path provided in the body portion and through which an oil to be supplied to the rotary electric machine flows; and
a refrigerant flow path provided in the body portion and through which a refrigerant flows inside,
wherein the refrigerant flow path includes:
a rotary electric machine heat exchange part in which the refrigerant exchanges heat with the rotary electric machine;
a gas heat exchange part in which the refrigerant exchanges heat with the gas flowing through the gas flow path; and
an oil heat exchange part in which the refrigerant exchanges heat with the oil flowing through the oil flow path, and
the rotary electric machine heat exchange part, the gas heat exchange part, and the oil heat exchange part are provided in series along a flow direction of the refrigerant.
2 . The rotary electric machine housing according to claim 1 ,
wherein the rotary electric machine heat exchange part is provided downstream of the gas heat exchange part and the oil heat exchange part in the flow direction of the refrigerant.
3 . The rotary electric machine housing according to claim 1 ,
wherein the gas flow path and the gas heat exchange part of the refrigerant flow path extend in an axial direction of the rotary electric machine, and
a flow direction of the refrigerant flowing through the gas heat exchange part is opposite to a flow direction of the gas flowing through the gas flow path.
4 . The rotary electric machine housing according to claim 1 ,
wherein the oil flow path and the oil heat exchange part of the refrigerant flow path extend in an axial direction of the rotary electric machine, and
a flow direction of the refrigerant flowing through the oil heat exchange part is opposite to a flow direction of the oil flowing through the oil flow path.
5 . The rotary electric machine housing according to claim 1 ,
wherein the rotary electric machine heat exchange part has a cylindrical shape, and
the gas heat exchange part and the oil heat exchange part are disposed radially outward of the rotary electric machine heat exchange part.
6 . The rotary electric machine housing according to claim 5 ,
wherein the body portion includes an outer wall having a cylindrical shape,
the outer wall includes:
a terminal arrangement portion provided with an electric terminal for transmitting and receiving electric power between the rotary electric machine and an external device;
a gas flow path arrangement portion provided with the gas flow path and the gas heat exchange part; and
an oil flow path arrangement portion provided with the oil flow path and the oil heat exchange part, and
the terminal arrangement portion, the gas flow path arrangement portion, and the oil flow path arrangement portion are arranged at intervals of about 120 degrees in a circumferential direction of the body portion.
7 . A manufacturing method of manufacturing the rotary electric machine housing according to claim 1 by additive manufacture, the manufacturing method comprising:
integrally forming the body portion, the gas flow path, the oil flow path, and the refrigerant flow path.
8 . The rotary electric machine housing according to claim 1 ,
wherein each of the gas heat exchange part and the oil heat exchange part partially overlaps the rotary electric machine as viewed from a rotor shaft of the rotary electric machine in a radial direction.
9 . The rotary electric machine housing according to claim 1 ,
wherein the gas is surrounded by the refrigerant.
10 . The rotary electric machine housing according to claim 1 ,
wherein the oil is surrounded by the refrigerant.
11 . The rotary electric machine housing according to claim 1 ,
wherein the gas flow path and the gas heat exchange part are provided between adjacent ribs.