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US 12,587,058 B2Granted
Rotary machine with refrigerant flow path
OwnerKai Iijima, Yuji Sasaki +1inventors
InventorsKai Iijima, Yuji Sasaki, Hikaru Sugiura
Life of this patent
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Abstract
A rotary machine includes an electric motor including a rotor and a stator, a rotating shaft to be rotated driving the electric motor, an impeller attached to the rotating shaft, an inner case surrounding the stator and to which the stator is fixed, and an outer portion externally mounted on the inner case. The outer portion includes an inner circumferential surface facing an outer circumferential surface of the inner case, and a flow path groove formed on the inner circumferential surface and through which a refrigerant passes.
Claims14
A rotary machine comprising:
- an electric motor including a rotor and a stator;
- a rotating shaft to be rotated by driving the electric motor;
- an impeller attached to the rotating shaft;
- an inner case surrounding the stator and to which the stator is fixed, and the inner case including a bottom wall located between the impeller and the stator, a flange portion having a circumferential end that extends outwardly from the inner case in a radial direction of the rotating shaft, and an inner open end surrounded by the flange portion;
- an outer housing externally mounted on the inner case, wherein the outer housing includes:
- an inner circumferential surface comprising a first surface facing an outer circumferential surface of the inner case, and a second surface extending from the first surface beyond the inner case in an axial direction of the rotating shaft, the second surface partially facing the flange portion;
- a back wall facing the bottom wall of the inner case in the axial direction of the rotating shaft, and located between the impeller and the bottom wall of the inner case;
- a stepped portion extending away from the first surface in the radial direction and located between the first surface and the second surface;
- and
- a flow path groove formed on the first surface of the outer housing to transmit a refrigerant, the flow path groove including an opening formed at the stepped portion, wherein the flange portion of the inner case abuts the stepped portion in the axial direction to block the opening;
- a seal located between and in contact with both the circumferential end of the flange portion and the second surface of the outer housing in the radial direction to prevent leakage of the refrigerant from the opening;
- and
- an inner lid that covers the inner open end of the inner case, the inner lid contacting the second surface of the outer housing in the radial direction,
- wherein the outer housing includes a back groove formed on the back wall, facing the bottom wall, and communicating with the flow path groove, wherein the flow path groove extends from the back groove in the axial direction, and
- wherein the flow path groove includes a plurality of main grooves arranged side by side in a circumferential direction of the inner case and extending from the back groove in the axial direction, the plurality of main grooves communicating with each other via the back groove.
12 more elements
A rotary machine comprising:
- an electric motor including a rotor and a stator;
- a rotating shaft to be rotated by driving the electric motor;
- an impeller attached to the rotating shaft;
- an inner case surrounding the stator and to which the stator is fixed, and the inner case including a bottom wall located between the impeller and the stator, a flange portion having a circumferential end that extends outwardly from the inner case in a radial direction of the rotating shaft, and an inner open end surrounded by the flange portion;
- an outer housing externally mounted on the inner case, wherein the outer housing includes:
- an inner circumferential surface comprising a first surface facing an outer circumferential surface of the inner case, and a second surface extending from the first surface beyond the inner case in an axial direction of the rotating shaft, the second surface partially facing the flange portion;
- a back wall facing the bottom wall of the inner case in the axial direction of the rotating shaft, and located between the impeller and the bottom wall of the inner case;
- a stepped portion extending away from the first surface in the radial direction and located between the first surface and the second surface;
- and
- a flow path groove formed on the first surface of the outer housing to transmit a refrigerant, the flow path groove including an opening formed at the stepped portion, wherein the flange portion of the inner case abuts the stepped portion in the axial direction to block the opening;
- a seal located between and in contact with both the circumferential end of the flange portion and the second surface of the outer housing in the radial direction to prevent leakage of the refrigerant from the opening;
- and
- an inner lid that covers the inner open end of the inner case, the inner lid contacting the second surface of the outer housing in the radial direction,
- wherein the outer housing includes a back groove formed on the back wall, facing the bottom wall, and communicating with the flow path groove,
- wherein the flow path groove extends from the back groove in the axial direction,
- wherein the flow path groove includes an inlet configured to receive the refrigerant and an outlet configured to discharge the refrigerant,
- wherein the flow path groove and the back groove form a one-pass channel connecting the inlet to the outlet,
- wherein the inlet is located closer to the bottom wall than to the flange portion, and
- wherein the outlet is located closer to the flange portion than to the bottom wall.
16 more elements
Dependencies are inferred from the claim text.