# US 12,191,231 B2 · Rotary machine with electric motor and impeller > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,231 B2 - Document ID: US12191231B2 - Status: Granted - Kind: B2 - Application number: 18/064,932 - Filed: 2022-12-13 - Published: 2023-04-13 - Granted: 2025-01-07 - Earliest claimed: 2020-09-03 - Applicants: IHI Corporation - Inventors: Shun Nakayama; Yuji Sasaki - Web page: https://patentgrep.com/patent/US12191231B2 ## CPC - F04D 17/10: for compressing or evacuating - H10W 40/43: by flowing gases, e.g. forced air cooling - F04D 25/024: {the driving means being assisted by a power recovery turbine} - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - F04D 25/0606: {the electric motor being specially adapted for integration in the pump} - F04D 29/5806: {Cooling the drive system} - F04D 29/5813: {Cooling the control unit} - F04C 18/0207: {both members having co-operating elements in spiral form} - F05B 2210/12: gaseous, i.e. compressible - F05D 2220/40: in turbochargers - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A rotary machine includes an electric motor, an impeller to be rotated by driving the electric motor and suck in and compress a gas, and a housing that houses the impeller and includes a suction port for the gas. The rotary machine further includes heat dissipation fins provided on the housing and disposed to be heat-exchangeable with the gas passing through the suction port, and an inverter connected to the housing and that controls the electric motor. ## Claims ### Claim 1 A rotary machine comprising: an electric motor; an impeller to be rotated by driving the electric motor in order to suck in and compress a gas; a housing that houses the impeller and includes a suction port for the gas; heat dissipation fins provided on the housing and disposed to be heat-exchangeable with the gas passing through the suction port; and an inverter connected to the housing and that controls the electric motor, wherein the inverter is annular and surrounds the suction port. ### Claim 2 (depends on 1) The rotary machine according to claim 1, wherein the heat dissipation fins protrude from an inner circumferential surface of the suction port and are disposed in a flow path for the gas. ### Claim 3 (depends on 2) The rotary machine according to claim 2, wherein the heat dissipation fins extend along a rotation axis of the impeller. ### Claim 4 (depends on 3) The rotary machine according to claim 3, wherein lengths of the heat dissipation fins along the rotation axis are longer than heights of the heat dissipation fins protruding from the inner circumferential surface. ### Claim 5 (depends on 4) The rotary machine according to claim 4, wherein the housing comprises a heat sink forming the suction port, and wherein the inverter abuts the heat sink. ### Claim 6 (depends on 5) The rotary machine according to claim 5, wherein the heat sink includes a pipeline portion forming the suction port, and a flange portion protruding outward from the pipeline portion, and wherein the inverter is connected to the heat sink while abutting the flange portion. ### Claim 7 (depends on 6) The rotary machine according to claim 6, wherein the inverter is annular and surrounds the pipeline portion. ### Claim 8 (depends on 6) The rotary machine according to any one of claim 6, wherein the heat sink includes a pipeline portion forming the suction port, wherein the inverter abuts an outer circumferential surface of the pipeline portion connected to the heat sink, and wherein the heat dissipation fins protrude from an inner circumferential surface of the pipeline portion. ### Claim 9 (depends on 8) The rotary machine according to claim 8, wherein the heat dissipation fins are disposed at uniformly spaced intervals in a circumferential direction around a rotation axis of the impeller. ### Claim 10 (depends on 4) The rotary machine according to claim 4, wherein the housing comprises a heat sink forming the suction port, wherein the heat sink includes an inner tube portion forming the suction port and an outer tube portion provided on an outer side of the inner tube portion, and wherein the heat dissipation fins are disposed between the inner tube portion and the outer tube portion and are connected to the inner tube portion in a heat-exchangeable manner. ### Claim 11 A rotary machine comprising: an electric motor; an impeller to be rotated by driving the electric motor in order to suck in and compress a gas; an impeller casing that houses the impeller; a tubular portion connected to the impeller casing to form a suction port for the gas; an annular shaped inverter that controls the electric motor; and a heat dissipation fin that protrudes from an inner circumferential surface of the tubular portion and is disposed in a flow path for the gas, wherein the inverter is located on an outer circumferential surface of the tubular portion opposite to the heat dissipation fin, so that the inverter surrounds the tubular portion. ### Claim 12 (depends on 11) The rotary machine according to claim 11, further comprising a flange portion that protrudes outward from the tubular portion, wherein the inverter abuts the flange portion. ### Claim 13 (depends on 11) The rotary machine according to claim 11, further comprising an internal flow path located between the impeller and the heat dissipation fin, and having an inner diameter that increases in a tapered manner from the impeller to the heat dissipation fin. ### Claim 14 A rotary machine comprising: an electric motor; an impeller to be rotated by driving the electric motor; an impeller casing that houses the impeller and includes an internal flow path; a suction port fluidly coupled with the internal flow path; an annular shaped inverter that controls the electric motor and surrounds the suction port; and a heat dissipation fin located in the suction port to be heat-exchangeable with a gas passing through the internal flow path. ### Claim 15 (depends on 14) The rotary machine according to claim 14, wherein the internal flow path is located between the heat dissipation fin and the impeller. ### Claim 16 (depends on 15) The rotary machine according to claim 15, wherein the internal flow path has an inner diameter that gradually decreases from the dissipation fin to the impeller. ### Claim 17 (depends on 14) The rotary machine according to claim 14, wherein the impeller casing comprises a diffuser located around the impeller and a scroll fluidly coupled with the diffuser, and wherein the diffuser is fluidly coupled with the internal flow path via the impeller. ### Claim 18 (depends on 17) The rotary machine according to claim 17, further comprising a discharge port fluidly coupled with the scroll and configured to discharge the gas which is compressed with the diffuser and passes through the scroll.