# US 11,078,926 B2 · Blower > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,926 B2 - Document ID: US11078926B2 - Status: Granted - Kind: B2 - Application number: 16/132,525 - Filed: 2018-09-17 - Published: 2019-01-17 - Granted: 2021-08-03 - Earliest claimed: 2014-11-17 - Assignees: Nidec Corporation - Applicants: Nidec Corporation - Inventors: Takuya Teramoto - Web page: https://patentgrep.com/patent/US11078926B2 ## CPC - F04D 29/582: {specially adapted for elastic fluid pumps} - A61M 16/0066: {Blowers or centrifugal pumps} - F04D 17/16: for displacing without appreciable compression - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - F04D 29/056: Bearings - F04D 29/281: {for fans or blowers} - F04D 29/4233: {with volutes extending mainly in axial or radially inward direction} - F04D 29/668: {damping or preventing mechanical vibrations} - H02K 1/185: {to outer stators} - H02K 9/227: {Heat sinks} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A centrifugal blower includes a stator housing. The stator housing includes a radial contact surface which makes contact with a casing in a radial direction, a circumferential contact surface which makes contact with the casing in a circumferential direction, and an axial contact surface which makes contact with the casing in an axial direction. With such configuration, it is possible to reduce the vibration of the blower by increasing a contact area between the casing and the stator housing. Further, the stator housing includes a heat dissipating surface. As a result, it is possible to efficiently dissipate the heat, which is generated from the stator, from the heat dissipating surface of the stator housing to the gas existing within the wind tunnel. ## Claims ### Claim 1 A centrifugal blower, comprising: a casing; an impeller disposed within the casing; and a motor arranged to rotate the impeller about a center axis, wherein the casing includes an intake port opened toward a center of the impeller, an exhaust port positioned radially outward of the impeller and the motor, and a wind tunnel arranged to bring the intake port and the exhaust port into communication with each other and arranged to extend in a ring shape around the motor, the motor includes a shaft disposed along the center axis, a rotor fixed to the impeller through the shaft, a stator disposed radially outward of the rotor and arranged to generate rotating magnetic fields between the stator and the rotor, and a stator housing arranged to hold the stator, the stator housing includes a heat dissipating surface exposed to the wind tunnel, and at least one of a through-holes axially penetrated in a tubular portion of the stator housing, and, the heat dissipating surface includes a cylindrical surface exposed to the wind tunnel over an entire circumference, and surfaces which define each of the through-holes of the stator housing include circumferential contact surfaces and radial contact surfaces, wherein at least one of the circumferential contact surfaces and the radial contact surfaces make contact with a columnar portion of the casing. ### Claim 2 (depends on 1) The blower of claim 1, wherein the stator housing includes an axial contact surface that makes contact with the casing in the axial direction. ### Claim 3 (depends on 1) The blower of claim 1, wherein the casing includes a ring-shaped portion, columnar portions axially extend within the through-holes of the stator housing, and the ring-shaped portion is an annular portion that covers an upper surface of the tubular portion. ### Claim 4 (depends on 1) The blower of claim 1, wherein a material of the stator housing and a material of the casing differ from each other. ### Claim 5 (depends on 1) The blower of claim 1, wherein the material of the stator housing is metal, and the material of the casing is a resin. ### Claim 6 (depends on 5) The blower of claim 5, wherein the material of the stator housing is aluminum or an aluminum alloy. ### Claim 7 (depends on 5) The blower of claim 5, wherein the casing is a resin-molded article that uses the stator housing as an insert part. ### Claim 8 (depends on 1) The blower of claim 1, wherein the stator housing includes a housing body and a ring member positioned radially outward of the housing body, the housing body and the ring member are arranged to make contact with each other, and at least an outer circumferential surface of the ring member becomes the heat dissipating surface. ### Claim 9 (depends on 8) The blower of claim 8, wherein the ring member includes a cylindrical portion disposed radially outward of the housing body so as to axially extend in a cylindrical shape and a flange portion protruding radially outward from the cylindrical portion. ### Claim 10 (depends on 1) The blower of claim 1, further comprising: a plurality of bearings interposed between the stator housing and the shaft, wherein the bearings are disposed at the same side of the rotor in the axial direction. ### Claim 11 (depends on 1) The blower of claim 1, which is configured to be used to feed air to a respiratory tract of a sleeping human.