# US 12,006,943 B2 · Waterproof fan > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,943 B2 - Document ID: US12006943B2 - Status: Granted - Kind: B2 - Application number: 17/732,604 - Filed: 2022-04-29 - Published: 2022-11-17 - Granted: 2024-06-11 - Earliest claimed: 2021-05-14 - Assignees: Sanyo Denki Co., Ltd. - Applicants: Sanyo Denki Co., Ltd. - Inventors: Munenori Takakuwa; Hyukjun Kwon - Web page: https://patentgrep.com/patent/US12006943B2 ## CPC - F04D 25/0693: {Details or arrangements of the wiring} - F04D 19/002: {Axial flow fans} - F04D 25/0613: {the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator} - F04D 25/0633: {Details of the magnetic circuit} - F04D 25/0646: {Details of the stator} - F04D 29/023: {especially adapted for elastic fluid pumps} - F04D 29/083: {especially adapted for elastic fluid pumps} - F04D 29/522: {especially adapted for elastic fluid pumps} - H02K 1/187: {to inner stators} - H02K 3/44: Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas - H02K 3/522: {for generally annular cores with salient poles} - H02K 5/08: Insulating casings - H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers - H02K 5/163: {radially supporting the rotary shaft at only one end of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 7/085: {radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence)} - H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) - H02K 21/22: with magnets rotating around the armatures, e.g. flywheel magnetos - H02K 2203/03: Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations - H02K 2211/03: Machines characterised by circuit boards, e.g. pcb - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A waterproof fan includes: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space. ## Claims ### Claim 1 A waterproof fan comprising: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space, wherein the housing space includes a bottom surface on another side of the rotation axis, the positioning member includes: a base portion in contact with the bottom surface of the housing space; and a protruding portion extending from the base portion toward the one side of the rotation axis, and the protruding portion is in contact with the circuit board. ### Claim 2 (depends on 1) The waterproof fan according to claim 1, wherein the positioning member includes a resin different from a resin included in the waterproofing resin portion. ### Claim 3 (depends on 1) The waterproof fan according to claim 1, wherein a fitting portion provided on the positioning member fits in a fitted portion provided in an outer edge of the circuit board, and therefore the positioning member positions the circuit board. ### Claim 4 A waterproof fan comprising: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space, wherein the rotor includes a rotating shaft portion supported by a bearing, the frame includes: an inner cylinder portion supporting the bearing; an outer cylinder portion having a larger diameter than the inner cylinder portion, and a bottom portion connecting the inner and outer cylinder portions on another side of the rotation axis and forming a bottom surface of the housing space, the outer cylinder portion extends from an end in the radial direction of the bottom portion toward the one side of the rotation axis, and the housing space is formed by an outer peripheral surface of the inner cylinder portion, a surface of the bottom portion on the one side of the rotation axis, and an inner peripheral surface of the outer cylinder portion. ### Claim 5 (depends on 4) The waterproof fan according to claim 4, wherein the inner cylinder portion includes: a small-diameter portion inserted through the stator; and a large-diameter portion having a larger diameter than the small-diameter portion and being located on the other side of the rotation axis relative to the small-diameter portion, and the circuit board is positioned in a direction of the rotation axis by a step portion between the small-diameter portion and the large-diameter portion, and positioned in a peripheral direction of the rotation axis by the positioning member.