Patent application number | Description | Published |
20090081036 | AXIAL FLOW FAN - An axial flow fan according to the present invention comprises an impeller which rotates about a central axis and including a plurality of blades, a hollow member accommodating therein the impeller, a base portion which is arranged at the hollow member and supports the base portion in a rotatable manner, a plurality of inner air guide members each connected to the base portion, and a plurality of outer air guide members each connected to the hollow member. | 03-26-2009 |
20090155104 | CONTRA-ROTATING AXIAL FLOW FAN UNIT - An axial flow fan unit includes an intake side axial flow fan, an exhaust side axial flow fan, and at least one intermediate axial flow fan. Each of the axial flow fans includes an impeller having blades rotatable about a central rotation axis, a motor arranged to rotate the intake side impeller, and a housing having an inner circumferential surface that surrounds the impeller. The rotational direction of the impeller in the intermediate axial flow fan is different from that of the impellers adjacent thereto. | 06-18-2009 |
20090175720 | AXIAL FAN AND FRAME THEREOF - An axial fan includes a motor section, an impeller, a housing, and a plurality of supporting ribs. The motor section and the impeller are disposed on the inside of the housing. In a connecting region between an inner end portion of the supporting rib and the base section, a first corner portion and a second corner portion are formed on the side of a rotational direction of the impeller and on the side opposite to the rotational direction, respectively. A curvature radius of the first corner portion is larger than a curvature radius of the second corner portion. | 07-09-2009 |
20100021317 | SERIAL AXIAL FAN - A serial axial fan includes first and second axial fans. Each of the first and second axial fans includes a base portion and a plurality of support ribs arranged to connect the base portions to housings. The first and second axial fans are coupled together with the base portions thereof either in contact with or in close proximity to each other. Each of the support ribs in each of the first and second axial fans extends over both housings of the first and second axial fans. | 01-28-2010 |
20100119385 | SERIAL AXIAL FAN - A serial axial fan preferably includes a first impeller and a second impeller each having a plurality of blades radially extending with a predetermined rotation axis as the center, a first motor portion, a second motor portion, a first housing, and a second housing. The first motor portion has a first circuit board on which at least one electronic component arranged to control the driving of the first impeller is mounted. The second motor portion has a second circuit board on which at least one electronic component arranged to control the driving of the second impeller is mounted. The first and second circuit boards are electrically connected. The driving of the first impeller and the driving of the second impeller are controlled by the electronic component disposed on at least one of the first and second circuit boards. | 05-13-2010 |
20100215505 | BLOWER IMPELLER AND BLOWER - A blower impeller includes a substantially cylindrical cup portion, and a plurality of blades arranged on an outer circumferential surface of a circumferential wall portion of the cup portion. The cup portion includes on an inner circumferential surface of the circumferential wall portion thereof a plurality of axially extending first ribs and a plurality of second ribs arranged between the first ribs. The first and second ribs are arranged in a circumferential direction. A virtual envelope joining radially inner end portions of the first ribs has a smaller diameter than that of a virtual envelope joining radially inner end portions of the second ribs. | 08-26-2010 |
20110318200 | BLOWER FAN AND METHOD OF MANUFACTURING THE SAME - A blower fan includes a rotor arranged to rotate about a rotation axis together with a shaft, a stator arranged radially outward of the rotor and opposite the rotor, a motor support portion arranged to support the shaft through a bearing such that the shaft is rotatable, and an impeller arranged to rotate together with the shaft. The motor support portion includes a base portion, a bearing support portion arranged to support the bearing, and a stator support portion arranged to support the stator. Each of at least a portion of the bearing support portion which is in contact with the bearing and at least a portion of the stator support portion which is in contact with the stator is defined by a metallic member coupled to the base portion, which is made of a resin, preferably through, for example, insert molding. | 12-29-2011 |
20120107156 | BLOWER FAN - A blower fan includes a shaft including an outer circumferential surface, a rotor magnet arranged to rotate about a rotation axis together with the shaft, a stator arranged radially outwards of the rotor magnet in an opposing relationship with the rotor magnet, a substantially cylindrical holder unit arranged to rotatably support the shaft through a bearing, and an impeller arranged to rotate together with the shaft. The bearing includes a pair of axially spaced-apart bearing units. The rotor magnet and the stator are arranged between the bearing units. The bearing units and the stator are held on an inner circumferential surface of the holder unit. | 05-03-2012 |
20120269665 | BLOWER FAN - A motor arranged to rotate an impeller includes a rotor magnet fixed to a shaft, and a stator arranged opposite to the rotor magnet. The motor is arranged on an axially lower side of an impeller cup. The stator is fixed to an inner circumferential surface of a stator support portion. An opening-side end portion of the impeller cup is arranged opposite to an upper surface of the stator support portion. The upper surface of the stator support portion includes an expanded portion defined in a portion thereof which is opposed to the opening-side end portion of the impeller cup. The expanded portion is preferably located a greater distance from the opening-side end portion of the impeller cup than a distance between the opening-side end portion and a remaining portion of the upper surface of the stator support portion. | 10-25-2012 |
20140300255 | MOTOR PROVIDED WITH A PRINTED CIRCUIT BOARD - A motor includes a stationary unit, a rotary unit, and a bearing unit. The stationary unit includes a stator, a PCB and a base member. The stator includes a stator core and coils. The stator is arranged radially outward of the bearing unit. The PCB includes through-hole portions, land portions and PCB fixing portions. The base member includes a stator holding portion arranged to hold the stator and a bearing holding portion arranged to hold the bearing unit. The rotary unit includes a shaft positioned radially inward of the bearing unit and a magnet opposed to a circumferential surface of the stator core. The through-hole portions are arranged along a circumferential direction of the PCB. At least a portion of the PCB axially overlaps with the bearing unit. The PCB fixing portions are arranged radially outward of the through-hole portions. | 10-09-2014 |
20140363272 | SERIAL AXIAL FAN - A fan includes a first motor portion, a first impeller fixed to a first rotating portion of the first motor portion, a second motor portion arranged along a central axis of the first motor portion, a second impeller fixed to a second rotating portion of the second motor portion, a tubular wind channel portion arranged to surround the first and second impellers, and support ribs arranged to join the wind channel portion to the first and second motor portions. The first impeller includes first blades arranged in a circumferential direction about the central axis and the second impeller includes second blades arranged in the circumferential direction, a rotation direction of the second impeller is opposite to a rotation direction of the first impeller. A surface of each first blade which faces the second impeller is concave. A surface of each second blade which faces the first impeller is concave. | 12-11-2014 |