Abstract: A fan motor includes a motor, an impeller and a housing. The housing includes an inner wall portion, a silencer portion, and a communicating opening. The inner wall portion extends along a rotation axis to assume a tubular shape, and houses at least a portion of the impeller therein. The silencer portion includes a portion radially outside of the inner wall portion, and defines a silencing space between the inner wall portion and the silencer portion. The communicating opening brings a space inside of the inner wall portion into communication with the silencing space. A portion of the communicating opening is defined by an end portion of the inner wall portion on an inlet side. The silencing space covers only a portion of the circumferential extent of the inner wall portion. This allows the silencing space to be arranged in a dead space around the inner wall portion.

Abstract: This fan motor includes a motor, an impeller arranged to rotate together with a rotating portion of the motor, and a housing arranged to house the motor and the impeller therein. The housing includes an inner wall portion, a silencer portion, and a communicating opening. The inner wall portion is arranged to extend along a rotation axis to assume a tubular shape, and is arranged to house at least a portion of the impeller therein. The silencer portion includes a portion arranged radially outside of the inner wall portion, and is arranged to define a silencing space between the inner wall portion and the silencer portion. The communicating opening is arranged to bring a space inside of the inner wall portion into communication with the silencing space. A portion of the communicating opening is defined by an end portion of the inner wall portion on an inlet side. The silencing space is arranged to cover only a portion of the circumferential extent of the inner wall portion.

Abstract: A motor includes a stationary unit and a rotary unit arranged to rotate with respect to the stationary unit about a center axis extending in an up-down direction. The rotary unit includes a substantially cylindrical rotor holder, a plurality of magnets disposed radially inward of the rotor holder and arranged along a circumferential direction, and a non-magnetic magnet holder fixed to an inner circumferential surface of the rotor holder and arranged to hold the magnets. The magnet holder includes a plurality of pillars extending in the up-down direction and arranged to position the magnets in the circumferential direction, and a first ring and a second ring arranged to interconnect the pillars at positions spaced apart in the up-down direction. The first ring is positioned radially outward of the second ring, and the second ring is positioned radially inward of outer circumferential surfaces of the pillars.