Nidec Corporation

Shingo Yoshino

Takamasa Yamashita

Yoshihiro Uchitani

Shigekatsu Matsuda

Tomoaki Ando

Naoya Nonomura

An air blower includes an impeller rotatable about a central axis extending vertically, a motor to rotate the impeller, and a holder to hold the motor. The air blower is a centrifugal air blower which generates a radial airflow perpendicular to the central axis. The holder includes a base supporting the motor, attachments on a radial directional-outer side of the impeller, arms connecting the base and each of the attachments, and a wall surface on a side of the impeller, between the base and each attachment, and opposing a radial-directional inner side. An axial lower end of the impeller is located below an axial upper end of the wall surface.

Air blower

A centrifugal fan includes an impeller with a base expanded radially, vanes arranged circumferentially, extending from a radially inner side to a radially outer side, and ends thereof at one axial side being connected to the base, and a ring portion connecting ends of the vanes at the other axial side. The vanes include first vanes and second vanes, when viewed axially, the lengths of the second vanes are larger than the lengths of the first vanes, the first vanes and the second vanes are circumferentially arranged alternatingly. Gaps are provided between radially outer ends of the first vanes and the second vanes that are circumferentially adjacent to each other, and sizes of circumferentially adjacent ones of the gaps are different from each other.

Impeller

An air blower includes an impeller rotatable about a central axis extending vertically, a motor to rotate the impeller, and a holder to hold the motor. The holder includes a base on which the motor is provided, attachments on a radial directional-outer side of the impeller, arms connecting the base and the attachments, and a wall surface on a side where the impeller is disposed, between the base and each attachment, and facing a radial-directional inner side. The wall surface includes a first surface extending outwardly in the radial direction and directed towards the front in the rotational direction of the impeller.

A motor includes a rotor, a stator, and a circuit board below the stator. The stator includes an insulator to cover at least a portion of each of an upper surface, a lower surface, and circumferential side surfaces of each of teeth of the stator, coils each of which is defined by a conducting wire wound around a separate one of the teeth with the insulator therebetween, and a drawn-out wire drawn out from the coils and electrically connected to the circuit board. A lower portion of the insulator includes a guide radially outward of the coils and including a wall extending downward from a lower surface of the insulator and a bend extending radially outward from a lower end of the wall. At least a portion of the drawn-out wire extends in a circumferential direction along a radially outer surface of the wall.

Motor and blower apparatus

A dryer includes a body portion arranged to hold a motor, a first tubular portion arranged to at least partially cover an outer circumferential portion of the body portion, and a second tubular portion arranged axially behind the first tubular portion, and arranged to at least partially cover the outer circumferential portion of the body portion. An outer circumferential joining portion included in the body portion is held between an axial rear edge portion of the first tubular portion and an axial front edge portion of the second tubular portion.

Growing community of inventors

Kyoto, Japan

Shingo Yoshino