Mitsubishi Electric Corporation

Mitsubishi Electric Home Appliance Co., Ltd.

Mitsumasa Hamazaki

Naho Adachi

Masaya Teramoto

Takashi Ikeda

Kazuchika Tsuchida

Mamoru Hayatsu

Naohiro Oketani

Kazunori Hatakeyama

Sachiko Kawasaki

Takayuki Onihashi

Satoshi Hakoda

Takehiko Ajima

Yuta Takahashi

Yutaka Nomiyama

A stator includes four split cores arranged in the circumferential direction. Each split core includes a yoke including a pair of joint parts, and a tooth. The shape of an end of the tooth is asymmetrical. An angle θ1 (degrees) formed by a side surface of the tooth and a side surface of the yoke on the inner side in the radial direction of the stator satisfies 90 degrees<θ1<180 degrees.

Stator, electric motor, vacuum cleaner, and hand drying device

An electric blower includes a motor unit, a shaft, a centrifugal impeller, a fan cover, a motor unit case, and a bracket located away from centrifugal impeller and toward motor unit in a direction in which a central axis of the shaft extends. The bracket includes a first portion located outward of the vent in a radial direction, and a second portion located outward of the first portion and outward of an outer circumference of the motor unit case in the radial direction. A first airflow passage and a second airflow passage are formed in the bracket, the first and second airflow passages communicate with an airflow passage formed by the centrifugal impeller and the fan cover.

Electric blower, electric vacuum cleaner, and hand drier

An electric blower includes a motor including a rotor having a rotation shaft, and a stator provided to surround the rotor, a moving blade mounted at one end side of the rotation shaft in the axial direction of the rotation shaft, a bearing portion provided between the moving blade and the stator in the axial direction and rotatably supporting the rotation shaft, and a frame. The frame includes a motor housing portion housing the stator, a bearing housing portion housing the bearing portion, a wall formed between the motor housing portion and the bearing housing portion and facing the moving blade, and a hole passing through the wall. The electric blower further includes a first air path outside the frame, and a second air path inside the frame. An air volume in the first air path is larger than an air volume in the second air path.

Electric blower, electric vacuum cleaner, and hand dryer

An electric blower includes: an electric motor portion including a rotation shaft; a centrifugal impeller; and a heat dissipating portion connecting the centrifugal impeller and the rotation shaft. A boss portion of the centrifugal impeller is provided with a first hole extending in an extending direction of the rotation shaft. The heat dissipating portion includes a first portion connected to an inner circumferential surface of the first hole, and a second portion connected to the first portion in the extending direction and located outside the first hole. A length of the heat dissipating portion in the extending direction is longer than a length of the first hole in the extending direction.

Electric blower, electric vacuum cleaner and hand dryer

A centrifugal impeller high in efficiency and suction power, an electric blower having the centrifugal impeller, and an electrical apparatus provided with the electric blower are obtained. The centrifugal impeller includes a hub and a plurality of rotor blades. The plurality of rotor blades are coupled to a surface portion of the hub. At least one of the plurality of rotor blades includes an end portion, a first surface, and a second surface. The end portion includes a planar portion and a curved portion. The planar portion is continuous to the second surface and has a flat surface. The curved portion connects the planar portion and the first surface to each other and has a curved surface.

Centrifugal impeller, electric blower, electric vacuum cleaner, and hand dryer

A stator includes a first split core having a first yoke part extending in a circumferential direction about an axis line and a first tooth extending from the first yoke part toward the axis line, a second split core having a second yoke part extending in the circumferential direction and a second tooth extending from the second yoke part toward the axis line, a first insulator arranged to surround the first tooth and having a first holding part located between a tip end part of the first tooth and a tip end part of the second tooth, a second insulator arranged to surround the second tooth and having a second holding part located between the tip end part of the first tooth and the tip end part of the second tooth, and a Hall effect sensor held by the first holding part and the second holding part.

Stator, motor, blower, vacuum cleaner, and method for attaching hall effect sensor

A motor includes a frame including a first bearing holder, a stator, a first bearing held in the first bearing holder, a rotor rotatably supported by the first bearing, and a preload member generating a preload in a direction of an axis line of the rotor. The frame further includes a first frame part. The first frame part includes a support part supporting the preload member. An outer end part of the preload member faces the support part so as to be covered with the support part.

Growing community of inventors

Saitama, Japan

Mitsumasa Hamazaki