US 11,852,167 B2
Motor and air conditioner using the same
Takaya Shimokawa, Tokyo (JP); Hiroki Aso, Tokyo (JP); and Naoki Tamura, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/623,788
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 5, 2019, PCT No. PCT/JP2019/030649
§ 371(c)(1), (2) Date Dec. 29, 2021,
PCT Pub. No. WO2021/024338, PCT Pub. Date Feb. 11, 2021.
Prior Publication US 2022/0243740 A1, Aug. 4, 2022
Int. Cl. F04D 29/58 (2006.01); F04D 25/06 (2006.01); F04D 29/054 (2006.01); F04D 29/26 (2006.01); F04D 29/28 (2006.01); F04D 29/60 (2006.01)
CPC F04D 29/5806 (2013.01) [F04D 25/06 (2013.01); F04D 29/054 (2013.01); F04D 29/263 (2013.01); F04D 29/281 (2013.01); F04D 29/5853 (2013.01); F04D 29/601 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A motor comprising:
a stator;
a consequent pole rotor including a rotor core and a magnet;
a casing housing the stator and the rotor;
a shaft comprising a non-magnetic material and fixed to the rotor;
an impeller fixed to the shaft; and
a first heat dissipation promoting means that is fixed to the shaft projecting outside the casing and rotates with the shaft,
wherein the first heat dissipation promoting means is one or more blower blades provided between the impeller and the casing in an axial direction of the shaft, and
wherein the motor is configured so that the blower blades generate airflow outward from a vicinity of the shaft, so that airflow along a surface of the shaft continuously occurs in a direction from the rotor toward the blower blades in a space between the rotor and the blower blades.