PUMP, METHOD FOR MANUFACTURING PUMP, AND REFRIGERATION CYCLE DEVICE

摘要

Provided is a pump 10 that includes an annular molded stator 50 having a substrate 58 mounted with a Hall element 58b and that includes a rotor 60 having an annular rotor unit 60a rotatably housed in a cup-shaped partition component 90, with one end thereof in an axial direction facing the Hall element 58b and the other end thereof in the axial direction provided with an impeller attachment unit 67a to which an impeller 60b is attached. The rotor unit 60a includes a resin magnet 68, a sleeve bearing 66 provided inside of the resin magnet 68, and a resin portion 67 used for integrally molding the resin magnet 68 and the sleeve bearing 66 and constituting the impeller attachment unit 67a. The resin magnet 68 includes a rotor-position detecting magnetic-pole portion 68f protruding axially with a predetermined height in an annular shape having a predetermined width in a radial direction on an outer periphery of an end face opposite to the Hall element 58b. The rotor-position detecting magnetic-pole portion 68f includes a plurality of arc-shaped notches 68g on the same circumference on an inner diameter side thereof.