Brushless fan motor and positive airway pressure breathing apparatus using the same

A positive airway pressure breathing apparatus, comprising:

• a box having a fist air hole and a second air hole;
• a brushless fan motor disposed in the box, wherein the brushless fan motor comprises:
• a case having a top, a bottom and a side wall located between the bottom and the top, the top having an inlet disposed thereon, the side wall having an outlet disposed thereon, the inlet being communicated with the fist air hole, and the outlet being communicated with the second air hole;
• a tubular part disposed in the case and an end of the tubular part being fixed at the bottom;
• at least a bearing disposed in the tubular part;
• a toric coil surrounding the tubular part;
• and
• a rotating assembly, comprising:
• a turntable having a top surface facing the top of the case and a plurality of fan blades disposed on the top surface;
• a rotating shaft disposed through the bearing, and an end of the rotating shaft being connected to the turntable;
• a loading ring connected to the turntable and surrounding the toric coil;
• a permeability metal element having an annular part fixed at an inner wall of the loading ring;
• and
• a toric radial magnet fixed at an inner wall of the annular part of the permeability metal element;
• a power control module disposed in the box and electrically connected to the brushless fan motor;
• and
• a circuit board assembly disposed in the box and electrically connected to the power control module.