| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor-driven pump capable of increasing flow rate. SOLUTION: In this motor-driven pump 1, a flow channel is formed inside a motor having a rotor 5 in a stator 4. The rotor 5 comprises a cylindrical part 31 having a magnet 36 and an impeller 32 disposed inside the cylindrical part 31, and the inside of the cylindrical part 31 is used as the flow channel F. The outer peripheries of both ends of the cylindrical part 31 are supported by bearings 3, thereby removing the bearings 3 from the inside of the flow channel F to prevent the bearings 3 from functioning as a flow channel resistance. The impeller 32 has blades 39 twisted spirally from one end to the other end of the cylindrical part 31, and blade area of the impeller 39 is enlarged.
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