Fan motor

A fan motor for a vacuum cleaner, comprising:

• a motor mount that accommodates a motor;
• a diffuser disposed vertically above the motor mount;
• an impeller disposed vertically above the diffuser and configured to be rotated by the motor;
• and
• an impeller cover that is disposed vertically above the motor mount and covers the impeller and the diffuser,
• wherein an outer surface of the diffuser and an inner surface of the impeller cover define a flow passage configured to guide air pressurized by the impeller,
• wherein the diffuser comprises a diffuser body that comprises a flat portion, the flat portion covering an inner space of the motor mount from the impeller, and
• wherein the diffuser body defines a cooling flow path outlet at a first portion of the diffuser adjacent to the impeller, the cooling flow path outlet being configured to discharge air from the inner space of the motor mount to the flow passage based on the flow passage having a lower pressure than the inner space of the motor mount by rotation of the impeller.

A fan motor for a vacuum cleaner, comprising:

• a motor body part comprising a motor mount that defines a cooling flow path inlet at a lower side or a lateral side of the motor mount, the cooling flow path inlet being configured to introduce air to the motor mount;
• a motor accommodated in the motor mount and configured to generate a torque;
• an impeller located vertically above the motor and configured to be rotated by the torque generated by the motor;
• a diffuser that is in contact with the motor body part and disposed between the impeller and the motor body part, the diffuser being configured to guide air pressurized by the impeller to an outer space of the motor mount;
• and
• an impeller cover that is coupled to an upper side of the motor body part and covers the impeller and the diffuser, the impeller cover defining an air inlet at an upper portion thereof,
• wherein the diffuser comprises a flat portion that covers an inner space of the motor mount from the impeller, and
• wherein the diffuser defines a cooling flow path outlet at a first portion of the diffuser adjacent to the impeller, the cooling flow path outlet being configured to discharge the air introduced to the motor mount to an upper space defined between the diffuser and the impeller cover.