Electric blower, vacuum cleaner, and hand dryer

An electric blower comprising:

• a fan;
• a motor to drive the fan;
• a first board including at least one switching element;
• and
• a second board including a microcomputer,
• wherein the motor, the first board, and the second board are arranged in this order in a blowing direction of the fan,
• wherein the first board is disposed of so that the first board is directly exposed to airflow blown from the fan,
• wherein the first board has a portion that allows the airflow to pass therethrough toward the second board, whereby the airflow blown from the fan reaches the first board and the second board,
• wherein the first board includes, on a surface on a side opposite the motor, an electrolytic capacitor,
• wherein the first board and the second board are arranged in an axial direction of the fan such that the airflow blown from the fan moves in the axial direction of the fan from an air inlet to the first board, after which the airflow
• passes through the portion of the first board that allows airflow to pass, and
• reaches the second board,
• wherein:
• the motor includes a frame, the electric blower includes a first airflow path outside the frame and a second airflow path inside the frame, and the first board faces the first airflow path and the second airflow path, and
• wherein:
• the motor further includes:
• a rotor;
• and
• a stator that
• is disposed to surround the rotor, including a plurality of slots in a circumferential direction of the rotor, and
• is fitted to an inner side of the frame, and
• the second airflow path includes an air gap between the rotor and the stator, the plurality of slots, and a gap between the stator and the frame.