Electric blower and electric equipment
AssigneeMitsubishi Electric Corporation
InventorsKazuchika Tsuchida, Naho Adachi
Life of this patent
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Abstract
An electric blower includes: a motor including a rotary shaft; a first centrifugal fan fixed to a first end side of the rotary shaft; a second centrifugal fan fixed to a second end side of the rotary shaft opposite to the first end side; and a casing surrounding the motor, the first centrifugal fan and the second centrifugal fan. In the electric blower, first force applied by the first centrifugal fan to the rotary shaft in a first direction in an axial direction of the rotary shaft and second force applied by the second centrifugal fan to the rotary shaft in a second direction in the axial direction of the rotary shaft are opposite to each other during rotation of the rotary shaft.
Claims18
An electric blower comprising:
- a motor including a stator, a rotor core, and a rotary shaft fixed to the rotor core;
- a first centrifugal fan fixed to a first end side of the rotary shaft;
- a second centrifugal fan fixed to a second end side of the rotary shaft opposite to the first end side;
- and
- a casing surrounding the stator, the rotor core, the rotary shaft, the first centrifugal fan and the second centrifugal fan,
- wherein the casing includes:
- a first opening part provided on the first end side and making an air current generated by the first centrifugal fan pass through;
- a second opening part provided on the second end side and making an air current generated by the second centrifugal fan pass through;
- and
- a third opening part provided between the first centrifugal fan and the second centrifugal fan,
- wherein first force applied by the first centrifugal fan to the rotary shaft in a first direction in an axial direction of the rotary shaft and second force applied by the second centrifugal fan to the rotary shaft in a second direction in the axial direction of the rotary shaft are opposite to each other during rotation of the rotary shaft,
- wherein the air currents generated by the first centrifugal fan flow through the first opening part into the casing without passing through the second centrifugal fan, thereby passing between the stator and the rotor core in the casing, and the air currents generated by the second centrifugal fan flow through the second opening part into the casing without passing through the first centrifugal fan, thereby passing between the stator and the rotor core in the casing.
Dependencies are inferred from the claim text.