Electric blower and electric cleaner with an air cooled power device situated between the impeller and motor
First Claim
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1. An electric blower comprising:
- a motor unit including a stator and a rotor;
a fan unit including an impeller attached to an output shaft of said rotor and including a casing covering said impeller; and
a circuit unit including an electric power device for controlling electric power to said motor unit, said circuit unit being arranged between said motor unit and said impeller such that said electric power device is located in an airflow path of air expelled from an outer periphery of said impeller to said motor unit.
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Abstract
An electric blower includes a motor unit having a stator and a rotor, a fan unit having an impeller attached to an output shaft of the rotor, and a circuit unit having a heat-generating component for controlling electric power to the motor unit. The circuit unit is arranged in an airflow path of air expelled from an outer periphery of the impeller toward the stator and the rotor of the motor unit. The air suctioned by rotation of the impeller cools the heat-generating component in the circuit unit before cooling the stator and the rotor.
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Citations
36 Claims
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1. An electric blower comprising:
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a motor unit including a stator and a rotor;
a fan unit including an impeller attached to an output shaft of said rotor and including a casing covering said impeller; and
a circuit unit including an electric power device for controlling electric power to said motor unit, said circuit unit being arranged between said motor unit and said impeller such that said electric power device is located in an airflow path of air expelled from an outer periphery of said impeller to said motor unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 35, 36)
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32. An electric cleaner comprising:
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a dust chamber for collecting dust;
a suction port connected to said dust chamber in communication therewith; and
an electric blower, said electric blower comprising;
a motor unit including a stator and a freely rotatable rotor;
a fan unit including an impeller attached to an output shaft of said rotor and including a casing covering said impeller; and
a circuit unit including an electric power device for controlling electric power to said motor unit, said circuit unit being arranged between said motor unit and said impeller such that said electric power device is located in an airflow path of air expelled from an outer periphery of said impeller to said motor unit. - View Dependent Claims (33, 34)
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Specification