Electric blower and electric apparatus equipped therewith
First Claim
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1. An electric blower, comprising:
- a motor having a rotation shaft;
a centrifugal fan fitted to the rotation shaft of the motor, the fan having an exhaust port;
a case for housing the motor and the centrifugal fan, the case including a partition wall constituting an air channel between the exhaust port of the centrifugal fan and the motor; and
a drive circuit including a power device for driving the motor, wherein the power device is fixed on the outer surface of the partition wall.
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Abstract
By arranging a power device or devices on the outer face of a partition wall such as a linking portion (flange portion) constituting a flow passage between the exhaust port of a centrifugal fan and a motor, the power device or devices can be efficiently cooled without disturbing the air flow in an air channel within a case and without increasing in pressure loss of the air channel. Moreover, the power device or devices are not affected by heat from the motor since they are positioned farther upstream than the motor, in the air flow from the centrifugal fan.
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Citations
12 Claims
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1. An electric blower, comprising:
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a motor having a rotation shaft;
a centrifugal fan fitted to the rotation shaft of the motor, the fan having an exhaust port;
a case for housing the motor and the centrifugal fan, the case including a partition wall constituting an air channel between the exhaust port of the centrifugal fan and the motor; and
a drive circuit including a power device for driving the motor, wherein the power device is fixed on the outer surface of the partition wall. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electric apparatus for causing air flow, comprising:
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an electric blower including;
a motor having a rotation shaft;
a centrifugal fan fitted to the rotation shaft of the motor, the fan having an exhaust port;
a case for housing the motor and the centrifugal fan, the case including a partition wall constituting an air channel between the exhaust port of the centrifugal fan and the motor; and
a drive circuit including a power device for driving the motor, wherein the power device is fixed on the outer surface of the partition wall.
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9. An electric apparatus comprising:
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an electric blower including;
a motor having a rotation shaft;
a centrifugal fan fitted to the rotation shaft of the motor, a case for housing the motor and the centrifugal fan, the case having a fan cover for covering the fan, a motor case for housing the motor, and a partition wall being located between the fan cover and the motor case for constituting an air channel from the fan to the motor, the fan cover having an outer circumferential wall greater in width than that of the motor case;
a drive circuit including a power device for driving the motor;
a blower chamber having a wall for housing the electric blower; and
a supporter located between the wall of the blower chamber and the outer circumferential wall of the fan cover for supporting the electric blower, wherein the power device is fixed on the outer surface of the partition wall. - View Dependent Claims (10, 11, 12)
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Specification