FAN MOTOR COOLING
First Claim
Patent Images
1. A fan assembly impeller, comprising:
- an impeller that moves air along a secondary flow path when driven by a motor, the motor also driving a fan rotor to move air along a primary flow path different than the secondary flow path, wherein air moving along the primary flow path moves in a first direction, and air moving along the secondary flow path moves in a second direction opposite the first direction.
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Abstract
An example fan assembly impeller moves air along a secondary flow path when driven by a motor. The motor also drives a fan rotor to move air along a primary flow path of the fan assembly. Air moving along the primary flow path moves in a first direction. Air moving along the secondary flow path moves in a second direction opposite the first direction. An example fan shroud communicates air used to cool a motor into a primary flow path of a fan assembly. The shroud communicates the air into the primary flow path so that the flow of air is at least partially aligned with air moving through the primary flow path of the fan assembly.
22 Citations
20 Claims
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1. A fan assembly impeller, comprising:
an impeller that moves air along a secondary flow path when driven by a motor, the motor also driving a fan rotor to move air along a primary flow path different than the secondary flow path, wherein air moving along the primary flow path moves in a first direction, and air moving along the secondary flow path moves in a second direction opposite the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fan shroud, comprising:
a shroud that communicates air used to cool a motor into a primary flow path of a fan assembly, wherein the shroud communicates air to the primary flow path so that the flow of the air is at least partially aligned with air moving through the primary flow path of the fan assembly. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A fan assembly, comprising:
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a fan rotor rotatable about an axis; an impeller; a motor positioned axially between the fan rotor and the motor, the motor configured to rotatably drive the impeller and the fan rotor, wherein the fan rotor moves air from the fan rotor axially toward the impeller along a primary flow path, and the impeller moves air from impeller axially toward the fan rotor along a secondary flow path; and a flow directing shroud defining an annular channel that directs air from the secondary flow path into the primary flow path. - View Dependent Claims (17, 18)
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19. A method of cooling a motor of a fan assembly, comprising:
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rotating a fan rotor with a motor; rotating an impeller with the motor; moving air through the motor using the impeller, wherein the motor is located axially between the fan rotor and the impeller. - View Dependent Claims (20)
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Specification