Multiple impeller fan for a shrouded floor drying fan
First Claim
Patent Images
1. A fan, comprising:
- a shroud having an air inlet orifice, an air outlet orifice, and a confined space there between;
air permeable protective covers secured to each of the air inlet orifice and the air outlet orifice;
a motor having an elongated drive shaft, the motor being secured to the shroud with the drive shaft extended along a longitudinal axis thereof between the air inlet orifice and the air outlet orifice;
a plurality of impellers secured in tandem to the elongated drive shaft; and
wherein the air permeable protective cover secured to the air outlet orifice further comprises a directional grille having a plurality of individual spaced-apart baffle surfaces being structured for directing at least a portion of an air stream generated by the impellers within the confined space of the shroud into a zone directly adjacent to the grille at an approximate center thereof and in substantial axial alignment with the longitudinal axis of the shroud and the drive shaft of the motor.
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Abstract
A method and apparatus for drying floors and carpets using a double impeller fan for generating a pressurized air stream within a vertical cylindrical fan shroud that is spaced two to five inches away from the floor on a set of legs such that an opening is formed between the shroud and the floor. The air stream is directed along the cylindrical shroud vertically toward the floor. At least a peripheral portion of the air stream is exhausted from the shroud in a substantially laminar flow at an angle that is inclined from the vertical and is exhausted radially into ambient air as a substantially laminar air stream.
67 Citations
22 Claims
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1. A fan, comprising:
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a shroud having an air inlet orifice, an air outlet orifice, and a confined space there between; air permeable protective covers secured to each of the air inlet orifice and the air outlet orifice; a motor having an elongated drive shaft, the motor being secured to the shroud with the drive shaft extended along a longitudinal axis thereof between the air inlet orifice and the air outlet orifice; a plurality of impellers secured in tandem to the elongated drive shaft; and wherein the air permeable protective cover secured to the air outlet orifice further comprises a directional grille having a plurality of individual spaced-apart baffle surfaces being structured for directing at least a portion of an air stream generated by the impellers within the confined space of the shroud into a zone directly adjacent to the grille at an approximate center thereof and in substantial axial alignment with the longitudinal axis of the shroud and the drive shaft of the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fan, comprising:
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a tubular shroud having a substantially circular air inlet orifice and a substantially circular air outlet orifice spaced apart by a substantially cylindrical wall; an air permeable protective cover secured to the air inlet orifice; a louvered grille secured to the air outlet orifice; an electric fan motor suspended within the shroud between the air inlet and outlet orifices, the fan motor having an elongated drive shaft substantially aligned with a longitudinal axis of the tubular shroud; a pair of impellers secured in tandem to the drive shaft, an impeller distal from the motor being positioned in close proximity to the louvered grille secured to the air outlet orifice; and wherein the louvered grille further comprises a central baffle having a plurality of individual spaced-apart baffle surfaces positioned for driving air into a space in substantial axial alignment with the longitudinal axis of the tubular shroud and the drive shaft of the fan motor and directly proximate to and downstream of the grille. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A fan, comprising:
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a substantially cylindrical fan shroud having an inlet orifice and an outlet orifice spaced apart by a substantially cylindrical space; a pair of tandem fan impellers; a means for suspending the pair of fan impellers within the cylindrical space for rotation about a rotational axis substantially aligned with a longitudinal axis of the cylindrical space; a means for driving the pair of fan impellers in substantially identical angular rotation about the rotational axis; and means for directing at least a portion of an air stream generated by the pair of fan impellers within the substantially cylindrical space of the fan shroud across a plurality of individual spaced-apart baffle surfaces into a zone directly adjacent to the outlet orifice at an approximate center thereof and in substantial axial alignment with the rotational axis. - View Dependent Claims (19, 20, 21, 22)
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Specification