Patent
Blower having propeller fan positioned axially and radially with respect to a surrounding shroud for quieter fan operation
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TLDR
An air blower comprises a rotary fan having an array of radial blades, and a stationary bell mouth arranged in a coaxial encircling relationship to an outer periphery of the blade array as discussed by the authors.Abstract:
An air blower comprises a rotary fan having an array of radial blades, and a stationary bell mouth arranged in coaxial encircling relationship to an outer periphery of the blade array. Each blade includes an upstream side, and the bell mouth includes an upstream side. A radially inner end of the upstream side of the bell mouth is coplanar with radially outer ends of the upstream sides of the blades.read more
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Air handling system for buildings and clean rooms
TL;DR: In this paper, the authors present a system and method for air flow improvement in central air handling systems primarily for buildings and clean rooms, which is especially applicable to clean rooms and may include an air handling system for undivided and divided zones to filter the zone specific contaminants.
Patent
Method and apparatus for a plastic evaporator fan shroud assembly
Bruce A. Kopf,Tim L. Coulter,Richard A. Kirchner,Michael A. Bowen,Troy M. Anderson,Eric K. Silbaugh +5 more
TL;DR: An evaporator fan assembly includes a shroud with a plurality of irregularly staggered shroud legs radially outwardly spaced from a fan orifice and terminating in a motor mount.
Patent
Methods for air handling in buildings and clean rooms
TL;DR: In this paper, the authors present a system and method for air flow improvement in central air handling systems primarily for buildings and clean rooms, which is especially applicable to clean rooms and may include an air handling system for undivided and divided zones to filter the zone specific contaminants.
References
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Patent
Fan and housing.
TL;DR: In this paper, a circumferentially banded fan that forces air through an adjacent heat exchanger and has an air-guide housing positioned radially outside the band is described.
Patent
Fan unit for an internal combustion engine of automobile vehicle
TL;DR: In this paper, a fan unit for cooling an internal combustion engine comprising a fan impeller associated with a coaxial channel for guiding the air travelling through said impeller and an electric driving motor of DC type is presented.
Patent
Recirculation barrier for a heat transfer system
TL;DR: In this article, a liquid-cooled internal combustion engine is represented by a fan with a cylindrical exit throat section, a radial flat discharge section, and a radial expander or diverging section, where the impeller blades of the fan have a projected or effective axial width.
Patent
Fan shroud structure
TL;DR: A contoured shroud exit having means capable of producing low pressure vortices when a fan generated air stream is expelled therefrom is described in this article, where the authors describe a fan-generated air stream as a low pressure vortex.
Patent
Shroud assembly for axial flow fans
Abstract: An axial fan is disclosed that includes a hub (10) supported for rotation around the longitudinal axis of the fan, a plurality of impeller blades (12) attached to the hub (16) and extending radially from the axis of rotation, a shroud assembly (34) including a band (36) encircling the blades (12) and spaced from the tips of the blades (12) a sufficient distance to provide ample clearance to avoid contact between the blades (12) and the band (36) during shipment and operation of the fan, the shroud (34) further including an orifice (38) positioned upstream of the blades (12) for preventing air from flowing between the orifice (38) and the band (36), the orifice (38) having a downstream end located adjacent to but spaced from the impeller blades (12) and having a diameter such that the impeller blades (12) extend outwardly from the hub (10) beyond the orifice (38) so that the flow of air over the tips of the impeller blades (12) is substantially reduced, which increases the efficiency of the fan