Plenum/plug fan assembly

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a frame within which said fan wheel is supported for rotation about a central axis thereof;
• c. first air outlet diffusing structure supported by a portion of said frame adjacent said back plate of said fan wheel, said first air outlet diffusing structure comprising a peripheral region;
• d. a second air outlet diffusing structure supported by a portion of said frame adjacent said front plate of said fan wheel, said second air outlet diffusing structure comprising a peripheral region, air exiting said annular air outlet of said fan wheel passing between said peripheral regions of said diffusing structures;
• e. a third air outlet diffusing structure supported by a portion of said frame intermediate said first and second air outlet diffusing structures;
• and,
• f. an air inlet diffusing assembly supported by a portion of said frame adjacent said axial air inlet of said fan wheel, said air inlet diffusing assembly comprising a dissapative silencer.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a frame within which said fan wheel is supported for rotation about a central axis thereof;
• c. first air outlet diffusing structure supported by a portion of said frame adjacent said back plate of said fan wheel, said first air outlet diffusing structure comprising a peripheral region;
• d. a second air outlet diffusing structure supported by a portion of said frame adjacent said front plate of said fan wheel, said second air outlet diffusing structure comprising a peripheral region, air exiting said annular air outlet of said fan wheel passing between said peripheral regions of said diffusing structures;
• e. a third air outlet diffusing structure supported by a portion of said frame intermediate said first and second air outlet diffusing structures;
• and,
• f. an air inlet diffusing assembly supported by a portion of said frame adjacent said axial air inlet of said fan wheel, said air inlet diffusing assembly comprising a tuned resonator section extending from a dissapative silencer.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a frame within which said fan wheel is supported for rotation about a central axis thereof;
• c. first air outlet diffusing structure supported by a portion of said frame adjacent said back plate of said fan wheel, said first air outlet diffusing structure comprising a peripheral region;
• d. a second air outlet diffusing structure supported by a portion of said frame adjacent said front plate of said fan wheel, said second air outlet diffusing structure comprising a peripheral region, air exiting said annular air outlet of said fan wheel passing between said peripheral regions of said diffusing structures;
• and,
• e. an air inlet diffusing assembly supported by a portion of said frame adjacent said axial air inlet of said fan wheel, said air inlet diffusing inlet defining an annular air inlet proximal said air inlet cone, said air inlet diffusing assembly comprising a dissapative silencer.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a frame within which said fan wheel is supported for rotation about a central axis thereof;
• c. first air outlet diffusing structure supported by a portion of said frame adjacent said back plate of said fan wheel, said first air outlet diffusing structure comprising a peripheral region;
• d. a second air outlet diffusing structure supported by a portion of said frame adjacent said front plate of said fan wheel, said second air outlet diffusing structure comprising a peripheral region, air exiting said annular air outlet of said fan wheel passing between said peripheral regions of said diffusing structures;
• and,
• e. an air inlet diffusing assembly supported by a portion of said frame adjacent said axial air inlet of said fan wheel, a spacing between free edges of peripheral regions of said diffusing structures being less than a spacing between a free edge of said back plate and a free edge of said front plate.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a frame within which said fan wheel is supported for rotation about a central axis thereof;
• c. first air outlet diffusing structure supported by a portion of said frame adjacent said back plate of said fan wheel, said first air outlet diffusing structure comprising a peripheral region;
• d. a second air outlet diffusing structure supported by a portion of said frame adjacent said front plate of said fan wheel, said second air outlet diffusing structure comprising a peripheral region, air exiting said annular air outlet of said fan wheel passing between said peripheral regions of said diffusing structures;
• and,
• e. an air inlet diffusing assembly supported by a portion of said frame adjacent said axial air inlet of said fan wheel, a spacing between free edges of peripheral regions of said diffusing structures being substantially equal to a spacing between a free edge of said back plate and a free edge of said front plate.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a first air outlet diffusing structure operatively supported adjacent said back plate of said fan wheel so as to be substantially planar therewith;
• and,
• c. a second air outlet diffusing structure operatively supported adjacent said front plate of said fan wheel so as to be substantially non-planar therewith, either of said first or second air outlet diffusing structures including sound insulating means.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a first air outlet diffusing structure operatively supported adjacent said back plate of said fan wheel so as to be substantially planar therewith;
• and,
• c. a second air outlet diffusing structure operatively supported adjacent said front plate of said fan wheel so as to be substantially non-planar both said first and second air outlet diffusing structures including sound insulating means.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a first air outlet diffusing structure operatively supported adjacent said back plate of said fan wheel so as to be substantially planar therewith;
• c. a second air outlet diffusing structure operatively, supported adjacent said front plate of said fan wheel so as to be substantially non-planar therewith;
• and,
• d. a third air outlet diffusing structure intermediate said first and second air outlet diffusing structures, one or more of said air outlet diffusing structures including sound insulating means.

A fan assembly comprising:

• a. a fan wheel having an axial air inlet delimited by an air inlet cone, an annular air outlet, a back plate, and front plate opposite said back plate;
• b. a first air outlet diffusing structure operatively supported adjacent said back plate of said fan wheel, said first air outlet diffusing structure including a perforated plate exposed to air flow from said annular air outlet, said perforated plate of said first air outlet diffusing structure being substantially planar with said back plate;
• and,
• c. a second air outlet diffusing structure operatively supported adjacent said front plate of said fan wheel, said second air outlet diffusing structure including a perforated plate exposed to air flow from said annular air outlet, said perforated plate of said second air outlet diffusing structure characterized by an angle of inclination θ relative to said front plate so as to result in a radially reducing width for said annular air outlet.

A fan assembly comprising:

• a. a fan wheel characterized by an axial air inlet, an annular air outlet, a back plate, and front plate opposite said back plate, said fan wheel operatively supported for rotation about a central axis;
• b. a first air outlet diffusing structure operatively supported adjacent said back plate of said fan wheel, said first air outlet diffusing structure including a perforated plate exposed to air flow associated with said annular air outlet, said perforated plate of said first air outlet diffusing structure being substantially planar with said back plate;
• and,
• c. a second air outlet diffusing structure operatively supported adjacent said front plate of said fan wheel, said second air outlet diffusing structure including a perforated plate exposed to air flow associated with said annular air outlet, said perforated plate of said second air outlet diffusing structure radially extending from said central axis so as to converge in a direction towards said perforated plate of said first air outlet diffusing structure.