Clean air fan filter module
First Claim
Patent Images
1. A clean air fan filter module without a physical damper or intermediate baffle assembly comprising:
- a fan shroud having an air inlet, an air inlet ring having horizontal flanges which sit on said fan shroud and vertical interior walls extending through said air inlet, said ring moveable relative to said air inlet, a pre-filter, two inclined ends, and a planar top surface having formed therein, offset ribs with four sides extending about said air inlet, said ribs including means to receive and support said pre-filter;
a fan/motor mount;
a centrifugal fan blowing air radially toward the fan shroud;
a fan and motor mounted on said fan/motor mount below said air inlet at a level entirely below said shroud top planar surface; and
,a HEPA filter serving as an air outlet.
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Abstract
A clean air fan filter module including a fan shroud, a fan/motor mount, a centrifugal fan, a fan motor, and a HEPA filter, the fan shroud having an air inlet and two inclined ends, the fan/motor mounted below the air inlet on the fan/motor mount, the centrifugal fan blowing air radially towards the fan shroud, the HEPA filter constituting the air outlet.
45 Citations
15 Claims
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1. A clean air fan filter module without a physical damper or intermediate baffle assembly comprising:
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a fan shroud having an air inlet, an air inlet ring having horizontal flanges which sit on said fan shroud and vertical interior walls extending through said air inlet, said ring moveable relative to said air inlet, a pre-filter, two inclined ends, and a planar top surface having formed therein, offset ribs with four sides extending about said air inlet, said ribs including means to receive and support said pre-filter; a fan/motor mount; a centrifugal fan blowing air radially toward the fan shroud; a fan and motor mounted on said fan/motor mount below said air inlet at a level entirely below said shroud top planar surface; and
,a HEPA filter serving as an air outlet. - View Dependent Claims (2, 3, 4, 5)
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6. A clean air fan filter module comprising:
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a fan shroud assembly having an air inlet, a prefilter, a planar top surface having curved ends to direct airflow downwardly, offset ribs formed in said planar top surface having four sides extending about said air inlet, said ribs further including means to receive and support said pre-filter, an air inlet ring having horizontal flanges supported by said fan shroud assembly and vertical interior walls extending through said air inlet, said ring movable relative to said air inlet such that said air inlet ring may be aligned with respect to said inlet; a fan mount assembly, a HEPA filter assembly for air outlet, means for fastening the fan mount assembly and fan shroud assembly together and means for fastening a top portion of the HEPA filter assembly to a bottom portion of the fan shroud assembly to form a clean air fan filter module. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A damper-less, clean air fan filter module which does not require an intermediate baffle comprising:
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a fan shroud having a planar top surface which transitions into curved ends extending downwardly substantially through ninety degrees; a pre-filter; an air inlet formed in said shroud planar top surface; a centrifugal fan and fan motor for blowing air radially towards said shroud curved ends; offset ribs having four sides formed in said shroud top planar surface about said air inlet, said ribs further having a top surface having means to receive and support said pre-filter; an air inlet ring having horizontal flanges supported by said fan shroud and vertical interior walls extending through said air inlet, said air inlet ring moveable with respect to said air inlet allowing alignment over said centrifugal fan; means for mounting said centrifugal fan and fan motor to said shroud underneath said air inlet, said fan and fan motor positioned entirely below said shroud planar top surface; and
,an air outlet comprising a HEPA filter assembly attached to said fan shroud. - View Dependent Claims (15)
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Specification