Air filtration system having a removable diffuser
AssigneeFiltration Group Incorporated
InventorsEdward F. Lyons, Wenli Wang, Philip J. Winters
Life of this patent
Estimating the term…
Abstract
An air filtration system includes a support structure, an enclosure coupled to the support structure and including an air outlet, a filter and a fan operatively coupled to the enclosure, and a diffusion screen configured to cover the air outlet. The diffusion screen includes a screen frame configured to be removably attachable to the enclosure with at least one releasable fastener, and at least a diffusion layer substantially spanning the screen frame to cover the air outlet to provide unidirectional or laminar air flow from the air outlet.
Claims29
1-44. (canceled)
A mobile air filtration system comprising:
- (a) an enclosure assembly comprising:
- (i) an enclosure including an air inlet and an air outlet;
- (ii) a screen frame operatively coupled to the air outlet of the enclosure;
- and
- (iii) a unidirectional flow screen spanning the screen frame, the unidirectional flow screen having a downstream side defined along a single plane, the unidirectional flow screen covering the air outlet of the enclosure to result in unidirectional filtered air flow;
- the unidirectional flow screen:
- (1) including at least a single layer of material constructed and arranged to provide unidirectional filtered air flow from the air outlet such that filtered air flows in a single direction with generally parallel air streamlines;
- and
- (2) creating only unidirectional parallel air streamlines across the flow screen, to shield an area from unfiltered air surrounding the area to result in filtered air that travels further to the area with lower levels of cross-contamination from particulates present in the surrounding unfiltered air than filtered air from an air filtration system without a unidirectional flow screen;
- (b) a mobile housing unit comprising:
- (i) a housing having an air inlet and an air outlet, the housing being movable relative to the enclosure;
- (ii) an air filter positioned between the air inlet and outlet;
- and
- (iii) a fan positioned within the housing;
- and
- (c) an air flow conduit operatively connecting the mobile housing to the enclosure assembly.
An air filtration system for providing unidirectional filtered air to a desired zone;
- the air filtration system comprising:
- (a) a support structure;
- (b) an enclosure coupled to the support structure and including an air outlet;
- (c) an air filter in communication with the air outlet;
- (d) a fan operatively coupled to the enclosure;
- (e) a screen frame;
- and
- (f) a unidirectional flow screen spanning the screen frame, the unidirectional flow screen having a downstream side defined along a single plane, the unidirectional flow screen covering the air outlet to result in unidirectional filtered air flow;
- the unidirectional flow screen:
- (i) being spaced from and parallel to the air filter;
- (ii) comprising multiple layers of polymeric fabric constructed and arranged to provide unidirectional filtered air flow from the air outlet such that air flows in a single direction with generally parallel air streamlines;
- (iii) having a weave pattern having pore sizes of no more than 250 micrometers;
- and
- (iv) resulting in only unidirectional parallel air streamlines across the flow screen to shield a work area from unfiltered air surrounding the work area.
An air filtration system for delivering a unidirectional filtered air flow to shield a work area from unfiltered air, the air filtration system comprising:
- (a) a unit comprising:
- (i) a support structure;
- (ii) an enclosure coupled to the support structure and including an air outlet;
- (iii) an air filter housed in the enclosure;
- (iv) a fan operatively coupled to the enclosure;
- and
- (b) a unidirectional flow screen having a downstream side defined along a single plane, the flow screen being positioned to cover the fan filter unit outlet and spaced away from and parallel to the filter, the unidirectional flow screen comprising:
- (v) at least one layer of polymeric fabric having a weave pattern with pore sizes of 50-250 micrometers, the at least one layer being constructed and arranged to provide only unidirectional filtered air flow from the fan filter unit across the flow screen such that the filtered air flows to the work area in a single direction with generally parallel air streamlines;
- (c) wherein cross-contamination of the filtered air flow by particulates present in the surrounding unfiltered air is less than that of an air filtration system having a fan filter unit without a unidirectional flow screen.
Dependencies are inferred from the claim text.