Gas separation: processes – Solid sorption – Organic gas or liquid particle sorbed
Reexamination Certificate
1999-07-20
2001-07-24
Spitzer, Robert H. (Department: 1724)
Gas separation: processes
Solid sorption
Organic gas or liquid particle sorbed
C095S273000, C095S278000, C096S135000, C096S136000, C096S138000, C096S147000, C055S357000, C055S471000, C055S493000, C055S521000
Reexamination Certificate
active
06264727
ABSTRACT:
BACKGROUND OF INVENTION
The present invention relates to the cleaning of indoor air.
In cleaning and removing particulate from indoor air, a proposed solution provides drawing air through a filter by a fan or blower. Various type of filters are used in the air-conditioning HVAC systems or as portable units containing HEPA filters or electronic filters. However, those systems are complex, expensive and require unique parts that greatly increase their expense.
Needs exist for low cost, efficient, portable air filtering systems.
SUMMARY OF THE INVENTION
The present invention is a portable filter fan. A highly efficient, but inexpensive air filtering device is made from a portable box fan with a filter installed on the incoming side. Low-cost large filters on low-cost fans sitting at floor level circulate air, cleaning the air more efficiently than many other filters placed in ceiling or attic areas or in large air handlers. That is because gravity pulls the floating particles in the air downward toward the floor, and the portable box fan draws the particles through the filter and entraps the particles in the filter.
A portable filter fan is created by attaching at least one filter to the incoming side of the fan, which is a portable fan. To attach the filter to the fan, one or two-inch inward opening channels are positioned along the edges and are affixed to the outside of the fan housing. High efficiency pleated filters and micro particle filters have proven effective as filtering media.
In preferred embodiments, the channel above the filter is removable. That permits periodic cleaning of the filtering media.
In one embodiment, an activated charcoal filter is used to remove volatile organic compounds (VOC's) and odors from the air. Activated charcoal is placed in a rack affixed to the inflow side of the fan housing. Since microscopic particles of the charcoal may break off and possibly contaminate the air, a filter attached to the outflow side of the fan filters out those free activated particles. The activated carbon particles entrapped in an exit filter keep operating to remove VOC's and odors from the air.
These and further and other objects and features of the invention are apparent in the disclosure, which includes the above and ongoing written specifications, with the claims and the drawings.
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Creighton Wray James
Narasimhan Meera P.
Spitzer Robert H.
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