US 4,737,173 A · Room air treatment system

Abstract

A room air treatment system in which air is drawn through a large particle prefilter, a first carbon filter, a second dual honeycomb matrix carbon filter in which the honeycomb cells in adjacent matrices are offset relative to one another, a blower mounted on vibration isolation mounts and is expelled by the blower into a plenum from when it exits upwardly through a fine particle HEPA filter and finally out through a final filter which is a combination fine particle filter and carbon filter. A filter change warning system is provided which includes a 3500 hour filter change indicator, an every 7000 hour filter change indictor, a back-up warning indicator, a mute button for muting the warning indicator and a recycle system for restarting the hour count.

Claims35

Dependent claims

A room air treatment system comprising:

a cabinet having an air inlet and an air outlet;
a large particle prefilter located generally at said inlet;
carbon filter means located in said cabinet downstream from said prefilter for absorbing odorous and other chemical gases;
blower means located in said cabinet downstream from said carbon filter means for drawing air through said prefilter and said carbon filter means;
fine particle filter means located in said cabinet downstream from said blower means in air flow communication therewith whereby said blower means forces air through said fine particle filter means;
and
a final filter comprising a combination carbon filter and fine particle filter whereby odorous and other chemical gases and particles passing through or escaping earlier entrapment in said fine particle filter means are entrapped by said final filter.

4 more elements

Dependencies are inferred from the claim text.

Room air treatment system

Life of this patent

Room air treatment system

Life of this patent

Abstract

Claims35