Room air treatment system
US4737173A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jul 3, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2221/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.