Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1986-11-20
1988-11-01
Prunner, Kathleen J.
Gas separation
Means within gas stream for conducting concentrate to collector
55138, 55151, 55152, B03C 312, B03C 314
Patent
active
047817364
ABSTRACT:
A conventional HEPA (high efficiency particulate air) filter is provided with a ionizer at its air inlet face to enhance its efficiency. The filter comprises a non-conductive fibrous filter medium sheet formed in a zig-zag or accordian fold. Within each fold of the filter medium is there located a conductive spacer so that the accordian folds are supported and substantially evenly spaced throughout the filter. By virtue of the accordian fold of the filter medium sheet, a series of spacers, forming a first set thereof, each has one of its longitudinal edges exposed at the air inlet face of the filter and the other of its longitudinal edges covered at the air discharge face of the filter. The remaining spacers constitute a second set thereof, each having one of its longitudinal edges exposed at the air discharge face of the filter and the other of its longitudinal edges covered at the air inlet face of the filter. The spacers of the first and second sets alternate, one adjacent the other. The ionizer comprises a plurality of wire-like electrodes and grounded plate-like electrodes arranged alternately and in parallel spaced relationship in a plane perpendicular to the spacers and are positively charged by connection to a high voltage, low current source. The ionizer electrodes are located within charging range of the first set of spacers which are charged by ion flow from the corona of the ionizing electrodes. To create a field between the first set of spacers and the second set of spacers, the spacers of the second set are connected together and to ground. In another embodiment the ionizer is located remotely with respect to one or more HEPA filters and functions to charge the particulate material. A single wire-like electrode is located at each HEPA filter to charge one of its first and second sets of spacers, the other of its first and second sets of spacers being connected to ground.
REFERENCES:
patent: 2352651 (1944-07-01), Meston
patent: 2789657 (1957-04-01), Fields
patent: 2798572 (1957-07-01), Fields
patent: 4266948 (1981-05-01), Teague et al.
patent: 4357150 (1982-11-01), Masuda et al.
patent: 4509958 (1985-04-01), Masuda et al.
Cheney William A.
Spurgin Wendell P.
Prunner Kathleen J.
United Air Specialists Inc.
LandOfFree
Electrostatically enhanced HEPA filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrostatically enhanced HEPA filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatically enhanced HEPA filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-889023