Electrically enhanced air filter with coated ground electrode
OwnerRandal D. Leiserinventor
Life of this patent
Estimating the term…
Abstract
An electrostatically stimulated air filtering device includes a dielectric filter material having an inlet side and an opposed outlet side for filtering out contaminants in an air stream directed through the device. A grounded control electrode is positioned upstream of the filter material, and an ionizer electrode is positioned between the control electrode and the filter material. A flexible ground electrode is positioned downstream of the filter material, the ground electrode being comprised of an electrically conductive painted coating confined to and in planar contact with the outlet side of the filter material.
Claims13
An electrically enhanced air filtering device comprising:
- a dielectric filter material having an inlet side and an outlet side for filtering out contaminants in an air stream directed through the device;
- a grounded control electrode positioned upstream of the filter material;
- an ionizer electrode positioned between the control electrode and the filter material;
- and
- a flexible ground electrode positioned downstream of the filter material, the ground electrode being comprised of an electrically conductive painted coating confined to and in planar contact with the outlet side of the filter material.
In an electronic air cleaner having a dielectric filter material for entrapping contaminants in an air stream drawn through the filter material, a ground electrode positioned downstream of the filter material, an ionizer electrode positioned upstream of the filter material and a grounded control electrode positioned upstream of the ionizer electrode, the improvement wherein:
- the ground electrode is constructed and arranged in the form of a conductive coating applied exclusively to downstream tips of the filter material to define a flexible, substantially planar, continuous surface integrally attached to the filter material, and
- the filter material is uncoated internally relative to the downstream tips thereof.
An electrically enhanced filtering device comprising:
- a dielectric filter material having an inlet side and an opposed outlet side for filtering out contaminants in an air stream directed through the device, the filter material being associated with a grounded control electrode positioned upstream thereof, an ionizer electrode positioned between the filter material and the control electrode, and a flexible ground electrode positioned downstream of the filter material, the ground electrode being comprised of electrically conductive coating confined to and in planar contact with only the outlet side of the filter material;
- an inner housing for holding filter material, the inner housing having a conductive member engagable with the conductive coating on the filter material;
- and
- an outer housing for slidably receiving the inner housing, the outer housing having a grounded member engagable with the conductive member on the inner housing.
A method of filtering out contaminants in a moving air stream, the method comprising the steps of:
- providing a filter having an upstream side and a downstream side for filtering out the contaminants passing in the air stream;
- providing a grounded control electrode positioned upstream of the filter;
- providing an ionizer electrode positioned between the control electrode and the filter;
- and
- providing a flexible ground electrode positioned downstream of the filter, the ground electrode being comprised of an electrically conductive coating confined to and in planar contact with the downstream side of the filter.
Dependencies are inferred from the claim text.