Gerald W Martin

US Patent:

61455881, Nov 14, 2000

Filed:

Aug 3, 1998

Appl. No.:

9/128606

Inventors:

Gerald L. Martin - Edina MN
Jon E. Johnson - Plymouth MN
Ephraim E. M. Sparrow - St. Paul MN

Assignee:

XeteX, Inc. - Minneapolis MN

International Classification:

F28F 300

US Classification:

165166

Abstract:

An improved air-to-air, heat-and-moisture exchanger is described which facilitates the simultaneous transfer of both heat and water vapor between two streams of air while greatly inhibiting the transfer of pollutant gases. A rigid encasement supports a stack of flat, thin-film composite membranes that are held in parallel, spaced-apart relation, thereby forming a box-shaped exchanger. The membranes are synthesized by interfacial polymerization, a process whereby a thin, non-porous film may be uniformly deposited onto a porous substrate material. The thin film is hydrophilic so as to provide high water vapor flux together with excellent selectivity against the transfer of other gases and vapors. The substrate provides mechanical support. Each of the parallel sheets of composite membrane in the stack separates two continuously flowing streams of air, one comprised of the air being exhausted from a building and the other comprised of the fresh air brought in to replace the exhausted air, thereby providing simultaneous heat transfer and moisture transfer between the streams while selectively restricting the transfer of the pollutant gases found in the exhaust air.

US Patent:

45507732, Nov 5, 1985

Filed:

Feb 2, 1984

Appl. No.:

6/576352

Inventors:

Gerald L. Martin - Minneapolis MN

Assignee:

EER Products Inc. - Minneapolis MN

International Classification:

F24H 302

US Classification:

165 54

Abstract:

Heat exchanger which is a draw-through, self-contained, central ducted system. Heat exchanger can be used with a furnace or installed separately in any system. Supply and exhaust direct-drive blowers provide air flow against high resistance laminar, straight-thru/non-turbulent air flow of true cross-flow sized elements providing separation of air flow for side-by-side air flow with counter-flow heat transfer. The system is heavy duty, aluminum, cross flow, double-pass heat exchanger. The system includes drain pans and front and back access panels which provides easy access to the heat exchanger for cleaning as required. The electrical parts are on a slide out tray for easy servicing. The heat exchanger can be used in residential, commercial, or industrial environments.