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US 10,774,846 B2Granted
Portable, low-power air filtration system
AssigneeDesign West Technologies, Inc.
InventorsRyan Hur, Bob Olson, Jeffrey Kim, Gary Chen, Ramesh Palanisamy
Life of this patent
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Abstract
An air filtration system is described that is suited for CBRN and ColPro applications, and has an integrated inertial particle separator (IPS) and scavenge fan blower as a pre-dust/particle filter, a variable speed fan blower, and a filter housing that mounts two gas-particulate filter sets. The variable speed fan blower, managed by a motor control unit and motor speed algorithm, automatically adjusts its speed to maintain constant air flow regardless of its altitude.
Claims6
A fan blower for providing chemically and/or biologically filtered air, comprising:
- a blower enclosure having an air inlet, an air outlet, and an internal cavity;
- and,
- a fan assembly positioned within said internal cavity to move air from said air inlet out through said air outlet;
- said fan assembly comprising a mixed flow fan and a permanent magnet motor coupled to and driving rotation of said mixed flow fan;
- an atmospheric pressure sensor in communication with ambient air outside said fan blower;
- a static air pressure sensor in communication with said internal cavity;
- a first chemical and biological agent sensor;
- a microprocessor configured to adjust a speed of said fan assembly based on sensor readings of said atmospheric pressure sensor and sensor readings of said static air pressure sensor;
- and said microprocessor being configured to trigger an alarm based on data from said first chemical and biological agent sensor;
- an inertial particle separator disposed adjacent to, and upstream of said mixed flow fan;
- and,
- a scavenge fan connected to said inertial particle separator that removes separated, particle-containing air from said inertial particle separator;
- said scavenge fan further comprising an exhaust tube having an outer, open end positioned outside of said fan blower, so as to expel said particle-containing air from said fan blower.
10 more elements
Dependencies are inferred from the claim text.