METHOD AND APPARATUS FOR MAINTAINING AIRFLOW IN A POWERED AIR PURIFYING RESPIRATOR

METHOD AND APPARATUS FOR MAINTAINING AIRFLOW IN A POWERED AIR PURIFYING RESPIRATOR

A blower/filtration unit for a powered air purifying respirator (PAPR) includes a motor configured to operate according to a motor control algorithm. The blower/filtration unit also includes a first pressure sensor positioned at an inlet of the blower/filtration unit. The blower/filtration unit also...

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Bibliographische Detailangaben
Hauptverfasser: BISSEN, Dale M, KREPEL, Kenneth J, JENSEN, Douglas D, PARHAM, Michael L, MARTINSON, Paul A, POCH, James F
Format: Patent
Sprache:eng
Schlagworte:
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
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Beschreibung
Zusammenfassung:A blower/filtration unit for a powered air purifying respirator (PAPR) includes a motor configured to operate according to a motor control algorithm. The blower/filtration unit also includes a first pressure sensor positioned at an inlet of the blower/filtration unit. The blower/filtration unit also includes a second pressure sensor positioned at an outlet of the blower/filtration unit. The blower/filtration unit also includes a motor controller that executes the motor control algorithm. The motor control algorithm determines a motor speed required to maintain an airflow rate based on signals from the first and second pressure sensors.