公开(公告)号：AU2021379311A9

公开(公告)日：2025-01-09

申请号：AU2021379311

申请日：2021-11-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： JENSEN DOUGLAS D ,  KREPEL KENNETH J ,  POCH JAMES F ,  BISSEN DALE M ,  PARHAM MICHAEL L ,  MARTINSON PAUL A

IPC: A62B18/00

Abstract: 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.