Research on the air supply adjustment technology of breath-following powered air-purifying respirators.

ABSTRACT: In the hope of reducing the air supply flow of the powered air-purifying respirator (PAPR) and extending the service life of the filter, a breath-following powered air-purifying respirator (BF-PAPR) that can dynamically adjust the air supply flow according to the breathing flow is proposed. The BF-PAPR changes the air supply flow by adjusting the speed of the variable-frequency centrifugal fan according to the air velocity at the half mask outlet (v_hm) monitored by the modular wind speed transmitter. In the study, the air supply flow adjustment model of the BF-PAPR is developed. It is found that the filtration resistance barely influences v_hm. In addition, under the same mean inhalation flow, the minimum outlet air velocity increases first and then decreases with the

SUBMITTER: Teng G 

PROVIDER: S-EPMC10374598 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature