Dräger Safety Ag&co. Kgaa

Marcus Romba

Hans-Ullrich Hansmann

Jürgen Unger

Björn Petersen

Thomas Pernot

Lutz Rüffert

Mohamed Houssem Harbi

Christoph Schmidt

Hermann Hopermann

Sandra Dankertt

A connection module () for installation in a closed breathing circuit of a closed-circuit breathing apparatus (), includes an inlet port (), for connection to a first closed circuit element, an outlet port (), for connection to a second closed circuit element, a maintenance fluid inlet (), and a maintenance fluid outlet (). A maintenance device may be provided with the connection module and a controller () and control module regulated valves (). Maintenance fluid is circulated through the closed breathing circuit by the controller and valves in a state in which the connection module () is installed in the closed-circuit breathing apparatus. A method for maintaining a closed-circuit breathing apparatus includes opening the closed-circuit breathing apparatus at a point, installing the connection module or the maintenance device, and introducing maintenance fluid into the closed breathing circuit of the closed-circuit breathing apparatus through the connection module or the maintenance device.

Connection module, maintenance device and method for maintaining a closed-circuit breathing apparatus

A breathing apparatus includes a filter, a motor and a blower driven by the motor. The filter is disposed ahead of the blower and the blower is configured to generate an air volume flow over the filter. A data storage unit has calibration curves for the air volume flow stored therein and the calibration curves are provided in characteristic line fields referenced to a known ambient pressure (p, p). Each of the characteristic line fields has a reference calibration curve referred to a predetermined operating state. A control unit is connected to the motor and the data storage unit. The control unit is configured to extrapolate one of the characteristic line fields for the operation of the motor by comparing a calibration curve ({dot over (V)}) for an unknown ambient pressure (p) recorded at a predetermined operating state with a reference calibration curve.

Breathing apparatus with compensation of the ambient pressure

Vehicle filter

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Ratzeburg, Germany

Marcus Romba