Dräger Safety Ag&co. Kgaa

Drãgerwerk Ag & Co, Kgaa

Martin Schulze

Achim Volmer

Björn Ehler

Jan Schöning

A blower filter device () is connectable to a voltage supply unit () and includes a blower unit (), a filter mount (), an internal energy storage unit (), an energy interface (), a current limitation device (), a sensor array () and a control device (). The current limitation device is activated upon disconnecting the energy interface from the voltage supply unit. The activated current limitation device limits the intensity of a current from the energy interface to the internal energy storage device. Upon the voltage supply unit being connected to the energy storage device and a predefined deactivating event is detected, the control device deactivates the current limitation device. The deactivating event is based on a charging voltage of the internal energy storage unit and/or on a time period that has elapsed since the connection. A process is provided for operating such a blower filter device.

Blower filter device for potentially explosive areas and process for operating a blower filter device

A charging device, for charging a battery pack, can be combined with other charging devices to form a multi-charger. The charging device has an input-side contact element for a power cable or an additional charging device connection. Internally, the charging device has conductors for the electrically conductive connection of the input-side contact element to an output-side contact element and for looping through a power supply voltage in contact with the input-side contact element. A charging device circuit of the charging device is internally connected to the looped-through supply voltage. The charging device circuit includes an input side voltage converter and a charging controller for charging a battery pack. The supply voltage can be converted by the voltage converter into a supply voltage for feeding the charging controller.

Cascadable multi-charger and method for the operation thereof

A blower filter respirator system () has a filter element () for filtering ambient air (), a blower unit () and a face part () with a tube element ()&#x2014;face part/tube combination ()&#x2014;for feeding an amount of breathing air () to a user (). A pressure sensor () is on an outlet side () of the blower unit () measuring breathing air pressure values () by detecting a pressure difference on the outlet side () of the blower unit () against the ambient air (). A control unit () is configured to operate the blower unit () and control breathing air () and is configured to determine a desired pressure value () for current operation with the face part/tube combination () from operation-related properties () of the blower unit () and specific properties of the face part/tube combination () and for comparing with the current pressure value ().

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Munich, Georgia

Martin Schulze