Blower filter device, respirator system and method

A respirator system comprising:

• a breathing mask with a discharge valve;
• and
• a blower filter device comprising:
• an air inlet for an inflow of unfiltered air and an air outlet for a discharge of filtered air;
• a blower unit for the aspiration of air through the air inlet, the blower unit comprising a blower motor and a blower sensor, wherein the blower sensor is designed for detecting at least one operating parameter of the blower motor;
• a filter unit for receiving a filter for filtering the aspirated air;
• an air flow sensor for detecting at least one flow parameter of the air flowing through the blower unit;
• and
• a control unit designed to control the blower motor as a function of the at least one flow parameter and the at least one operating parameter, wherein the blower unit of the blower filter device is designed to discharge the air flowing through the air outlet of the blower filter device to the breathing mask, wherein the control unit controls the blower motor, such that an overpressure is generated in the breathing mask compared to an ambient pressure.

A method for operating a blower filter device, the method comprising the steps of:

• providing the blower filter device such that it comprises an air inlet for an inflow of unfiltered air and an air outlet for a discharge of filtered air, a blower unit for the aspiration of air through the air inlet, the blower unit comprising a blower motor and a blower sensor, wherein the blower sensor is designed for detecting at least one operating parameter of the blower motor, a filter unit for receiving a filter for filtering the aspirated air, a sensor for detecting at least one flow parameter of the air flowing through the blower unit and a control unit;
• aspirating air by means of the blower unit with the blower motor;
• determining at least one operating parameter of the blower motor;
• filtering the aspirated air;
• determining a flow parameter of the filtered air;
• controlling the blower motor with the control device as a function of the operating parameter and of the flow parameter.