Fan filter system for potentially explosive areas and method for operating a fan filter device
A filtering device and filter technology, which is applied to emergency protection circuit devices, mechanical equipment, life-saving equipment, etc. for limiting overcurrent/overvoltage, can solve problems such as high current, high power, and increased air suction pressure, and achieve Effects of ensuring stable operation, ensuring fatigue strength, and reducing the risk of arcing
Active Publication Date: 2020-11-20
DRAGER SAFETY
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to their construction, passive respiratory protection devices in principle have the following disadvantage: The air suction pressure is increased due to the internal resistance of the respiratory protection filter
The reason for this is that blower filter devices require high currents and thus high power in order to provide a break-safe function
Method used
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Embodiment Construction
[0079] figure 1 It shows by way of example how the blower filter device 3 according to the invention can be constructed. The following components are arranged in the housing 4:
[0080] - a blower unit 5 comprising a fan wheel, an electric motor and a not shown DC / AC converter for the electric motor;
[0081] - an operating element 19 with which the user can switch the blower unit 5 on and off;
[0082] - a filter receptacle 14 capable of accommodating a filter cartridge (Filterpatrone) 15;
[0083] - an internal energy storage unit 7, which in this embodiment comprises two capacitors;
[0084] - a housing unit 8 capable of housing a mobile voltage supply unit in the form of an accumulator pack 2;
[0085] - an energy connection 9 with two electrical contact points 9.1, 9.2;
[0086] - a voltage sensor 16 capable of measuring the current charging voltage of the internal energy storage unit 7;
[0087] - a connection sensor 17 which can determine whether the accumulator p...
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The invention relates to a fan filter device (3) that can be connected to a power supply unit (2), and a method for operating such a fan filter device (3). The fan filter device (3) comprises a fan unit (5), a filter receptacle (14), an internal energy storage unit (2), an energy interface (9), a current limiting device (13), a sensor arrangement (16, 17, 18) and a control device (6). The currentlimiting device (13) is activated at least when the energy interface is disconnected from the power supply unit (2). The activated current limiting device (13) limits the amperage from the energy interface (9) to the internal energy storage unit (7). As soon as the power supply unit (2) is connected to the energy storage unit (7) and a predefined deactivating event has been detected, the control device (6) deactivates the current limiting device (13). This deactivating event is based on the charging voltage of the internal energy storage unit (7) and / or on the period of time elapsed since theconnection was established.
Description
technical field [0001] The invention relates to a blower filter device (Geblaese filter geraet), which can be connected to a voltage supply unit; a blower filter system with such a blower filter device and a voltage supply unit; And a method for operating such a blower filter device. Background technique [0002] Passive respiratory protection devices with respiratory protection filters are known which are worn by the user in front of him and which provide the user with protection from harmful or toxic gases, particles, etc. Influence. Due to their design, passive respirators basically have the disadvantage that the air suction pressure increases due to the internal resistance of the respirator filter. [0003] In order to avoid this disadvantage, blower filter devices are used, which reduce the breathing resistance compared with passive respiratory protection devices and thus enable or at least improve long-term, non-exhaustive use. [0004] Common blower-type filtering ...
Claims
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IPC IPC(8): A62B7/10A62B9/00F04D25/06H02H9/00H02J7/00
CPCH02H9/00A62B7/10H02J7/00304F04D25/0673F04D27/008A62B18/006H02H9/004F04D27/001H02H9/008H02H9/06
Inventor A·福尔默M·舒尔策
Owner DRAGER SAFETY