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EP1722865A1 - Blow filter device - Google Patents

Blow filter device

Info

Publication number
EP1722865A1
EP1722865A1 EP05714914A EP05714914A EP1722865A1 EP 1722865 A1 EP1722865 A1 EP 1722865A1 EP 05714914 A EP05714914 A EP 05714914A EP 05714914 A EP05714914 A EP 05714914A EP 1722865 A1 EP1722865 A1 EP 1722865A1
Authority
EP
European Patent Office
Prior art keywords
mask
motor
filter device
blower
width modulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05714914A
Other languages
German (de)
French (fr)
Other versions
EP1722865B1 (en
Inventor
Frank Becker
Detlef Kielow
Martin Weber
Michael Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MSA Auer GmbH
Original Assignee
MSA Auer GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MSA Auer GmbH filed Critical MSA Auer GmbH
Publication of EP1722865A1 publication Critical patent/EP1722865A1/en
Application granted granted Critical
Publication of EP1722865B1 publication Critical patent/EP1722865B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/006—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort with pumps for forced ventilation
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/04—Hoods

Definitions

  • the invention relates to a blower filter device for respiratory protection hoods and masks, which comprises a blower driven by a motor and at least one filter upstream of the blower, and control electronics assigned to the motor for setting a predetermined air volume flow.
  • Blower filter devices for respiratory protection hoods and masks are used to provide a wearer of a hood or mask with filtered breathing air in an environment contaminated by gases or particles by means of a blower.
  • the known arrangements use a blower that transports air through a filter through a hose into the hood or mask. When using these devices, they change during use, e.g. operating conditions due to filter contamination. This makes it necessary to adjust the fan speed in order to keep the volume flow of breathing air into the hood or mask constant.
  • Various arrangements are known for adapting the volume flow.
  • EP 0352938 A2 an arrangement of two pressure sensors is used, one of which is located in front of the blower and one behind the blower, in order to measure the differential pressure and thus to control the blower speed.
  • EP 0621056 AI suggests measuring the back pressure behind the blower filter device, the back pressure generated by the flow resistance of the hood serving as a measure of the air volume flow.
  • DE 19502360 AI describes a solution in which the power of the fan is regulated by measuring the operating current and the rotational speed of the motor.
  • a similar method is also used in WO02 / 23298 AI, the rotor speed being controlled via the energy consumption of the motor, that is to say depending on the change in resistance due to the filter, the motor output must be continuously readjusted by means of a complex voltage and current adjustment.
  • the essence of the invention is the use of an electronically commutated direct current motor assigned to the blower, which is controlled by the control electronics with a pulse width modulation ratio as a control variable for generating a specific motor speed and a corresponding air volume flow, specifically in the hood operating mode with a pulse width modulation ratio read out from a calibration curve stored in the control electronics, which reflects the relationship between filter resistances, engine speeds, pulse width modulation ratios and air volumes, in accordance with the respective input resistance in a calibration mode when the device is switched on based on the measured speed and Mask operation with a constant pulse width odulation ratio stored in the control electronics and corresponding to the respective mask type, the control electronics with H Using one of the connection points between the respirator mask or hood (hereinafter referred to as the head part) and the blower filter device, the sensor system that is connected recognizes the head part (hood or mask or mask type) connected and automatically sets the respective control mode.
  • the control electronics with H Using one of the connection points between the respirator mask or hood
  • the DC motor is controlled with a specific value of the pulse width modulation ratio and the resulting motor speed is compared with values from a calibration curve which is stored in a memory. From this, the value of the input resistance of the filter can be determined under the current conditions.
  • blower filter device is advantageous over the known solutions of the prior art insofar as, after connecting the respective head part and after switching on the blower, it is independent of the size of the input resistance prevailing on the blower in accordance with the type, number or
  • the electronic control system for monitoring the air volume flow is a display unit for signaling the exceeding or falling below it the required air flow rate within specified limits flow m i n ⁇ Flow ⁇ Flow IT, ax assigned net, and if the filter resistance has changed in the hood operating mode, the electronically commutated DC motor can be controlled after switching it off and on again and automatically recalibrated with a new pulse width modulation ratio that corresponds to the changed filter resistance and is read from the calibration curve.
  • the display unit can comprise optical and / or acoustic signal elements.
  • the identification means for recognizing the respectively connected head part is a sensor system integrated in an air outlet connection of the blower filter device and connected to the control electronics, which communicates with differently designed hose connections of the respiratory protection hood or the respirator mask or different respirator masks and the control electronics a corresponding one Signal for hood or mask operating mode or different mask operating modes transmitted.
  • the sensor system can have a switch which, when the hose connection piece of a respiratory protection hood is connected, has a specific switching position for the hood operating mode and another when a respiratory protection mask is connected
  • Adopts switching position for setting the mask operating mode in the control electronics wherein an actuating element for setting the switch for the mask operating mode can be arranged in the hose connector of the respiratory mask, and the actuating element can be designed differently according to the respective mask type and the switch for mask operation with a pulse width modulation stored in the control electronics, each mask type specific ratio can be adjustable in different, each mask type-specific positions.
  • the switch for signaling the respective mask type and setting the respective pulse width modulation ratio can be designed with multiple poles.
  • the blower filter device 1 comprises a housing 2 for various filter inserts 3, 4, control electronics 5, a motor 6 that drives a blower 7, and a connection 8 for a connecting hose 9 to a respiratory protection hood 10. Ambient air is drawn in by the blower 7 and flows through the filter inserts 3, 4 and via the connecting hose 9 formed with a connecting part 11 into the respiratory protection hood 10 and is available to a user as cleaned air.
  • the control electronics 5 comprises an accumulator 12
  • the control electronics 5 Since a respirator mask or hood is operated in different operating modes, the control electronics 5 must recognize whether a respirator mask or - as in the exemplary embodiment - a respirator hood 10 is connected.
  • the air outlet connection 8 on the blower filter device 1 has an identification switch 19 which is electrically connected to the control electronics 5.
  • the control electronics 5 indicate whether the air outlet connection 8 is connected to a respirator hood 10 or a respirator mask.
  • the motor in the blower filter device 1 is operated as an electronically commutated DC motor 6.
  • a pulse width modulated signal is used for the control, the pulse width modulation ratio being determined by a ratio of signal on time t1 to signal off time t2.
  • This pulse width modulation ratio (PWM) is used as a control variable and essentially determines the engine speed and thus the fan speed and the air volume flow.
  • the engine speed n is inversely proportional to the amount of air conveyed and depends on the input resistance of the filter inserts 3, 4. If the input resistance of the filter changes Inserts 3, 4, for example due to contamination or the use of different filters, the motor speed and the volume flow change with the set pulse width modulation ratio in an inversely proportional relationship to one another. In order to keep the volume flow constant when the input resistance changes, the engine speed must be changed by changing the pulse width modulation ratio.
  • a value table or calibration curve is stored in the memory 14 of the control electronics, which shows the relationship between pulse width modulation ratio (PWM), engine speed (n), filter resistance and air volume flow.
  • PWM pulse width modulation ratio
  • n engine speed
  • filter resistance filter resistance
  • the device is put into operation with the on / off switch 18.
  • the control electronics 5 has received a signal from the air outlet connection 8 (blower outlet) based on the identification switch 19 in a certain switching position that a respiratory protection hood 10 is connected.
  • an automatic calibration process is carried out.
  • the DC motor 6 is operated with a fixed pulse width modulation. ratio controlled.
  • the resulting motor speed ni is measured via the Hall sensors 21 present in the DC motor 6.
  • the filter resistance ie the sum of the filter resistances from the filter inserts (gas filter 3, particle filter 4), can thus be determined on the basis of the calibration curve stored in the memory 14.
  • the value for the pulse width modulation ratio is then determined from the calibration curve stored in the memory 14, at which the engine speed (working speed n 2 ) adjusts so that the desired air volume flow (here 135 1 / min) results.
  • the DC motor 6 is driven with this pulse width modulation ratio.
  • the set motor speed n 2 is continuously measured during operation by the Hall sensors 21 present in the DC motor 6.
  • a speed range n m i n ⁇ n ⁇ n m a ⁇ is defined in the control electronics 5, which defines the permissible working range. If the input resistance of the filter inserts 3, 4 changes, for example due to contamination (high resistance) or due to a leak in the output area (low resistance), the engine speed n becomes correspondingly higher or lower. If the measured value for the engine speed n 2 is outside the defined working range, the control electronics 5 triggers an alarm, since the volume flow no longer has the desired value at an engine speed outside the working range.
  • the table below shows an example of the working speeds and the associated working ranges with different pulse width modulation ratios.
  • the alarm is displayed by means of the display unit 15 with optical signal elements 16 and / or acoustic signal elements 17.
  • the alarm signals the wearer of the respirator to a change in the conditions to which the wearer must react by either triggering another calibration process by switching it off and then on again, which sets a new engine speed using a new pulse width modulation ratio in order to restore the desired volume flow or by cleaning or changing the filter inserts 3, 4.
  • the blower filter device 1 previously used in connection with a respirator hood can also be operated with a respirator mask.
  • the actuating element 20 actuates the identification switch 19 and thus signals the control electronics 5 that the respirator mask 1 is intended to supply a respirator mask with blown air.
  • the respirator mask in contrast to the respirator hood, lies tightly against the face of the user and is sealed against the outside atmosphere by the exhalation valve even when there is a negative pressure in the mask, only cleaned air reaches the user through filter inserts 3, 4.
  • the DC motor 6 of the blower filter device 1 can have a constant pulse width modulation ratio, and that can be controlled independently of the input resistance of the filter inserts 3, 4. The calibration described above for hood operation in mask operation is therefore not necessary.
  • the identification switch 19 can have several switching positions in connection with the actuating element 20 in order to recognize different mask types with different inherent resistances and to send a corresponding signal to the control electronics 5. Depending on the connected mask type, a previously determined value stored in the memory 14 can be set for the pulse width modulation ratio corresponding to the mask type.
  • sensors for identifying the various head parts for the respective operation of the control electronics can also be arranged at the blower outlet.
  • Blower filter device Housing Filter insert / gas filter Filter insert / particle filter Control electronics DC motor, electronically commutated Blower Air outlet connection (blower outlet) Connection hose head section (here respiratory protection hood) Hose connection piece Accumulator Processor Memory Display unit Optical signal elements Acoustic signal elements Switch on / off Identification switch Actuating element for 19 Hall sensors

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Toxicology (AREA)
  • Pulmonology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Cookers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

A blow filter device for breathing masks and hoods, comprising a blower which is driven by a motor and at least one filter which is arranged upstream from the blower, in addition to an electronic control system for adjusting a predefined airflow volume. The invention is characterized in that the motor is an electronically commutated direct current motor (6) which is controlled with the aid of a pulse width modulation ratio as a control variable, wherein a calibrating curve is created and stored in the memory (14) of the electronic control system and is based on a plurality of different filter resistances and a respectively corresponding pulse-width modulation ratio (PWM) and the respective motor speed (n) for a specific volume of air. The direct current motor can be controlled in the hood mode according to the speed (n) measured in relation to the respective filter resistance after activation with the aid of the associated pulse-width modulation ratio read from the calibrating curve and can be controlled in the mask mode independently of the respective filter resistance with a respective specific constant pulse-width modulation ratio (PWM) for the associated mask type, wherein the electronic control system (5) is associated with an identifying means (19,20) which is used to recognize the associated head part and to adjust the operational mode concerned.

Description

Gebläsefiltergerät PAPR
Beschreibungdescription
Die Erfindung betrifft ein Gebläsefiltergerät für Atem- schutzhauben und -masken, das ein von einem Motor angetriebenes Gebläse und mindestens ein dem Gebläse vorgeschaltetes Filter sowie eine dem Motor zugeordnete Steuerelektronik zur Einstellung eines vorgegebenen Luftvolu- menstromes umfasst.The invention relates to a blower filter device for respiratory protection hoods and masks, which comprises a blower driven by a motor and at least one filter upstream of the blower, and control electronics assigned to the motor for setting a predetermined air volume flow.
Gebläsefiltergeräte für Atemschutzhauben und -masken werden verwendet, um einem Träger einer Haube oder Maske gefilterte Atemluft in einer durch Gase oder Partikel kon- taminierten Umgebung mit Hilfe eines Gebläses zur Verfügung zu stellen. Die bekannten Anordnungen verwenden ein Gebläse, das Luft durch ein Filter hindurch über einen Schlauch in die Haube oder Maske transportiert . Beim Einsatz dieser Geräte ändern sich während der Benutzung, z.B. durch Filterverschmutzung die Betriebsbedingungen. Das macht eine Anpassung der Gebläsedrehzahl erforderlich, um den Volumenstrom der Atemluft in die Haube oder Maske konstant halten zu können. Für die Anpassung des Volumenstromes sind verschiedene Anordnungen bekannt.Blower filter devices for respiratory protection hoods and masks are used to provide a wearer of a hood or mask with filtered breathing air in an environment contaminated by gases or particles by means of a blower. The known arrangements use a blower that transports air through a filter through a hose into the hood or mask. When using these devices, they change during use, e.g. operating conditions due to filter contamination. This makes it necessary to adjust the fan speed in order to keep the volume flow of breathing air into the hood or mask constant. Various arrangements are known for adapting the volume flow.
In der EP 0352938 A2 wird eine Anordnung von zwei Drucksensoren verwendet, von denen sich einer vor dem Gebläse und einer hinter dem Gebläse befindet, um den Differenzdruck zu messen und damit die Gebläsedrehzahl zu steuern.In EP 0352938 A2 an arrangement of two pressure sensors is used, one of which is located in front of the blower and one behind the blower, in order to measure the differential pressure and thus to control the blower speed.
Die EP 0621056 AI schlägt die Messung des Staudrucks hinter dem Gebläsefiltergerät vor, wobei der durch den Strömungswiderstand der Haube erzeugte Staudruck als Maß für den Luftvolumenstrom dient. Diese Lösungen sind insofern nachteilig, als die Verwendung von Drucksensoren konstruktiv und apparativ aufwändig und letztlich mit hohen Kosten verbunden ist.EP 0621056 AI suggests measuring the back pressure behind the blower filter device, the back pressure generated by the flow resistance of the hood serving as a measure of the air volume flow. These solutions are disadvantageous in that the use of pressure sensors is complex in terms of design and equipment and ultimately involves high costs.
Die DE 19502360 AI beschreibt eine Lösung, bei der durch Messung des Betriebsstromes und der Rotationsgeschwindigkeit des Motors die Leistung des Gebläses reguliert wird. Eine ähnliche Methode wird auch in der WO02/23298 AI verwendet, wobei die Rotorgeschwindigkeit über den Energie- verbrauch des Motors gesteuert wird, das heißt in Abhängigkeit von der Widerstandsänderung durch die Filter muss die Motorleistung durch eine aufwändige Spannungs- und Stromanpassung kontinuierlich nachgeregelt werden.DE 19502360 AI describes a solution in which the power of the fan is regulated by measuring the operating current and the rotational speed of the motor. A similar method is also used in WO02 / 23298 AI, the rotor speed being controlled via the energy consumption of the motor, that is to say depending on the change in resistance due to the filter, the motor output must be continuously readjusted by means of a complex voltage and current adjustment.
Eine weitere Möglichkeit zur Steuerung des Luftvolumenstromes wird in der WO 02/11815A1 beschrieben. Bei dieser Anordnung wird die Gebläsedrehzahl über die Motorleistung eines Gleichstrommotors eingestellt. Die Motorleistung wird so eingestellt, dass mit den schwergängigsten Fil- tern der geforderte Volumenstrom erreicht wird. Für die Einstellung ist eine monatliche Grundkalibrierung ohne Filter sowie für jedes verwendete Filter eine manuelle Neukalibrierung notwendig. Mit dem bekannten Strömungswiderstand eines an Stelle der Haube an das Gebläsefilter- gerät anzuschließenden Luftstromindikators kann die Gebläsedrehzahl bestimmt werden, die für einen bestimmten Volumenstrom nötig ist. Der Nachteil dieses Verfahrens besteht darin, dass bei veränderten Bedingungen eine Neukalibrierung notwendig wird. Dazu muss der Benutzer das Gebläsefiltergerät von der Haube trennen und den Luftstromindikator anschließen. Bei leichtgängigen Filtern ist eine Nachregelung von Hand erforderlich. Außerdem kann das Gerät nicht mit einer Maske betrieben werden. Der Erfindung liegt daher die Aufgabe zugrunde, ein Gebläsefiltergerät für Atemschutzmasken und Atemschutzhau- ben zu schaffen, das einfach und kostengünstig ausgebildet ist und eine praktikable Benutzung ermöglicht.A further possibility for controlling the air volume flow is described in WO 02 / 11815A1. With this arrangement, the fan speed is adjusted via the motor power of a DC motor. The engine power is set so that the required volume flow is achieved with the most difficult filters. A monthly basic calibration without a filter and manual recalibration for each filter used are required for the setting. With the known flow resistance of an air flow indicator to be connected to the blower filter device instead of the hood, the blower speed that is necessary for a specific volume flow can be determined. The disadvantage of this method is that a recalibration is necessary when the conditions change. To do this, the user must disconnect the blower filter device from the hood and connect the airflow indicator. Manual adjustment is required for smooth-running filters. In addition, the device cannot be operated with a mask. The invention is therefore based on the object of providing a blower filter device for respirator masks and respirator hoods which is simple and inexpensive and which enables practical use.
Erfindungsgemäß wird die Aufgabe mit einem gemäß den Merkmalen des Patentanspruchs 1 ausgebildeten Gebläsefiltergerät gelöst. Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung ergeben sich aus den Unteran- Sprüchen.According to the invention, the object is achieved with a fan filter device designed according to the features of patent claim 1. Advantageous further developments and refinements of the invention result from the subclaims.
Bei einem Gebläsefiltergerät der eingangs erwähnten Art besteht der Kern der Erfindung in der Anwendung eines dem Gebläse zugeordneten elektronisch kommutierten Gleich- strommotors, der von der Steuerelektronik mit einem Puls- weitenmodulationsverhältnis als Steuergröße zur Erzeugung einer bestimmten Motordrehzahl und eines entsprechenden Luftvolumenstromes gesteuert wird, und zwar im Haubenbetriebsmodus mit einem aus einer in der Steuerelektronik hinterlegten Kalibrierkurve, die den Zusammenhang zwischen Filterwiderständen, Motordrehzahlen, Pulsweitenmo- dulationsverhältnissen und Luftvolumina widerspiegelt, entsprechend dem jeweiligen Eingangswiderstand in einem Kalibriermodus beim Einschalten des Gerätes auf der Basis der gemessenen Drehzahl ausgelesenen Pulsweitenmodulati- onsverhältnis und im Maskenbetrieb mit einem in der Steuerelektronik gespeicherten, dem jeweiligen Maskentyp entsprechenden konstanten Pulsweiten odulationsverhältnis, wobei die Steuerelektronik mit Hilfe einer der Anschluss- stelle zwischen Atemschutzmaske oder -haube (im folgenden als Kopfteil bezeichnet) und Gebläsefiltergerät zugeordneten Sensorik das jeweils angeschlossene Kopfteil (Haube oder Maske bzw. Maskentyp) erkennt und den jeweiligen Steuermodus automatisch einstellt. Bei dem im Haubenbetriebsmodus nach dem Einschalten des Gerätes durchgeführten Kalibriervorgang wird der Gleichstrommotor mit einem bestimmten Wert des Pulsweitenmodu- lationsverhältnisses angesteuert und die resultierende Motordrehzahl mit Werten aus einer Kalibrierkurve, die in einem Speicher hinterlegt ist, verglichen. Daraus kann der Wert des Eingangswiderstandes der Filter unter den aktuellen Bedingungen bestimmt werden.In a blower filter device of the type mentioned at the outset, the essence of the invention is the use of an electronically commutated direct current motor assigned to the blower, which is controlled by the control electronics with a pulse width modulation ratio as a control variable for generating a specific motor speed and a corresponding air volume flow, specifically in the hood operating mode with a pulse width modulation ratio read out from a calibration curve stored in the control electronics, which reflects the relationship between filter resistances, engine speeds, pulse width modulation ratios and air volumes, in accordance with the respective input resistance in a calibration mode when the device is switched on based on the measured speed and Mask operation with a constant pulse width odulation ratio stored in the control electronics and corresponding to the respective mask type, the control electronics with H Using one of the connection points between the respirator mask or hood (hereinafter referred to as the head part) and the blower filter device, the sensor system that is connected recognizes the head part (hood or mask or mask type) connected and automatically sets the respective control mode. In the calibration process carried out in the hood operating mode after the device has been switched on, the DC motor is controlled with a specific value of the pulse width modulation ratio and the resulting motor speed is compared with values from a calibration curve which is stored in a memory. From this, the value of the input resistance of the filter can be determined under the current conditions.
Das erfindungsgemäße Gebläsefiltergerät ist gegenüber den bekannten Lösungen des Standes der Technik insofern vorteilhaft, als es nach dem Anschließen des jeweiligen Kopfteils und nach dem Einschalten des Gebläses unabhängig von der Größe des am Gebläse jeweils herrschenden Eingangswiderstandes entsprechend der Art, Anzahl oderThe blower filter device according to the invention is advantageous over the known solutions of the prior art insofar as, after connecting the respective head part and after switching on the blower, it is independent of the size of the input resistance prevailing on the blower in accordance with the type, number or
Zusetzung der vorgeschalteten Filter sowohl im Haubenbetrieb als auch im Maskenbetrieb, und zwar auch bei unterschiedlichen Maskentypen, automatisch den erforderlichen optimalen Luftvolumenstrom zur Verfügung stellt. Wenn sich der Filterwiderstand während des Haubenbetriebes ändert und ein Grenzwert des erforderlichen Volumenstromes unterschritten wird, muss das Gebläsefiltergerät lediglich aus- und wiedereingeschaltet werden, um anschließend wieder die gewünschte Luftmenge zu liefern. Das Gerät ist daher einfach und komfortabel zu handhaben und zudem einfach und kostengünstig ausgebildet. Da das Gerät ständig unter optimalen Betriebsbedingungen arbeitet, erhöht sich die Lebensdauer der verwendeten Filter.Addition of the upstream filter both in hood operation and in mask operation, even with different mask types, automatically provides the required optimal air volume flow. If the filter resistance changes during hood operation and the required volume flow falls below the limit, the blower filter device only needs to be switched off and on again in order to deliver the desired air volume again. The device is therefore easy and convenient to use and is also simple and inexpensive. Since the device works constantly under optimal operating conditions, the lifespan of the filters used is increased.
In weiterer Ausgestaltung der Erfindung ist der Steuerelektronik zur Überwachung des Luftvolumenstromes eine Anzeigeeinheit zur Signalisierung des Über- oder Unter- schreitens des erforderlichen Luftvolumenstromes innerhalb festgelegter Grenzwerte Flowmin<Flow<FlowIT,ax zugeord- net, und bei im Haubenbetriebsmodus zwischenzeitlich verändertem Filterwiderstand ist der elektronisch kommutier- te Gleichstrommotor nach dem Aus- und Wiedereinschalten und einer damit automatisch verbundenen Neukalibrierung mit einem dem geänderten Filterwiderstand entsprechenden, aus der Kalibrierkurve ausgelesenen neuen Pulsweitenmodu- lationsverhältnis steuerbar. Die Anzeigeeinheit kann optische und/oder akustische Signalelemente umfassen.In a further embodiment of the invention, the electronic control system for monitoring the air volume flow is a display unit for signaling the exceeding or falling below it the required air flow rate within specified limits flow m i n <Flow <Flow IT, ax assigned net, and if the filter resistance has changed in the hood operating mode, the electronically commutated DC motor can be controlled after switching it off and on again and automatically recalibrated with a new pulse width modulation ratio that corresponds to the changed filter resistance and is read from the calibration curve. The display unit can comprise optical and / or acoustic signal elements.
Gemäß einer vorteilhaften Weiterbildung der Erfindung ist das Identifizierungsmittel zum Erkennen des jeweils angeschlossenen Kopfteiles eine in einem Luftauslassanschluss des Gebläsefiltergerätes integrierte und mit der Steuerelektronik verbundene Sensorik, die mit unterschiedlich ausgebildeten Schlauchanschlussstücken der Atemschutzhau- be oder der Atemschutzmaske oder unterschiedlicher Atemschutzmasken kommuniziert und der Steuerelektronik ein entsprechendes Signal für den Hauben- oder Maskenbetriebsmodus oder unterschiedliche Maskenbetriebsmodi ü- bermittelt.According to an advantageous development of the invention, the identification means for recognizing the respectively connected head part is a sensor system integrated in an air outlet connection of the blower filter device and connected to the control electronics, which communicates with differently designed hose connections of the respiratory protection hood or the respirator mask or different respirator masks and the control electronics a corresponding one Signal for hood or mask operating mode or different mask operating modes transmitted.
Die Sensorik kann einen Schalter, der beim Anschließen des Schlauchanschlussstückes einer Atemschutzhaube eine bestimmte Schaltstellung für den Haubenbetriebsmodus und beim Anschließen einer Atemschutzmaske eine andereThe sensor system can have a switch which, when the hose connection piece of a respiratory protection hood is connected, has a specific switching position for the hood operating mode and another when a respiratory protection mask is connected
Schaltstellung zur Einstellung des Maskenbetriebsmodus in der Steuerelektronik einnimmt, umfassen, wobei in dem Schlauchanschlussstück der Atemschutzmaske ein Betätigungselement zur Einstellung des Schalters für den Mas- kenbetriebsmodus angeordnet sein kann, und das Betätigungselement entsprechend dem jeweiligen Maskentyp unterschiedlich ausgebildet sein kann und der Schalter für den Maskenbetrieb mit einem in der Steuerelektronik hinterlegten, jeweils maskentypspezifischen Pulsweitenmodulati- onsverhältnis in unterschiedliche, jeweils maskentypspe- zifische Positionen einstellbar sein kann.Adopts switching position for setting the mask operating mode in the control electronics, wherein an actuating element for setting the switch for the mask operating mode can be arranged in the hose connector of the respiratory mask, and the actuating element can be designed differently according to the respective mask type and the switch for mask operation with a pulse width modulation stored in the control electronics, each mask type specific ratio can be adjustable in different, each mask type-specific positions.
In weiterer Ausgestaltung der Erfindung kann der Schalter zur Signalisierung des jeweiligen Maskentyps und Einstellung des jeweiligen Pulsweitenmodulationsverhältnisses mehrpolig ausgebildet sein.In a further embodiment of the invention, the switch for signaling the respective mask type and setting the respective pulse width modulation ratio can be designed with multiple poles.
Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung, in deren einziger Figur ein mit einer Atemschutzhaube verbundenes Gebläsefiltergerät mit einer zugehörigen Steuerelektronik dargestellt ist, näher erläutert .An embodiment of the invention is explained in more detail with reference to the drawing, in the single figure of which a blower filter device connected to a respiratory protection hood is shown, with associated control electronics.
Das Gebläsefiltergerät 1 umfasst ein Gehäuse 2 für verschiedene Filtereinsätze 3, 4, eine Steuerelektronik 5, einen Motor 6, der ein Gebläse 7 antreibt, und einen An- schluss 8 für einen Verbindungsschlauch 9 zu einer Atemschutzhaube 10. Umgebungsluft wird durch das Gebläse 7 angesaugt und strömt durch die Filtereinsätze 3, 4 und über den mit einem Anschlussteil 11 ausgebildeten Verbindungsschlauch 9 in die Atemschutzhaube 10 und steht einem Benutzer als gereinigte Luft zur Verfügung.The blower filter device 1 comprises a housing 2 for various filter inserts 3, 4, control electronics 5, a motor 6 that drives a blower 7, and a connection 8 for a connecting hose 9 to a respiratory protection hood 10. Ambient air is drawn in by the blower 7 and flows through the filter inserts 3, 4 and via the connecting hose 9 formed with a connecting part 11 into the respiratory protection hood 10 and is available to a user as cleaned air.
Die Steuerelektronik 5 umfasst einen Akkumulator 12 zurThe control electronics 5 comprises an accumulator 12
Energieversorgung, einen Prozessor 13, einen Speicher 14, eine Anzeigeeinheit 15 mit optischen und akustischen Signalelementen 16, 17 sowie einen Schalter 18 zum Ein- und Ausschalten des Gebläsefiltergerätes 1.Power supply, a processor 13, a memory 14, a display unit 15 with optical and acoustic signal elements 16, 17 and a switch 18 for switching the fan filter device 1 on and off.
Da eine Atemschutzmaske bzw. -haube in jeweils unterschiedlichem Betriebsmodus betrieben wird, muss die Steuerelektronik 5 erkennen, ob gerade eine Atemschutzmaske oder - wie im Ausführungsbeispiel - eine Atemschutzhaube 10 angeschlossen ist. Zu diesem Zweck weist der Luftauslassanschluss 8 am Gebläsefiltergerät 1 einen Identifizierungsschalter 19 auf, der mit der Steuerelektronik 5 elektrisch verbunden ist. In Abhängigkeit von seiner Lage (geschlossen oder offen) wird in der Steuerelektronik 5 angezeigt, ob der Luftauslassanschluss 8 mit einer Atemschutzhaube 10 oder einer Atemschutzmaske verbunden ist. Während bei einer Atemschutzmaske in dem entsprechenden Anschlussteil des Verbindungsschlauchs ein Betätigungs- element 20 (hier strichliert dargestellt) zum Schließen des Schalters 19 ausgebildet ist, fehlt bei dem hier dargestellten Schlauchanschlussstück 11 für eine Atemschutzhaube 10 ein derartiges Betätigungselement, so dass der Schalter 19 beim Aufstecken des Schlauchanschlussstückes 11 in der geöffneten Stellung bleibt. In der Steuerelektronik 5 wird nun ein der jeweiligen Schalterstellung entsprechendes Signal zur Identifizierung des jeweils angeschlossenen Kopfteiles erzeugt.Since a respirator mask or hood is operated in different operating modes, the control electronics 5 must recognize whether a respirator mask or - as in the exemplary embodiment - a respirator hood 10 is connected. For this purpose, the air outlet connection 8 on the blower filter device 1 has an identification switch 19 which is electrically connected to the control electronics 5. Depending on its position (closed or open), the control electronics 5 indicate whether the air outlet connection 8 is connected to a respirator hood 10 or a respirator mask. While in the case of a respirator mask an actuating element 20 (shown here in dashed lines) for closing the switch 19 is formed in the corresponding connecting part of the connecting tube, the actuating element 20 shown here for a respirator hood 10 lacks such an actuating element, so that the switch 19 when plugged on of the hose connector 11 remains in the open position. A signal corresponding to the respective switch position for identifying the respectively connected head part is now generated in the control electronics 5.
Der Motor im Gebläsefiltergerät 1 wird als elektronisch kommutierter Gleichstrommotor 6 betrieben. Zur Ansteue- rung wird ein pulsweitenmoduliertes Signal verwendet, wobei das Pulsweitenmodulationsverhältnis bestimmt ist durch ein Verhältnis von Signal-An-Zeit tl zu Signal-Aus- Zeit t2. Dieses Pulsweitenmodulationsverhältnis (PWM) wird als Steuergröße verwendet und bestimmt im Wesentlichen die Motordrehzahl und damit die Gebläsedrehzahl und den Luftvolumenstrom.The motor in the blower filter device 1 is operated as an electronically commutated DC motor 6. A pulse width modulated signal is used for the control, the pulse width modulation ratio being determined by a ratio of signal on time t1 to signal off time t2. This pulse width modulation ratio (PWM) is used as a control variable and essentially determines the engine speed and thus the fan speed and the air volume flow.
Bei einem mit einer Atemschutzhaube betriebenen Gebläsefiltergerät ist zu bemerken, dass sich die Motordrehzahl n umgekehrt proportional zur geförderten Luftmenge verhält und vom Eingangswiderstand der Filtereinsätze 3,4 abhängt. Ändert sich der Eingangswiderstand der Filter- einsätze 3,4, beispielsweise durch Verschmutzung oder Verwendung von verschiedenen Filtern, so ändern sich bei dem eingestellten Pulsweitenmodulationsverhältnis die Motordrehzahl und der Volumenstrom in einem umgekehrt pro- portionalen Verhältnis zueinander. Um den Volumenstrom bei einer Änderung des Eingangswiderstandes aber konstant halten zu können, muss die Motordrehzahl durch Änderung des Pulsweitenmodulationsverhältnisses verändert werden.In the case of a blower filter device operated with a respiratory protection hood, it should be noted that the engine speed n is inversely proportional to the amount of air conveyed and depends on the input resistance of the filter inserts 3, 4. If the input resistance of the filter changes Inserts 3, 4, for example due to contamination or the use of different filters, the motor speed and the volume flow change with the set pulse width modulation ratio in an inversely proportional relationship to one another. In order to keep the volume flow constant when the input resistance changes, the engine speed must be changed by changing the pulse width modulation ratio.
Um der Atemschutzhaube bei verändertem Eingangswiderstand mit einer pulsweitenmodulierten Motorsteuerung bei unterschiedlichem bzw. sich veränderndem Eingangswiderstand dennoch den erforderlichen optimalen Luftvolumenstrom von beispielsweise 135 + 7 1/min zuzuführen, ist in dem Spei- eher 14 der Steuerelektronik eine Wertetabelle oder Kalibrierkurve hinterlegt, die den Zusammenhang zwischen Pulsweitenmodulationsverhältnis (PWM) , Motordrehzahl (n) , Filterwiderstand und Luftvolumenstrom widerspiegelt. Zur Aufstellung der Kalibrierkurve werden für einen bestimm- ten Luftvolumenstrom, beispielsweise 135 1/min, die den unterschiedlichen Filterwiderständen jeweils entsprechenden Steuergrößen (Pulsweitenmodulationsverhältnisse) ermittelt.In order to supply the required optimal air volume flow of, for example, 135 + 7 1 / min to the respiratory protection hood when the input resistance changes with a pulse-width-modulated motor control with different or changing input resistance, a value table or calibration curve is stored in the memory 14 of the control electronics, which shows the relationship between pulse width modulation ratio (PWM), engine speed (n), filter resistance and air volume flow. To set up the calibration curve, the control variables (pulse width modulation ratios) corresponding to the different filter resistances are determined for a specific air volume flow, for example 135 1 / min.
Das Gerät wird mit dem Ein-/Ausschalter 18 in Betrieb genommen. Gemäß dem vorliegenden Ausführungsbeispiel hat die Steuerelektronik 5 nach dem Anschließen des Schlauchanschlussstücks 11 einer Atemschutzhaube 10 von dem Luft- auslassanschluss 8 (Gebläseausgang) aufgrund des in einer bestimmten Schaltstellung stehenden Identifizierungsschalters 19 ein Signal empfangen, dass eine Atemschutzhaube 10 angeschlossen ist. In diesem Fall wird ein automatischer Kalibriervorgang durchgeführt. Der Gleichstrommotor 6 wird mit einem festgelegten Pulsweitenmodulati- onsverhältnis angesteuert. Die resultierende Motordrehzahl ni wird über die im Gleichstrommotor 6 vorhandenen Hall-Sensoren 21 gemessen. Damit kann anhand der im Speicher 14 abgelegten Kalibrierkurve der Filterwiderstand, d.h. die Summe der Filterwiderstände aus den Filtereinsätzen (Gasfilter 3, Partikelfilter 4) bestimmt werden. Mit diesem Eingangswiderstand wird aus der im Speicher 14 abgelegten Kalibrierkurve dann der Wert für das Pulsweitenmodulationsverhältnis bestimmt, bei dem sich die Motordrehzahl (Arbeitsdrehzahl n2) so einstellt, dass sich der gewünschte Luftvolumenstrom (hier 135 1/min) ergibt. Mit diesem Pulsweitenmodulationsverhältnis wird der Gleichstrommotor 6 angesteuert.The device is put into operation with the on / off switch 18. According to the present exemplary embodiment, after connecting the hose connector 11 of a respiratory protection hood 10, the control electronics 5 has received a signal from the air outlet connection 8 (blower outlet) based on the identification switch 19 in a certain switching position that a respiratory protection hood 10 is connected. In this case, an automatic calibration process is carried out. The DC motor 6 is operated with a fixed pulse width modulation. ratio controlled. The resulting motor speed ni is measured via the Hall sensors 21 present in the DC motor 6. The filter resistance, ie the sum of the filter resistances from the filter inserts (gas filter 3, particle filter 4), can thus be determined on the basis of the calibration curve stored in the memory 14. With this input resistance, the value for the pulse width modulation ratio is then determined from the calibration curve stored in the memory 14, at which the engine speed (working speed n 2 ) adjusts so that the desired air volume flow (here 135 1 / min) results. The DC motor 6 is driven with this pulse width modulation ratio.
Die eingestellte Motordrehzahl n2 wird im Betrieb durch die im Gleichstrommotor 6 vorhandenen Hall-Sensoren 21 ständig gemessen. Zu der einem bestimmten Eingangswiderstand entsprechenden Motordrehzahl wird in der Steuerelektronik 5 ein Drehzahlbereich nmin<n<nmaχ festgelegt, der den zulässigen Arbeitsbereich definiert. Ändert sich der Eingangswiderstand der Filtereinsätze 3,4, beispielsweise durch Verschmutzung (hoher Widerstand) oder durch eine Undichtigkeit im Ausgangsbereich (geringer Widerstand) , so wird die Motordrehzahl n entsprechend größer oder kleiner. Liegt der gemessene Wert für die Motordrehzahl n2 außerhalb des definierten Arbeitsbereichs, so wird durch die Steuerelektronik 5 ein Alarm ausgelöst, da bei einer Motordrehzahl außerhalb des Arbeitsbereiches der Volumenstrom nicht mehr den gewünschten Wert auf- weist. In der nachfolgenden Tabelle sind beispielhaft die Arbeitsdrehzahlen und die zugehörigen Arbeitsbereiche bei verschiedenen Pulsweitenmodulationsverhältnissen dargestellt. The set motor speed n 2 is continuously measured during operation by the Hall sensors 21 present in the DC motor 6. For the engine speed corresponding to a certain input resistance, a speed range n m i n <n <n m aχ is defined in the control electronics 5, which defines the permissible working range. If the input resistance of the filter inserts 3, 4 changes, for example due to contamination (high resistance) or due to a leak in the output area (low resistance), the engine speed n becomes correspondingly higher or lower. If the measured value for the engine speed n 2 is outside the defined working range, the control electronics 5 triggers an alarm, since the volume flow no longer has the desired value at an engine speed outside the working range. The table below shows an example of the working speeds and the associated working ranges with different pulse width modulation ratios.
Der Alarm wird mittels der Anzeigeeinheit 15 mit optischen Signalelementen 16 und/oder akustischen Signalelementen 17 angezeigt. Der Alarm signalisiert dem Träger des Atemschutzgerätes eine Veränderung der Bedingungen, auf die der Träger reagieren muss, indem er entweder durch Aus- und wieder Einschalten einen weiteren Kalibriervorgang auslöst, der durch ein neues Pulsweitenmodu- lationsverhältnis eine neue Motordrehzahl einstellt, um den gewünschten Volumenstrom wiederherzustellen oder indem er die Filtereinsätze 3, 4 reinigt bzw. wechselt.The alarm is displayed by means of the display unit 15 with optical signal elements 16 and / or acoustic signal elements 17. The alarm signals the wearer of the respirator to a change in the conditions to which the wearer must react by either triggering another calibration process by switching it off and then on again, which sets a new engine speed using a new pulse width modulation ratio in order to restore the desired volume flow or by cleaning or changing the filter inserts 3, 4.
Das zuvor in Verbindung mit einer Atemschutzhaube benutz- te Gebläsefiltergerät 1 kann auch mit einer Atemschutzmaske betrieben werden. Beim Anschließen des Schlauchanschlussstücks einer Atemschutzmaske wird mit dem Betätigungselement 20 der Identifizierungsschalter 19 betätigt und damit der Steuerelektronik 5 signalisiert, dass mit dem Gebläsefiltergerät 1 eine Atemschutzmaske mit Gebläseluft versorgt werden soll. Da die Atemschutzmaske im Gegensatz zur Atemschutzhaube am Gesicht des Benutzers dicht anliegt und auch bei einem in der Maske entstehenden Unterdruck durch das Ausatemventil gegen die Außenat- mosphäre abgedichtet ist, gelangt nur durch die Filtereinsätze 3, 4 gereinigte Luft zum Benutzer. In diesem Fall kann der Gleichstrommotor 6 des Gebläsefiltergerätes 1 mit einem konstanten Pulsweitenmodulationsverhältnis, und zwar unabhängig vom Eingangswiderstand der Filtereinsätze 3, 4 gesteuert werden. Somit ist die oben für den Haubenbetrieb beschriebene Kalibrierung im Maskenbetrieb nicht erforderlich.The blower filter device 1 previously used in connection with a respirator hood can also be operated with a respirator mask. When connecting the hose connector of a respirator mask, the actuating element 20 actuates the identification switch 19 and thus signals the control electronics 5 that the respirator mask 1 is intended to supply a respirator mask with blown air. Since the respirator mask, in contrast to the respirator hood, lies tightly against the face of the user and is sealed against the outside atmosphere by the exhalation valve even when there is a negative pressure in the mask, only cleaned air reaches the user through filter inserts 3, 4. In this case, the DC motor 6 of the blower filter device 1 can have a constant pulse width modulation ratio, and that can be controlled independently of the input resistance of the filter inserts 3, 4. The calibration described above for hood operation in mask operation is therefore not necessary.
Der Identifizierungsschalter 19 kann in Verbindung mit dem Betätigungselement 20 mehrere Schaltstellungen aufweisen, um unterschiedliche Maskentypen mit jeweils unterschiedlichen Eigenwiderständen zu erkennen und ein entsprechendes Signal zur Steuerelektronik 5 zu leiten. Je nach angeschlossenem Maskentyp kann ein vorher bestimmter und im Speicher 14 abgelegter Wert für das dem Maskentyp entsprechende Pulsweitenmodulationsverhältnis eingestellt werden.The identification switch 19 can have several switching positions in connection with the actuating element 20 in order to recognize different mask types with different inherent resistances and to send a corresponding signal to the control electronics 5. Depending on the connected mask type, a previously determined value stored in the memory 14 can be set for the pulse width modulation ratio corresponding to the mask type.
Anstelle des hier beschriebenen Identifizierungsschalters können am Gebläseausgang auch Sensoren zur Identifizierung der verschiedenen Kopfteile für den jeweiligen Betrieb der Steuerelektronik angeordnet sein. Instead of the identification switch described here, sensors for identifying the various head parts for the respective operation of the control electronics can also be arranged at the blower outlet.
Bezugszeichenliste :Reference symbol list:
Gebläsefiltergerät Gehäuse Filtereinsatz / Gasfilter Filtereinsatz / Partikelfilter Steuerelektronik Gleichstrommotor, elektronisch kommutiert Gebläse Luftauslassanschluss (Gebläseausgang) Verbindungsschlauch Kopfteil (hier Atemschutzhaube) Schlauchanschlussstück Akkumulator Prozessor Speicher Anzeigeeinheit optische Signalelemente akustische Signalelemente Schalter Ein/Aus Identifizierungsschalter Betätigungselement für 19 Hall-Sensoren Blower filter device Housing Filter insert / gas filter Filter insert / particle filter Control electronics DC motor, electronically commutated Blower Air outlet connection (blower outlet) Connection hose head section (here respiratory protection hood) Hose connection piece Accumulator Processor Memory Display unit Optical signal elements Acoustic signal elements Switch on / off Identification switch Actuating element for 19 Hall sensors

Claims

Patentansprüche claims
1. Gebläsefiltergerät für Atemschutzmasken und - hauben, das ein von einem Motor angetriebenes Gebläse und mindestens ein dem Gebläse vorgeschaltetes Filter sowie eine dem Motor zugeordnete Steuerelektronik zur Einstellung eines vorgegebenen Luftvolumenstromes umfasst, dadurch gekennzeichnet, dass - der Motor ein mit einem Pulsweitenmodulationsverhaltms (PWM) als Steuergröße gesteuerter und mit Drehzahlsensoren (21) ausgerüsteter e- lektronisch kommutierter Gleichstrommotor (6) ist; wobei - in einem Speicher (14) der Steuerelektronik (5) eine auf der Basis einer Vielzahl unterschiedlicher Filterwiderstände sowie des jeweils entsprechenden Pulsweitenmodulationsver- hältnisses (PWM) und der jeweiligen Motordrehzahl (n) für ein bestimmtes Luftvolumen erstellte Kalibrierkurve hinterlegt ist; - der Gleichstrommotor im Haubenbetrieb entsprechend der nach dem Einschalten mit Bezug auf den jeweiligen Eingangswiderstand gemessenen Drehzahl (n) mit dem aus der Kalibrierkurve ausgelesenen zugehörigen Pulsweitenmodulationsverhaltms steuerbar ist; und - im Maskenbetrieb unabhängig vom jeweiligen Filterwiderstand mit einem konstanten, für den angeschlossenen Maskentyp jeweils spezifischen Pulsweitenmodulationsverhältnis (PWM) steuerbar ist; wobei - der Steuerelektronik (5) ein Identifizie- rungsmittel (19, 20) zum Erkennen des jeweils angeschlossenen Kopfteiles und zur Einstellung des betreffenden Betriebsmodus zugeordnet ist.1. Blower filter device for respiratory masks and hoods, which comprises a blower driven by a motor and at least one filter upstream of the blower as well as control electronics assigned to the motor for setting a predetermined air volume flow, characterized in that the motor has a pulse width modulation behavior (PWM). is an electronically commutated DC motor (6) controlled as a control variable and equipped with speed sensors (21); wherein - in a memory (14) of the control electronics (5) a calibration curve created on the basis of a large number of different filter resistances as well as the respectively corresponding pulse width modulation ratio (PWM) and the respective engine speed (n) is stored for a specific air volume; - The DC motor in hood operation can be controlled in accordance with the speed (n) measured after switching on with reference to the respective input resistance with the associated pulse width modulation behavior read from the calibration curve; and - can be controlled in mask operation independently of the respective filter resistance with a constant pulse width modulation ratio (PWM) which is specific for the connected mask type; - the control electronics (5) are identified by is assigned means (19, 20) for recognizing the respectively connected head part and for setting the relevant operating mode.
2. Gebläsefiltergerät nach Anspruch 1, dadurch gekennzeichnet, dass der Steuerelektronik (5) zur Überwachung des Luftvolumenstromes eine Anzeigeeinheit (15) zur Signalisierung des Überoder Unterschreitens eines vorgegebenen Dreh- zahlbereiches (nmin<n<nmax) zugeordnet ist, und bei im Haubenbetriebsmodus zwischenzeitlich verändertem Eingangswiderstand der Gleichstrommotor (6) nach dem Aus- und Wiedereinschalten und einer damit automatisch verbundenen Neuka- librierung mit einem dem geänderten Eingangswiderstand entsprechenden, aus der Kalibrierkurve ausgelesenen neuen Pulsweitenmodulationsverhaltms steuerbar ist.2. blow filter device according to claim 1, characterized in that the control electronics (5) a display unit (15) falling below a predetermined rotational speed range (n m i n <n <n max) is assigned to monitor the air volume flow for signaling the exceeding or, and If the input resistance in the hood operating mode has changed in the meantime, the DC motor (6) can be controlled after switching off and on again and a recalibration that is automatically connected to it, with a new pulse width modulation ratio that corresponds to the changed input resistance and is read from the calibration curve.
3. Gebläsefiltergerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zur Drehzahlmessung im Gleichstrommotor (6) Hall-Sensoren (21) angeordnet sind.3. Blower filter device according to claim 1 or 2, characterized in that Hall sensors (21) are arranged for speed measurement in the DC motor (6).
4. Gebläsefiltergerät nach Anspruch 2, dadurch gekennzeichnet, dass die Anzeigeeinheit (15) optische und/oder akustische Signalelemente (16, 17) umfasst.4. Blower filter device according to claim 2, characterized in that the display unit (15) comprises optical and / or acoustic signal elements (16, 17).
5. Gebläsefiltergerät nach Anspruch 1, dadurch gekennzeichnet, dass das Identifizierungsmittel zum Erkennen des jeweils angeschlossenen Kopfteiles eine in einen Luftauslassanschluss (8) des Gebläsefiltergerätes (1) integrierte und mit der Steuerelektronik (5) verbundene Sensorik ist, die mit unterschiedlich ausgebildeten Schlauchanschlussstücken (11) der Atemschutzhaube (10) oder der Atemschutzmaske oder unterschiedlicher Atemschutzmasken kommuniziert und der Steuerelektronik (5) ein entsprechendes Signal für den Hauben- oder Maskenbetriebsmodus oder unterschiedliche Maskenbetriebsmodi übermittelt .5. Blower filter device according to claim 1, characterized in that the identification means for recognizing the respectively connected head part is integrated into an air outlet connection (8) of the blower filter device (1) and is connected to the control electronics (5), which communicates with differently designed hose connectors (11) of the respirator hood (10) or the respirator mask or different respirator masks and transmits to the control electronics (5) a corresponding signal for the hood or mask operating mode or different mask operating modes.
6. Gebläsefiltergerät nach Anspruch 5, dadurch gekennzeichnet, dass die Sensorik einen Identifizierungsschalter (19), der beim Anschließen des Schlauchanschlussstückes (11) einer Atemschutz- haube (10) eine bestimmte SchaltStellung für den Haubenbetriebsmodus und beim Anschließen einer Atemschutzmaske eine andere Schaltstellung zur Einstellung des Maskenbetriebsmodus in der Steuerelektronik einnimmt, umfasst.6. Blower filter device according to claim 5, characterized in that the sensor system includes an identification switch (19) which, when connecting the hose connection piece (11) of a respiratory protection hood (10), has a specific switching position for the hood operating mode and when connecting a respiratory mask a different switching position for adjustment of the mask operating mode in the control electronics.
7. Gebläsefiltergerät nach Anspruch 6, dadurch gekennzeichnet, dass in dem Schlauchanschlussstück der Atemschutzmaske ein Betätigungselement (20) zur Einstellung des Identifizierungs- Schalters (19) für den Maskenbetriebsmodus angeordnet ist.7. Blower filter device according to claim 6, characterized in that an actuating element (20) for setting the identification switch (19) for the mask operating mode is arranged in the hose connector of the respirator mask.
8. Gebläsefiltergerät nach Anspruch 7, dadurch gekennzeichnet, dass das Betätigungselement (20) entsprechend dem jeweiligen Maskentyp unterschiedlich ausgebildet und der Identifizierungsschalter (19) für den Maskenbetrieb mit einem in der Steuerelektronik (5) hinterlegten, jeweils maskentypspezifischen Pulsweiten odula- tionsverhältnis in unterschiedliche, jeweils maskentypspezifische Positionen einstellbar ist.8. Blower filter device according to claim 7, characterized in that the actuating element (20) is designed differently in accordance with the respective mask type and the identification switch (19) for mask operation with a pulse type odula stored in the control electronics (5), each mask type-specific. ratio can be set in different positions, each specific to the mask type.
9. Gebläsefiltergerät nach Anspruch 8, dadurch gekennzeichnet, dass der Schalter (19) zur Signalisierung des jeweiligen Maskentyps und Einstellung des jeweiligen Pulsweitenmodulations- verhältnisses mehrpolig ausgebildet ist.9. Blower filter device according to claim 8, characterized in that the switch (19) for signaling the respective mask type and setting the respective pulse width modulation ratio is multi-pole.
10. Gebläsefiltergerät nach Anspruch 1, dadurch gekennzeichnet, dass der Gleichstrommotor (6), die Steuerelektronik (5) und die Anzeigeeinheit (15) über einen Ein-/Ausschalter (18) an einen Akkumulator (12) angeschlossen sind. 10. blower filter device according to claim 1, characterized in that the DC motor (6), the control electronics (5) and the display unit (15) via an on / off switch (18) are connected to an accumulator (12).
EP05714914A 2004-03-11 2005-01-27 Blow filter device Active EP1722865B1 (en)

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DE502005006997D1 (en) 2009-05-14
WO2005087319A1 (en) 2005-09-22
DE102004013453B4 (en) 2006-07-27
US8118025B2 (en) 2012-02-21
AU2005221263B2 (en) 2008-04-10
AU2005221263A1 (en) 2005-09-22
ATE427138T1 (en) 2009-04-15
DE102004013453A1 (en) 2005-10-06
EP1722865B1 (en) 2009-04-01

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