US20230044656A1 - Blower device for a respirator - Google Patents

Blower device for a respirator Download PDF

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Publication number
US20230044656A1
US20230044656A1 US17/787,421 US202017787421A US2023044656A1 US 20230044656 A1 US20230044656 A1 US 20230044656A1 US 202017787421 A US202017787421 A US 202017787421A US 2023044656 A1 US2023044656 A1 US 2023044656A1
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US
United States
Prior art keywords
filter element
fan
conveying channel
airflow
air conveying
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.)
Pending
Application number
US17/787,421
Other languages
English (en)
Inventor
Jonathan Heusser
Robert Buechel
Daniel BLOECHLINGER
Jasper BROUWER
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.)
Optrel Holding AG
Original Assignee
Optrel Holding AG
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 Optrel Holding AG filed Critical Optrel Holding AG
Publication of US20230044656A1 publication Critical patent/US20230044656A1/en
Pending legal-status Critical Current

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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
    • 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
    • A62B18/02—Masks
    • A62B18/025—Halfmasks
    • 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
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/084—Means for fastening gas-masks to heads or helmets
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/10—Respiratory apparatus with filter elements
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/04—Couplings; Supporting frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the invention concerns a blower device for a respiratory protection system.
  • a blower device for a respiratory protection system has already been proposed, with a fan for generating an airflow, with at least one filter element which is configured to be flown through by the airflow, with a housing unit accommodating the fan and the at least one filter element, and with an air conveying channel, which accommodates the filter element and is configured for guiding the airflow between the filter element and the fan.
  • the objective of the invention is in particular to provide a generic device having improved characteristics regarding compactness and comfort.
  • the objective is achieved according to invention by the features of patent claim 1 while advantageous implementations and further developments of the invention may be gathered from the subclaims.
  • the invention is based on a blower device for a respiratory protection system, with a fan for generating an airflow, with at least one filter element which is configured to be flown through by the airflow, with a housing unit accommodating the fan and the at least one filter element, and with an air conveying channel, which accommodates the filter element and is configured for guiding the airflow between the filter element and the fan, wherein the air conveying channel is configured for a deflection of an airflow between the fan and the filter element.
  • the air conveying channel is embodied separately from the housing unit and the at least one filter element is fixedly integrated in the air conveying channel.
  • the air conveying channel is realized by a separate component which is removable from the housing unit.
  • the air conveying channel is in particular realized as an exchangeable component.
  • the housing unit comprises at least two housing shells, the air conveying channel being embodied separately from the housing shells. It would principally be conceivable that the air conveying channel is fixedly connected to an exchangeable cover.
  • the filter element is connected to the air conveying channel directly. The filter element is in particular connected to the air conveying channel while free of an additional, in particular separate, filter housing.
  • the fan is arranged at least partly next to the at least one filter element, the airflow being deflected between the fan and the filter element.
  • the filter element and the fan are arranged in the common housing unit.
  • the blower device is in particular implemented by a compact blower device.
  • the blower device is in particular configured to be worn on the body, like for example on the back and/or on the hip.
  • a “blower device” is in particular, in this context, a device to be understood which is configured for an active generation of an airflow for supplying a user with breathing air.
  • the blower device is in particular configured, in operation, to feed the airflow to a mouth protection device of the respiratory protection system.
  • the blower device is connected to the mouth protection device of the respiratory protection system via at least one breathing air supply line.
  • the blower device is configured, in operation, to suck air from an environment, to purify the air, in particular to filter the air, and to actively feed the purified air to a user, in particular via the mouth protection device.
  • the blower device is configured to generate an active airflow.
  • the blower device is in particular configured to generate an overpressure airflow.
  • the fan is in particular configured, during operation, for an active generation of an airflow.
  • the fan is configured for an active suction of air from an environment and for an active transport of the air to the mouth protection device of the respiratory protection system.
  • the fan is in particular implemented by an axial fan and/or radial fan.
  • a “filter element” is in particular, in this context, an element to be understood which is configured for a filtration of the airflow during operation.
  • the filter element preferably comprises a filter which is during operation flown through by the airflow.
  • the airflow flows completely through the filter of the filter element.
  • the filter element is in particular configured for separating off particles, in particular suspended matter, from the airflow.
  • the filter of the filter element is in particular implemented by an aerosol filter.
  • the filter is embodied as a depth filter or cake filter, in particular as a lamellate filter.
  • the fan being arranged at least partly next to the at least one filter element is in particular to be understood, in this context, that in a direction that is perpendicular to a main extent direction of the fan, the fan is free of being completely covered by the filter element.
  • a normal vector of the main extent plane of the fan which runs through the geometric center of the fan, is free of an intersection point with the filter element.
  • the fan and the filter element are arranged side by side in a main extent plane of the blower device.
  • the fan and the filter element are realized so as to be at least substantially free, in particular completely free, of mutually covering each other.
  • a “main extent plane” of a structural unit is in particular a plane to be understood which is parallel to a largest side surface of a smallest imaginary rectangular cuboid just still completely enclosing the structural unit, and which in particular runs through the center point of the rectangular cuboid.
  • “At least substantially” is in particular to mean, in this context, that a deviation from a given value is in particular less than 25%, preferably less than 10% and particularly preferentially less than 5% of the given value.
  • “Configured” is in particular to mean specifically programmed, designed and/or equipped. By an object being configured for a certain function is in particular to be understood that the object fulfills and/or executes said certain function in at least one application state and/or operation state.
  • air conveying channel is in particular to mean, in this context, a component which forms a channel and is configured for guiding air.
  • the air conveying channel is configured to at least section-wise delimit the airflow.
  • the air conveying channel in particular forms a guiding channel that is configured to guide the airflow, wherein the air conveying channel is in particular configured for a defined deflection of the airflow.
  • the air conveying channel forms a deflection between the filter element and the fan.
  • the deflection may be implemented, for example, as a curve, as a curvature, as a bend or the like.
  • a flow-in axis and/or a flow-in direction of the airflow into the air conveying channel is substantially different and/or substantially offset from a flow-out axis and/or a flow-out direction of the airflow out of the guiding channel.
  • the filter element being fixedly integrated in the air conveying channel” is in particular to be understood, in this context, that the filter element is fixedly connected to the air conveying channel.
  • the filter element is connected to the air conveying channel in an at least substantially non-releasable manner.
  • “In an at least substantially non-releasable manner” is here in particular to mean a connection of at least two elements which are separable from each other only with the assistance of separating tools, like for example a saw, in particular a mechanical saw, etc., and/or chemical separation agents, like for example solving agents, etc.
  • the airflow between the fan and the filter element is deflected by at least 50°, preferably by at least 90°, preferentially by at least 140° and particularly preferentially by at least 180°.
  • airflow being deflected between the fan and the filter element is in particular to be understood, in this context, that during operation of the blower device, the airflow changes direction on its way between the filter element and the fan, in particular within the air conveying channel.
  • a “direction” of the airflow is in particular to mean, in this context, an averaged movement direction of the particles of the airflow in one point.
  • the air conveying channel which is configured for guiding the airflow, is at least partially arranged between the filter element and the fan, the air conveying channel being configured for a defined deflection of the airflow.
  • the air conveying channel forms a deflection between the filter element and the fan.
  • the deflection may be realized, for example, as a curve, as a curvature, as a bend or the like.
  • a flow-in axis and/or a flow-in direction of the airflow into the air conveying channel is substantially different and/or substantially offset from a flow-out axis and/or a flow-out direction of the airflow out of the air conveying channel.
  • the implementation according to the invention in particular allows providing an advantageously compact, in particular flat, blower device.
  • a direct coupling of the air conveying channel and the filter element is obtainable.
  • a close fitting-in of the filter element is achievable in an advantageously simple manner. It is in particular possible to do without additional sealings and frames.
  • an advantageously low construction height of the blower device is achievable.
  • this in particular enables an advantageously simple exchange of the filter element.
  • the filter element is in particular advantageously exchangeable together with the air conveying channel.
  • the air conveying channel and the at least one filter element form a filter exchange module.
  • the air conveying channel and the at least one filter element are implemented as an exchangeable filter exchange module, which is exchanged as a unit for an exchange of the filter element.
  • a “filter exchange module” is in particular to mean, in this context, an exchangeable module, in particular mounting module. It is preferably to be understood as an exchangeable module comprising several components which are configured for being pre-mounted to form a unit, which is then mounted as a whole in a further unit, in particular in the blower device. Preferably the entire filter exchange module is exchanged during an exchange. This in particular enables an advantageously simple exchange of the filter element.
  • the filter element is in particular advantageously exchangeable together with the air conveying channel.
  • the at least one filter element is connected to the air conveying channel at least partly by substance-to-substance bond.
  • the at least one filter element is glued with the air conveying channel.
  • “Connected by substance-to-substance bond” is in particular to mean that the mass particles are held together by atomic forces or molecular forces, which is the case, for example, with soldering, welding, gluing and/or vulcanizing. This in particular enables a direct coupling of the air conveying channel and the filter element.
  • close fitting-in of the filter element is achievable in an advantageously simple manner. It is in particular possible to do without additional sealings and frames.
  • an advantageously simple exchange of the filter element is achievable in this way.
  • the filter element is in particular advantageously exchangeable together with the air conveying channel.
  • the air conveying channel forms a filter frame of the at least one filter element.
  • the air conveying channel is configured for a positioning and/or a stabilization of the filter element.
  • the filter element is realized so as to be free of a frame of its own.
  • the filter of the filter element is introduced directly into the air conveying channel.
  • the filter of the filter element is glued directly into the air conveying channel. This in particular allows providing an advantageously compact, in particular flat, blower device.
  • a flow-in direction of the airflow into the air conveying channel is substantially different from a flow-out direction of the airflow out of the air conveying channel.
  • the air conveying channel has an inlet opening, wherein the flow-in direction extends perpendicularly to a plane of the inlet opening.
  • a flow-in direction of the airflow into the air conveying channel extends perpendicularly to a main extent plane of the filter element.
  • the air conveying channel further comprises an outlet opening, wherein the flow-out direction runs perpendicularly to a plane of the outlet opening.
  • the flow-in direction in particular defines an averaged direction of the airflow when entering the air conveying channel.
  • the flow-out direction in particular defines an averaged direction of the airflow when exiting the air conveying channel.
  • an angle included by the flow-in direction of the airflow into the air conveying channel and the flow-out direction of the airflow out of the air conveying channel amounts to more than 40°, preferably to more than 60° and particularly preferentially to more than 80°.
  • the air conveying channel has an inlet opening and an outlet opening, an opening cross section of the inlet opening being essentially larger than an opening cross section of the outlet opening.
  • a surface area of the opening cross section of the inlet opening is at least twice as large as a surface area of the opening cross section of the outlet opening.
  • a surface area of the opening cross section of the inlet opening is at least three times, preferably at least four times and particularly preferentially at least five times as large as a surface area of the opening cross section of the outlet opening.
  • the surface area of the opening cross section of the inlet opening is in particular at least approximately equivalent to a surface area of the filter element in the main extent plane of the filter element.
  • the opening cross section of the inlet opening extends parallel to a main extent plane of the filter element. In this way in particular an advantageous air guidance is achievable. It is thus in particular possible to provide an advantageously compact, in particular flat-built, blower device.
  • the blower device comprises a further filter element, which is situated next to the fan and is fixedly integrated in the air conveying channel.
  • the further filter element is arranged next to the fan and/or next to the one filter element, and its flow-through direction of the airflow differs from a flow-through direction of the airflow through the fan and/or the filter element.
  • the further filter element is arranged next to the fan.
  • the flow-through direction of the airflow through the further filter element differs from a flow-through direction through the fan.
  • the air conveying channel, the filter element and the further filter element form a filter exchange module, in particular an alternative filter exchange module.
  • the air conveying channel, the filter element and the further filter element are realized as an exchangeable filter exchange module, which is exchanged as a unit for an exchange of the filter element.
  • different filter exchange modules can be inserted, depending on an application.
  • the filter exchange module or the alternative filter exchange module can be inserted. This in particular enables an advantageously simple exchange of the filter element.
  • the filter element is in particular advantageously exchangeable together with the air conveying channel.
  • the housing unit has a thickness of less than 70 mm.
  • the housing unit has a thickness of less than 50 mm.
  • the housing unit in particular serves for a protection and an orientation of the fan and the filter element.
  • the blower device further comprises an energy storage for an energy supply of the fan, which is also accommodated in the housing unit.
  • a “thickness” of the housing unit is in particular to mean, in this context, a maximum extent of the housing unit perpendicularly to a main extent plane of the housing unit. In this way it is in particular possible to provide an advantageously compact blower device.
  • the fan is configured to create a volume flow of the airflow of at least 50 l/min and maximally 250 l/min.
  • the fan is configured to create a volume flow of the airflow of at least 80 l/min and maximally 120 l/min. This in particular allows providing an advantageously compact, high-performance blower device.
  • the invention is furthermore based on a respiratory protection system, in particular a blower respiratory protection system, with the blower device and with at least one mouth protection device.
  • a respiratory protection system in particular a blower respiratory protection system
  • the at least one blower device is configured to create an overpressure in the mouth protection device.
  • the at least one blower device is configured to create a relative overpressure in the mouth protection device with respect to an environment.
  • a “respiratory protection system” is in particular to mean, in this context, a system with a blower device and with a mouth protection device, which is configured to actively provide an airflow for a breathing air supply of a user.
  • the respiratory protection system is in particular configured, during operation, to create by means of a blower device an airflow which is fed to the mouth protection device of the respiratory protection system.
  • the blower device is connected to the mouth protection device of the respiratory protection system via at least one breathing air supply line.
  • the respiratory protection system is configured, in operation, to suck air from an environment, to purify the air, in particular to filter the air, and to actively feed the purified air to a user via the mouth protection device.
  • a “mouth protection device” is in particular, in this context, a device to be understood which forms a half-mask and is configured to be worn at least in a user's mouth and nose region.
  • the device is configured to form a breathing zone in front of the user's mouth and/or nose region, which is continuously supplied with breathing air during operation.
  • the mouth protection device is configured to directly supply a user with breathing air and to protect a user's mouth and/or nose region from external influences, in particular from gases, particles and/or suspended matter.
  • the mouth protection device is free of a cover of a user's eyes, in particular a user's eye region.
  • the mouth protection device comprises a mask base body, which is configured to cover a user's mouth and/or nose region and which delimits a breathing zone at least partly, and comprises at least one breathing air supply line, which is connected with the mask base body and delimits at least one breathing air channel that ends in the breathing zone and is configured for guiding an active breathing air flow. This in particular allows providing an advantageously comfortable respiratory protection system. In particular, a reliable breathing air supply is enabled.
  • blower device according to the invention and/or the respiratory protection system shall not be limited to the application and implementation described above.
  • the blower device according to the invention and/or the respiratory protection system may comprise a number of individual elements, components and units that differs from a number given here.
  • values situated within the limits mentioned shall also be considered as disclosed and as applicable according to requirements.
  • FIG. 1 a respiratory protection system with a blower device, with a mouth protection device, with a vest and with an external operating unit and a user, in a schematic illustration
  • FIG. 2 the blower device of the respiratory protection system in a schematic illustration
  • FIG. 3 the blower device of the respiratory protection system with a fan and with a filter element, in a schematic sectional view along the section line II-II,
  • FIG. 4 the mouth protection device of the respiratory protection system and a user's head, in a schematic illustration
  • FIG. 5 the mouth protection device of the respiratory protection system in a schematic partial sectional view
  • FIG. 6 a portion of the mouth protection device of the respiratory protection system, in a schematic sectional view
  • FIG. 7 an alternative blower device of a respiratory protection system with a fan, with a filter element and with a further filter element, in a schematic sectional view.
  • FIG. 1 shows a respiratory protection system 10 a .
  • the respiratory protection system 10 a is realized by a blower respiratory protection system.
  • the respiratory protection system 10 a is in particular realized by a blower respiratory protection system of safety class TH3.
  • the respiratory protection system 10 a is configured for a protection of a user 18 a from particles like smoke, aerosols and/or dust.
  • the respiratory protection system 10 a is in addition capable of protecting from unpleasant smells and noxious ozone. It is in particular conceivable that in environments with Examlubrious or even toxic gases, the respiratory protection system 10 a protects the user 18 a from organic, inorganic and/or acidic gases.
  • the respiratory protection system 10 a comprises a blower device 14 a and a mouth protection device 12 a .
  • the blower device 14 a is configured to generate a breathing air flow 26 a .
  • the blower device 14 a is configured to generate a breathing air flow 26 a for the mouth protection device 12 a.
  • the blower device 14 a comprises a housing unit 58 a .
  • the housing unit 58 a is realized by a plastic housing.
  • the housing unit 58 a comprises two housing shells 70 a , 72 a , namely a first housing shell 70 a and a second housing shell 72 a , which are connected to each other.
  • the first housing shell 70 a comprises two openable covers 74 a , 76 a , via which an inner space of the housing unit 58 a can be made accessible.
  • the second housing shell 72 a forms a rear side of the housing unit 58 a , which faces toward the user 18 a in a worn state.
  • the second housing shell 72 a is concavely curved on an outer side.
  • the curvature of the second housing shell 72 a is adapted to a back curvature of a human.
  • the housing unit 58 a further comprises several air inlet openings 78 a .
  • the air inlet openings 78 a are implemented by slits in the first housing shell 70 a .
  • the air inlet openings 78 a serve for suctioning an ambient air via an airflow 50 a .
  • the housing unit 58 a comprises an air outlet opening 80 a .
  • the air outlet opening 80 a is realized by a tube connection piece at the first housing shell 70 a .
  • the air outlet opening 80 a serves for an output of the purified airflow 50 a , in particular a breathing air flow 26 a .
  • the breathing air flow 26 a is forwarded from the air outlet opening 80 a to the mouth protection device 12 a ( FIGS. 1 , 2 ).
  • the housing unit 58 a has a thickness d of less than 70 mm.
  • the housing unit 58 a has a thickness d of less than 50 mm.
  • the blower device 14 a further comprises a fan 48 a for a generation of an airflow 50 a .
  • the blower device 14 a is configured for creating an overpressure in the mouth protection device 12 a .
  • the fan 48 a is configured to create an overpressure in the mouth protection device 12 a .
  • the fan 48 a is configured to create a volume flow of the airflow 50 a of at least 50 l/min and maximally 250 l/min.
  • the fan 48 a is configured to create a volume flow of the airflow 50 a of at least 80 l/min and maximally 120 l/min.
  • the blower device 14 a is configured to create in the mouth protection device 12 a , by means of the fan 48 a , a relative overpressure with respect to an environment.
  • the fan 48 a is embodied by an electrical radial fan. However, principally a different implementation, deemed expedient by someone skilled in the art, would also be conceivable.
  • the fan 48 a is arranged in the housing unit 58 a .
  • a main extent plane 56 a of the fan 48 a extends at least substantially parallel to a main extent plane of the housing unit 58 a .
  • the fan 48 a is arranged in an upper region of the blower device 14 a .
  • the air outlet opening 80 a is arranged on an exit side of the fan 48 a .
  • the blower device 14 a further comprises a control and/or regulation unit 86 a for a control and/or regulation of the fan 48 a during operation.
  • the control and/or regulation unit 86 a is in particular configured for an automatic adaption of a performance grade of the fan 48 a .
  • the control and/or regulation unit 86 a is configured to adjust an air flow level of the fan 48 a depending on a saturation of a filter element 52 a .
  • the control and/or regulation unit 86 a is furthermore configured for an automatic airflow control and airflow adaption ( FIG. 3 ).
  • the blower device 14 a also comprises a filter element 52 a .
  • the filter element 52 a is configured to be flown through by the airflow 50 a .
  • the filter element 52 a is implemented by a rectangular-cuboid-shaped filter module.
  • the filter element 52 a is implemented by an aerosol filter.
  • the filter element 52 a is embodied as a depth filter, in particular as a lamellate filter. It would however also be conceivable that the filter element 52 a is implemented as a gas filter, in particular as an A1B1E1 gas filter.
  • the filter element 52 a is arranged in the housing unit 58 a .
  • a main extent plane 54 a of the filter element 52 a extends at least substantially parallel to a main extent plane of the housing unit 58 a .
  • the filter element 52 a is arranged in a lower region of the blower device 14 a .
  • the housing unit 58 a accommodates the fan 48 a and the filter element 52 a .
  • the air inlet opening 78 a is arranged on an entry side of the filter element 52 a .
  • the filter element 52 a is implemented so as to be exchangeable via the cover 74 a .
  • a filter exchange module 110 a with the filter element 52 a is implemented so as to be exchangeable via the cover 74 a ( FIG. 3 ).
  • the fan 48 a is arranged next to the filter element 52 a , the airflow 50 a being deflected between the fan 48 a and the filter element 52 a .
  • the filter element 52 a and the fan 48 a are together arranged in the housing unit 58 a .
  • the blower device 14 a further comprises an air conveying channel 82 a , which accommodates the filter element 52 a and which is configured to guide the airflow 50 a between the filter element 52 a and the fan 48 a .
  • the air conveying channel 82 a is embodied separately from the housing unit 58 a .
  • the housing unit 58 a comprises a receptacle for a defined accommodation of the air conveying channel 82 a .
  • the air conveying channel 82 a is realized so as to be removable from the housing unit 58 a .
  • the air conveying channel 82 a can be inserted in the housing unit 58 a in a defined position. Ina state of the air conveying channel 82 a when inserted in the housing unit 58 a , the air conveying channel 82 a is directly coupled with an entry channel of the fan 48 a .
  • An outlet opening 114 a of the air conveying channel 82 a is coupled with the entry channel of the fan 48 a in a sealing fashion.
  • the air conveying channel 82 a further comprises an inlet opening 112 a and the outlet opening 114 a , an opening cross section of the inlet opening 112 a being essentially larger than an opening cross section of the outlet opening 114 a .
  • a surface area of the opening cross section of the inlet opening 112 a is at least twice as large as a surface area of the opening cross section of the outlet opening 114 a .
  • Preferentially a surface area of the opening cross section of the inlet opening 112 a is at least three times, preferably at least four times and particularly preferentially at least five times as large as a surface area of the opening cross section of the outlet opening 114 a .
  • the surface area of the opening cross section of the inlet opening 112 a is in particular at least approximately equivalent to a surface area of the filter element 52 a in the main extent plane 54 a of the filter element 52 a.
  • the filter element 52 a is fixedly integrated in the air conveying channel 82 a .
  • the air conveying channel 82 a and the filter element 52 a form the filter exchange module 110 a .
  • the filter exchange module 110 a is implemented so as to be exchangeable as a whole via the cover 74 a .
  • the filter element 52 a is at least partly connected to the air conveying channel 82 a by substance-to-substance bond.
  • the filter element 52 a is glued into the air conveying channel 82 a .
  • the filter element 52 a is glued into the air conveying channel 82 a in a region of the inlet opening 112 a .
  • the air conveying channel 82 a forms a filter frame of the filter element 52 a .
  • the air conveying channel 82 a is configured for a positioning and a stabilization of the filter element 52 a .
  • the filter of the filter element 52 a is directly introduced in the air conveying channel 82 a.
  • the filter element 52 a is arranged along the airflow 50 a fluidically upstream of the fan 48 a .
  • the airflow 50 a between the fan 48 a and the filter element 52 a is deflected by at least approximately 90°.
  • a deflection of the airflow 50 a is brought about in the air conveying channel 82 a .
  • a flow-through direction r 1 of the airflow 50 a through the filter element 52 a is substantially different from a flow-through direction r 2 of the airflow 50 a through the fan 48 a .
  • the flow-through direction r 2 of the airflow 50 a through the fan 48 a runs parallel to the main extent plane 56 a of the fan 48 a .
  • the flow-through direction r 2 of the airflow 50 a runs through the fan 48 a perpendicularly to the main extent plane 56 a of the fan 48 a .
  • the flow-through direction r 1 of the airflow 50 a through the filter element 52 a runs perpendicularly to the main extent plane 54 a of the filter element 52 a .
  • the flow-through direction r 1 of the filter element 52 a is angled by at least approximately 90° with respect to the flow-through direction r 2 of the fan 48 a .
  • the air conveying channel 82 a is configured for a deflection of an airflow 50 a between the fan 48 a and the filter element 52 a .
  • the air conveying channel 82 a has a bent air guidance.
  • a flow-in direction r L1 of the airflow 50 a into the air conveying channel 82 a is substantially different from a flow-out direction r L2 of the airflow 50 a out of the air conveying channel 82 a .
  • An angle included by the flow-in direction r L1 of the airflow 50 a into the air conveying channel 82 a and the flow-out direction r L2 of the airflow 50 a out of the air conveying channel 82 a amounts to at least approximately 90° ( FIG. 3 ).
  • the filter element 52 a has the main extent plane 54 a .
  • the fan 48 a has the main extent plane 56 a . It would be conceivable that the main extent plane 54 a extends parallel to the main extent plane 56 a , wherein a distance between the main extent plane 54 a of the filter element 52 a and the main extent plane 56 a of the fan 48 a is smaller than a maximum thickness of the filter element 52 a . Preferentially, in the case of a parallel implementation, a distance between the main extent plane 54 a of the filter element 52 a and the main extent plane 56 a of the fan 48 a would be smaller than 50 mm, preferably smaller than 30 mm and particularly preferentially smaller than 10 mm.
  • the main extent plane 54 a of the filter element 52 a is angled with respect to the main extent plane 56 a of the fan 48 a .
  • An angle included by the main extent plane 54 a of the filter element 52 a and the main extent plane 56 a of the fan 48 a amounts to more than 80°, preferably more than 120° and particularly preferentially more than 160°.
  • the angle included by the main extent plane 54 a of the filter element 52 a and the main extent plane 56 a of the fan 48 a amounts to at least approximately 165°.
  • a normal vector of the main extent plane 54 a of the filter element 52 a that intersects with the filter element 52 a and a normal vector of the main extent plane 56 a of the fan 48 a that intersects with the fan 48 a include a smallest angle of at least approximately 15°.
  • the main extent plane 56 a of the fan 48 a and the main extent plane 54 a of the filter element 52 a include a smallest angle of at least 60°, preferably at least 70°, with an imaginary plane in which the section line between the main extent plane 56 a of the fan 48 a and the main extent plane 54 a of the filter element 52 a runs and which is situated symmetrically between the filter element 52 a and the fan 48 a .
  • a section line of the main extent plane 54 a of the filter element 52 a and the main extent plane 56 a of the fan 48 a runs in a proximity of the filter element 52 a and of the fan 48 a .
  • a smallest distance between the section line and the filter element 52 a is in particular smaller than 15 cm, preferably smaller than 10 cm and particularly preferentially smaller than 5 cm.
  • a smallest distance between the section line and the filter element 52 a is smaller than a smallest distance between the fan 48 a and the filter element 52 a .
  • At least a large portion of normal vectors of the main extent plane 54 a of the filter element 52 a that intersect with the filter element 52 a are free of an intersection point with the fan 48 a .
  • All normal vectors of the main extent plane 54 a of the filter element 52 a that intersect with the filter element 52 a are free of an intersection point with the fan 48 a .
  • the filter element 52 a and the fan 48 a are partially arranged at an angle next to each other ( FIG. 3 ).
  • the blower device 14 a further comprises an energy storage 84 a .
  • the energy storage 84 a is embodied by an accumulator.
  • the energy storage 84 a serves for an energy supply of the fan 48 a .
  • a main extent plane of the energy storage 84 a extends at least substantially parallel to a main extent plane of the housing unit 58 a .
  • the energy storage 84 a is arranged in a lower region of the blower device 14 a .
  • the housing unit 58 a accommodates the fan 48 a , the filter element 52 a and the energy storage 84 a .
  • the housing unit 58 a serves for a protection and an orientation of the fan 48 a , the filter element 52 a and the energy storage 84 a .
  • the energy storage 84 a is implemented such that it is exchangeable via the cover 76 a ( FIG. 3 ).
  • the respiratory protection system 10 a further comprises an external operating unit 62 a .
  • the external operating unit 62 a is embodied by a remote control.
  • the operating unit 62 a comprises operating elements 64 a and a control and/or regulation unit 66 a that is configured for a control and/or regulation of the blower device 14 a .
  • the external operating unit 62 a is connected to the blower device 14 a via a cable 88 a .
  • the control and/or regulation unit 66 a of the external operating unit 62 a is in particular configured to actuate the control and/or regulation unit 86 a of the blower device 14 a depending on an input at the operating elements 64 a .
  • a performance grade of the fan 48 a can be adjusted via the operating elements 64 a .
  • the fan 48 a can be activated or deactivated via the operating elements 64 a .
  • the external operating unit 62 a further comprises a sensor unit 68 a for capturing environmental parameters.
  • the control and/or regulation unit 66 a is configured, in at least one operation state, to control and/or regulate the blower device 14 a on the basis of the environmental parameters.
  • the control and/or regulation unit 66 a is configured, in operation, to actuate the control and/or regulation unit 86 a of the blower device 14 a , a performance grade of the fan 48 a being adapted via the control and/or regulation unit 86 a of the blower device 14 a on the basis of the environmental parameters.
  • the sensor unit 68 a is configured to capture an air quality, an ambient pressure and/or an oxygen concentration.
  • the respiratory protection system 10 a further comprises a vest 60 a that is to be worn by the user 18 a .
  • the vest 60 a is embodied as a textile vest.
  • the blower device 14 a is releasably connected to the vest 60 a .
  • the external operating unit 62 a is moreover configured to be worn by a user on his chest.
  • the external operating unit 62 a is arranged on a front side of the vest 60 a.
  • environmental parameters can be captured by means of the sensor unit 68 a in particular in a head region of the user 18 a.
  • the respiratory protection system 10 a further comprises a breathing air line 46 a , which is connected to the blower device 14 a and is configured for guiding the breathing air flow 26 a .
  • the breathing air line 46 a connects the blower device 14 a to the mouth protection device 12 a .
  • the breathing air line 46 a is connected to the blower device 14 a via the air outlet opening 80 a of the blower device 14 a .
  • the breathing air line 46 a is embodied by a tube. In operation, the breathing air line 46 a is configured for guiding the breathing air flow 26 a.
  • the mouth protection device 12 a comprises a mask base body 16 a .
  • the mask base body 16 a is configured to cover a mouth and nose region of the user 18 a . Beyond this the mask base body 16 a is configured to at least partially delimit a breathing zone 20 a . In operation, the mask base body 16 a delimits the breathing zone 20 a , together with the face of the user 18 a and a separating layer 38 a .
  • the mask base body 16 a is made at least largely of a flexurally soft material.
  • the mask base body 16 a is made completely of a flexurally soft material.
  • the mask base body 16 a is made completely of a dimensionally instable material.
  • the mask base body 16 a is made at least largely of a textile material.
  • the mask base body 16 a is completely made of a textile.
  • the mask base body 16 a is made of a textile.
  • the mask base body 16 a is implemented so as to be at least substantially airtight. It would in particular be conceivable that a textile which the mask base body 16 a is made of has a coating which at least reduces air permeability.
  • the mask base body 16 a is in particular airtight at least at an absolute pressure of 1 bar, preferably at least 2 bar and particularly preferentially at least 3 bar ( FIG. 4 ).
  • the mouth protection device 12 a further comprises a sealing element 90 a .
  • the sealing element 90 a is fixedly connected to the mask base body 16 a .
  • the sealing element 90 a is arranged at an upper edge of the mask base body 16 a .
  • the sealing element 90 a is configured to seal the mask base body 16 a against the face of the user 18 a at least at an upper edge of the mask base body 16 a .
  • the sealing element 90 a is configured to seal a breathing zone 20 a and an outlet region 40 a toward the eyes of the user 18 a in order to avoid an airflow into the eyes of the user 18 a .
  • the sealing element 90 a is made of a foam material.
  • the sealing element 90 a is realized by a foam material strip. By way of example, the sealing element 90 a is glued with the mask base body 16 a ( FIG. 6 ).
  • the mouth protection device 12 a further comprises a breathing air supply line 22 a which is connected with the mask base body 16 a .
  • the breathing air supply line 22 a delimits a breathing air channel 24 a , which ends in the breathing zone 20 a and is configured to guide the active breathing air flow 26 a .
  • the breathing air supply line 22 a is implemented by an elastic tube.
  • the breathing air supply line 22 a has an oval cross section.
  • a different cross section of the breathing air supply line 22 a deemed expedient by someone skilled in the art, would also be conceivable, like for example a circular cross section.
  • the breathing air supply line 22 a extends from the breathing air line 46 a to the breathing air zone 20 a.
  • the mouth protection device 12 a comprises a further breathing air supply line 22 ′ a , which is redundant to the breathing air supply line 22 a and is connected to the mask base body 16 a .
  • the further breathing air supply line 22 ′ a delimits a further breathing air channel, which ends in the breathing zone 20 a and is configured to guide the active breathing air flow 26 a .
  • the further breathing air supply line 22 ′ a is implemented by an elastic tube.
  • the further breathing air supply line 22 ′ a has an oval cross section.
  • the further breathing air supply line 22 ′ a extends from the breathing air line 46 a to the breathing zone 20 a .
  • the further breathing air supply line 22 ′ a is arranged on a side of the mask base body 16 a that faces away from the breathing air supply line 22 a .
  • the breathing air supply lines 22 a , 22 ′ a are configured to be guided past a head 30 a of the user 18 a on different sides of the head 30 a of the user 18 a .
  • the further breathing air supply line 22 ′ a has a function that is redundant to the breathing air supply line 22 a .
  • the further breathing air supply line 22 ′ a serves for increasing safety of a supply with the breathing air flow 26 a .
  • the breathing air supply line 22 a and the further breathing air supply line 22 ′ a are respectively functional independently from each other.
  • the breathing air line 46 a that is connected with the blower device 14 a is configured to guide the breathing air flow 26 a to the breathing air supply lines 22 a , 22 ′ a .
  • the breathing air line 46 a is furthermore configured to divide the breathing air flow 26 a for the breathing air supply line 22 a and the further breathing air supply line 22 ′ a .
  • the breathing air line 46 a is coupled with the breathing air supply line 22 a and the further breathing air supply line 22 ′ a via a T-connection piece 108 a .
  • the T-connection piece 108 a is configured to be arranged in a nape region of the user 18 a.
  • the mouth protection device 12 a further comprises a fastening strap 28 a for fixing the mask base body 16 a to the head 30 a of the user 18 a .
  • the fastening strap 28 a is embodied by an elastic strap, like in particular a rubber strap.
  • the fastening strap 28 a has a width corresponding at least approximately to a width of the breathing air supply line 22 a .
  • an effective length of the fastening strap 28 a is realized so as to be adjustable.
  • the fastening strap 28 a extends from a first end of the mask base body 16 a to an opposite-situated second end of the mask base body 16 a .
  • the fastening strap 28 a extends from a first end of the mask base body 16 a , in which the breathing air supply line 22 a is connected with the mask base body 16 a , to an opposite-situated second end of the mask base body 16 a , in which the further breathing air supply line 22 ′ a is connected with the mask base body 16 a .
  • the fastening strap 28 a is configured to be guided around an occiput, in particular in a nape region.
  • the mouth protection device 12 a comprises at least one connection unit 32 a for a simultaneous plug-in connection of the fastening strap 28 a and the at least one breathing air supply line 22 a , 22 ′ a with the mask base body 16 a .
  • the mouth protection device 12 a comprises the connection unit 32 a and a further connection unit, which is not shown in detail, for a simultaneous plug-in connection of the fastening strap 28 a with the breathing air supply line 22 a and the further breathing air supply line 22 ′ a , respectively, and with the mask base body 16 a .
  • the connection units 32 a serve for pulling off or putting off the mouth protection device 12 a . With the connection units 32 a , a coupling is brought about for example via a plug-in movement.
  • connection units 32 a in each case comprise a first coupling element 92 a and a second coupling element 94 a corresponding to the first coupling element 92 a .
  • the first coupling elements 92 a of the connection units 32 a exemplarily form in each case an interface receptacle, while the second coupling elements 94 a of the connection units 32 a in each case form an interface projection.
  • the first coupling elements 92 a of the connection units 32 a are fixedly connected with the mask base body 16 a respectively at opposite ends.
  • the second coupling element 94 a of the connection unit 32 a is implemented fixedly with a first end of the fastening strap 28 a and with the breathing air supply line 22 a .
  • the further second coupling element 94 a of the further connection unit 32 a is implemented fixedly with a second end of the fastening strap 28 a and with the further breathing air supply line 22 ′ a .
  • the first coupling elements 92 a of the connection units 32 a are respectively implemented by a tube connection.
  • the first coupling elements 92 a of the connection units 32 a are respectively configured to latch with the second coupling elements 94 a of the connection units 32 a .
  • the second coupling elements 94 a of the connection units 32 a in each case comprise actuation elements 96 a for releasing the latch connection ( FIGS. 1 , 5 ).
  • the mouth protection device 12 a comprises a head-fastening strap 98 a for an additional fixing of the mask base body 16 a to the head 30 a of the user 18 a . Furthermore, an effective length of the head-fastening strap 98 a is implemented so as to be adjustable. The head-fastening strap 98 a extends from a first end of the mask base body 16 a to an opposite-situated second end of the mask base body 16 a .
  • the head-fastening strap 98 a extends from a first end of the mask base body 16 a , in which the breathing air supply line 22 a is connected with the mask base body 16 a , to an opposite-situated second end of the mask base body 16 a , in which the further breathing air supply line 22 ′ a is connected with the mask base body 16 a .
  • the head-fastening strap 98 a is configured to be guided around an occiput, particular an upper head.
  • the mouth protection device 12 a comprises a fastening unit 100 a and a further fastening unit 100 ′ a for an adjustable fastening of the head-fastening strap 98 a with the mask base body 16 a on said ends.
  • the head-fastening strap 98 a is guided adjustably through recesses at the fastening units 100 a , 100 ′ a.
  • the mouth protection device 12 a further comprises an adjusting unit 34 a , by means of which at least an effective length of a side edge 36 a of the mask base body 16 a is implemented so as to be adjustable.
  • an effective length of the side edge 36 a is implemented so as to be adjustable from the first end of the mask base body 16 a , in which the first coupling element 92 a is arranged, to the second end of the mask base body 16 a , in which the further first coupling element is arranged.
  • the side edge 36 a extends substantially parallel to a main extent direction of the mask base body 16 a .
  • the adjusting unit 34 a comprises a cord 102 a , in particular an elastic cord, and a cord clamp 104 a .
  • the cord 102 a of the adjusting unit 34 a extends in a channel of the mask base body 16 a from the first end of the mask base body 16 a to the second end of the mask base body 16 a , which is situated opposite the first end.
  • the cord 102 a is fastened on the first end and on the second end.
  • An effective length of the cord 102 a and thus also of the side edge 36 a of the mask base body 16 a , is implemented so as to be manually adjustable via the cord clamp 104 a .
  • an effective length of the cord 102 a is implemented so as to be manually adjustable via the cord clamp 104 a by the formation of different-sized loops of the cord 102 a.
  • the mouth protection device 12 a further comprises the separating layer 38 a , which is connected with the mask base body 16 a and is configured for an at least partial separation of the breathing zone 20 a from the outlet region 40 a .
  • the outlet region 40 a is at least partly delimited by the mask base body 16 a .
  • the outlet region 40 a is arranged below the breathing zone 20 a .
  • the mask base body 16 a delimits, together with the face of the user 18 a , a spatial region that is divided into a breathing zone 20 a and an outlet region 40 a by means of the separating layer 38 a .
  • the separating layer 38 a forms, together with the mask base body 16 a , a channel that at least partly forms the breathing zone 20 a and extends as far as a middle region of the mouth protection device 12 a .
  • the channel formed by the separating layer 38 a extends from the breathing air channel 24 a and the further breathing air channel as far as a mouth and/or nose region of the user 18 a .
  • the breathing zone 20 a merges into the outlet region 40 a .
  • the separating layer 38 a is implemented integrally with the mask base body 16 a .
  • the separating layer 38 a protrudes perpendicularly to the mask base body 16 a between the breathing zone 20 a and the outlet region 40 a .
  • the separating layer 38 a has in a middle region a recess 106 a connecting the breathing zone 20 a to the outlet region 40 a.
  • the separating layer 38 a is implemented at least substantially of a textile material.
  • the separating layer 38 a is completely made of a textile.
  • the separating layer 38 a is configured for a defined air guidance.
  • the separating layer 38 a is configured to guide the breathing air flow 26 a past the mouth and/or nose region of the user 18 a before the breathing air flow 26 a reaches the outlet region 40 a .
  • the separating layer 38 a has in its middle region the recess 106 a , which connects the breathing zone 20 a to the outlet region 40 a .
  • the breathing air flow 26 a flows from the breathing air channel 24 a and the further breathing air channel into the breathing zone 20 a and from the breathing air zone 20 a through the recess 106 a into the outlet region 40 a .
  • the recess 106 a is arranged in a proximity of the mouth and/or nose region of the user 18 a ( FIG. 6 ).
  • the mouth protection device 12 a comprises a discharge valve 42 a , which is configured to regulate a pressure in the breathing zone 20 a to an at least approximately constant value.
  • the discharge valve 42 a is implemented by an overpressure valve, in particular a one-way overpressure valve, which is configured to open if a defined overpressure is exceeded in the breathing zone 20 a , respectively the outlet region 40 a , relative to an environment.
  • the discharge valve 42 a is configured to permit, in particular maintain, a defined overpressure in the breathing zone 20 a .
  • the discharge valve 42 a is implemented by a mechanical valve.
  • the mask base body 16 a is not completely sealed with respect to the face of the user 18 a , such that air may also leave at a transition from the mask base body 16 a to the face, besides the discharge valve 42 a . If at the transition from the mask base body 16 a to the face there is too much leakage or if the mouth protection device 12 a is taken off, it is no longer possible for the pressure in the breathing zone 20 a to be maintained and the pressure drops below the limit value of the discharge valve 42 a . This may be detected by the blower device 14 a , in particular by a load of the fan 48 a , and if applicable a warning signal may be given to the user 18 a .
  • the fan 48 a may thus stop automatically when the mouth protection device 12 a is put on.
  • the pressure in the breathing zone 20 a is regulated to an approximately constant value by means of the discharge valve 42 a ( FIG. 4 ).
  • the mask base body 16 a comprises a subregion 44 a which is implemented in an air-permeable fashion.
  • the subregion 44 a is in particular made of an air-permeable textile.
  • the subregion 44 a directly adjoins the outlet region 40 a .
  • the subregion 44 a serves for a defined discharge of air in the outlet region 40 a .
  • the subregion 44 a is provided in addition to the discharge valve 42 a ; it would however also be conceivable that only the subregion 44 a is provided, the subregion 44 a taking on the function of the discharge valve 42 a.
  • FIG. 7 a further exemplary embodiment of the invention is shown.
  • the following description is substantially limited to the differences between the exemplary embodiments, wherein regarding components, features and functions that remain the same, the description of the exemplary embodiment of FIGS. 1 to 6 may be referred to.
  • the letter a that was added to the reference numerals of the exemplary embodiment of FIGS. 1 to 6 has been replaced by the letter b in the reference numerals of the exemplary embodiment of FIG. 7 .
  • the drawings and/or the description of the exemplary embodiment of FIGS. 1 to 6 may principally be referred to.
  • FIG. 7 shows a blower device 14 b of a respiratory protection system.
  • the blower device 14 b is configured for a generation of a breathing air flow 26 b .
  • the blower device 14 b is configured for a generation of a breathing air flow 26 b for a mouth protection device.
  • the blower device 14 b comprises a housing unit 58 b .
  • the housing unit 58 b is implemented by a plastic housing.
  • the housing unit 58 b comprises two interconnected housing shells 70 b , 72 b , namely a first housing shell 70 b and a second housing shell 72 b .
  • the housing unit 58 b has a thickness of less than 70 mm.
  • the blower device 14 b further comprises a fan 48 b for generating an airflow 50 b .
  • the blower device 14 b is configured to create an overpressure in the mouth protection device 12 b .
  • the fan 48 b is configured to create an overpressure in the mouth protection device 12 b .
  • the fan 48 b is implemented by an electrical radial fan.
  • the blower device 14 b further comprises a filter element 52 b .
  • the filter element 52 b is configured to be flown through by the airflow 50 b .
  • the filter element 52 b is implemented by a rectangular-cuboid-shaped filter module.
  • the filter element 52 b is implemented by an aerosol filter.
  • the filter element 52 b is embodied as a depth filter, in particular as a lamellate filter.
  • a main extent plane 54 b of the filter element 52 b extends at least substantially parallel to a main extent plane of the housing unit 58 b .
  • the filter element 52 b is arranged in a lower region of the blower device 14 b .
  • the housing unit 58 b accommodates the fan 48 b and the filter element 52 b.
  • the blower device 14 b comprises a further filter element 52 ′ b .
  • the further filter element 52 ′ b is configured to be flown through by the airflow 50 b .
  • the further filter element 52 ′ b is configured to be flown through by the airflow 50 b before the filter element 52 b .
  • the further filter element 52 ′ b is implemented by a rectangular-cuboid-shaped filter module.
  • the further filter element 52 ′ b is implemented by an activated-carbon odor filter.
  • a main extent plane 54 ′ b of the further filter element 52 ′ b extends at least substantially parallel to a main extent plane of the housing unit 58 b .
  • the further filter element 52 ′ b is arranged in a lower region of the blower device 14 b .
  • the housing unit 58 b accommodates the fan 48 b , the filter element 52 b and the further filter element 52 ′ b .
  • Air inlet openings 78 b are arranged on an entry side of the further filter element 52 ′ b .
  • the further filter element 52 ′ b is arranged on an entry side of the filter element 52 b.
  • the fan 48 b is arranged next to the filter element 52 b , the airflow 50 b being deflected between the fan 48 b and the filter element 52 b .
  • the further filter element 52 ′ b is also arranged next to the fan 48 b .
  • the filter element 52 b , the further filter element 52 ′ b and the fan 48 b are together arranged in the housing unit 58 b.
  • the blower device 14 b further comprises an air conveying channel 82 b , which accommodates the filter element 52 b and is configured for guiding the airflow 50 b between the filter element 52 b and the fan 48 b .
  • the air conveying channel 82 b is implemented separately from the housing unit 58 b .
  • the housing unit 58 b comprises a receptacle for a defined accommodation of the air conveying channel 82 b .
  • the air conveying channel 82 b is implemented so as to be removable from the housing unit 58 b .
  • the air conveying channel 82 b can be inserted in the housing unit 58 b in a defined position.
  • the air conveying channel 82 b In a state when the air conveying channel 82 b is inserted in the housing unit 58 b , the air conveying channel 82 b is directly coupled with an entry channel of the fan 48 b .
  • An outlet opening 114 b of the air conveying channel 82 b is coupled with the entry channel of the fan 48 b in a sealing manner.
  • the filter element 52 b is fixedly integrated in the air conveying channel 82 b .
  • the further filter element 52 ′ b is fixedly integrated in the air conveying channel 82 b .
  • the air conveying channel 82 b , the filter element 52 b and the further filter element 52 ′ b form a filter exchange module 110 b .
  • the filter exchange module 110 b is implemented so as to be exchangeable as a whole via the cover 74 b .
  • the filter element 52 b and the further filter element 52 ′ b are at least partially connected to the air conveying channel 82 b by substance-to-substance bond.
  • the filter element 52 b and the further filter element 52 ′ b are glued in the air conveying channel 82 b .
  • the filter element 52 b and the further filter element 52 ′ b are glued in the air conveying channel 82 b in a region of an inlet opening 112 b .
  • the air conveying channel 82 b forms a filter frame of the filter element 52 b and of the further filter element 52 ′ b .
  • the filter element 52 b and the further filter element 52 ′ b are arranged in a stacked fashion.
  • the filter element 52 b is arranged along the airflow 50 b fluidically upstream of the fan 48 b .
  • the further filter element 52 ′ b is arranged along the airflow 50 b fluidically upstream of the filter element 52 b .
  • the airflow 50 b between the fan 48 b and the filter element 52 b is deflected by at least approximately 90°. A deflection of the airflow 50 b is brought about in the air conveying channel 82 b .
  • a flow-through direction r 1 of the airflow 50 b through the filter element 52 b is substantially different from a flow-through direction r 2 of the airflow 50 b through the fan 48 b .
  • a flow-through direction r 3 of the airflow 50 b through the further filter element 52 ′ b is substantially different from the flow-through direction r 2 of the airflow 50 b through the fan 48 b .
  • the flow-through direction r 3 of the airflow 50 b through the further filter element 52 ′ b corresponds essentially to the flow-through direction r 1 of the airflow 50 b through the filter element 52 b .
  • the flow-through direction r 2 of the airflow 50 b through the fan 48 b runs parallel to a main extent plane 56 b of the fan 48 b .
  • the flow-through direction r 1 of the airflow 50 b through the filter element 52 b runs perpendicularly to the main extent plane 54 b of the filter element 52 b .
  • the flow-through direction r 3 of the airflow 50 b through the further filter element 52 ′ b runs perpendicularly to the main extent plane 54 ′ b of the further filter element 52 ′ b .
  • the flow-through direction r 1 of the filter element 52 b and the flow-through direction r 3 of the further filter element 52 ′ b are angled by at least approximately 90° relative to the flow-through direction r 2 of the fan 48 b .
  • the air conveying channel 82 b is configured for deflecting the airflow 50 b between the fan 48 b and the filter element 52 b .
  • the air conveying channel 82 b has a bent air guidance.
  • a flow-in direction r L1 of the airflow 50 b into the air conveying channel 82 b is substantially different from a flow-out direction r L2 of the airflow 50 b out of the air conveying channel 82 b .
  • An angle included by the flow-in direction r L2 of the airflow 50 b into the air conveying channel 82 b and the flow-out direction r L2 of the airflow 50 b out of the air conveying channel 82 b amounts to at least approximately 90°.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US17/787,421 2019-12-20 2020-12-17 Blower device for a respirator Pending US20230044656A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP19218887.8A EP3838349A1 (de) 2019-12-20 2019-12-20 Gebläsevorrichtung für ein atemschutzsystem
EP19218887.8 2019-12-20
EP20171326.0A EP3838350A1 (de) 2019-12-20 2020-04-24 Gebläsevorrichtung für ein atemschutzsystem
EP20171326.0 2020-04-24
PCT/EP2020/086799 WO2021123007A1 (de) 2019-12-20 2020-12-17 Gebläsevorrichtung für ein atemschutzsystem

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US17/787,421 Pending US20230044656A1 (en) 2019-12-20 2020-12-17 Blower device for a respirator
US17/126,648 Pending US20210187333A1 (en) 2019-12-20 2020-12-18 Blower device for a respiratory protection system

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EP (2) EP3838349A1 (de)
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CA3238208A1 (en) * 2021-11-12 2023-05-19 Safeback As A survival device for feeding a steady supply of breathable air into an environment

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WO2021123007A1 (de) 2021-06-24
CN114845784A (zh) 2022-08-02

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