Blower device for a respirator

Abstract

A blower device for a respiratory protection system comprises a fan for generating an airflow, further comprises at least one filter element which is configured to be flown through by the airflow, comprises a housing unit accommodating the fan and the at least one filter element and comprises an air conveying channel, which accommodates the filter element and is configured for guiding an 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, wherein 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.

Description

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.

Advantages of the Invention

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.

It is proposed that 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. Preferably 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. Preferably 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. Preferentially 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.

Preferably 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. Preferably 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.

By 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. Preferably the blower device is connected to the mouth protection device of the respiratory protection system via at least one breathing air supply line. Preferably 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. Preferentially 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. In particular, 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. By 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. For this purpose the filter element preferably comprises a filter which is during operation flown through by the airflow. Preferably 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. In this context a variety of filters, deemed expedient by someone skilled in the art, are conceivable. Preferably the filter of the filter element is in particular implemented by an aerosol filter. Preferably the filter is embodied as a depth filter or cake filter, in particular as a lamellate filter.

By “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. Preferably 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. Preferably the fan and the filter element are arranged side by side in a main extent plane of the blower device. Preferentially, viewed perpendicularly to the 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. By 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.

An “air conveying channel” is in particular to mean, in this context, a component which forms a channel and is configured for guiding air. Preferably 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. Preferentially 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. Preferably 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. By 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. Preferably 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.

Preferably 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°. By the “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. Preferably 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. Preferentially 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. Preferably 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. This in particular allows providing an advantageously compact, in particular flat, blower device. It is in particular possible to dispense with a direct stacking of the fan and the filter unit. As a result, in particular an advantageously low construction height of the blower device is achievable.

The implementation according to the invention in particular allows providing an advantageously compact, in particular flat, blower device. In particular, a direct coupling of the air conveying channel and the filter element is obtainable. As a result, in particular 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. As a result, in particular an advantageously low construction height of the blower device is achievable. Furthermore, 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.

It is further proposed that the air conveying channel and the at least one filter element form a filter exchange module. Preferably 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.

Beyond this it is proposed that the at least one filter element is connected to the air conveying channel at least partly by substance-to-substance bond. Preferably 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. As a result, in particular 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. As a result, in particular an advantageously low construction height of the blower device is achievable. Furthermore, in particular 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.

It is also proposed that the air conveying channel forms a filter frame of the at least one filter element. Preferably the air conveying channel is configured for a positioning and/or a stabilization of the filter element. Preferentially the filter element is realized so as to be free of a frame of its own. Especially preferentially the filter of the filter element is introduced directly into the air conveying channel. In particular, 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.

Moreover, it is proposed that 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. Preferably the air conveying channel has an inlet opening, wherein the flow-in direction extends perpendicularly to a plane of the inlet opening. Preferentially a flow-in direction of the airflow into the air conveying channel extends perpendicularly to a main extent plane of the filter element. Preferably 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. Preferably 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°. In this way in particular an advantageously compact arrangement of the air conveying channel and of the filter element is achievable. It is thus in particular possible to provide an advantageously compact, in particular flat-built, blower device.

Furthermore, it is proposed that 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. Preferably 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. Preferentially 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. Preferably 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.

Beyond this it is proposed that the blower device comprises a further filter element, which is situated next to the fan and is fixedly integrated in the air conveying channel. Preferably 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. Preferably the further filter element is arranged next to the fan. Furthermore, the flow-through direction of the airflow through the further filter element differs from a flow-through direction through the fan. This in particular enables an advantageously compact arrangement of the fan, the filter element and the further filter element. It is thus in particular possible to provide an advantageously compact, in particular flat-built, blower device.

It is further proposed that the air conveying channel, the filter element and the further filter element form a filter exchange module, in particular an alternative filter exchange module. Preferably 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. It is in particular conceivable that different filter exchange modules can be inserted, depending on an application. In particular, 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.

It is moreover proposed that the housing unit has a thickness of less than 70 mm. Preferably 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. Preferably 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.

Beyond this it is proposed that the fan is configured to create a volume flow of the airflow of at least 50 l/min and maximally 250 l/min. Preferably 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. It is proposed that the at least one blower device is configured to create an overpressure in the mouth protection device. Preferably 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. Preferably 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. Preferably the blower device is connected to the mouth protection device of the respiratory protection system via at least one breathing air supply line. Preferably 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. By 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. Preferably 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. Preferentially 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. Preferentially the mouth protection device is free of a cover of a user's eyes, in particular a user's eye region. Preferably 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.

The blower device according to the invention and/or the respiratory protection system shall not be limited to the application and implementation described above. In particular, in order to fulfill a functionality that is described here, 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. Moreover, in regard to the value ranges given in the present disclosure, values situated within the limits mentioned shall also be considered as disclosed and as applicable according to requirements.

DRAWINGS

Further advantages will become apparent from the following description of the drawings. In the drawings two exemplary embodiments of the invention are shown. The drawings, the description and the claims contain a plurality of features in combination. Someone skilled in the art will purposefully also consider the features individually and will find further expedient combinations.

It is shown in:

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, and

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.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

FIG. 1 shows a respiratory protection system 10a. The respiratory protection system 10a is realized by a blower respiratory protection system. The respiratory protection system 10a is in particular realized by a blower respiratory protection system of safety class TH3. The respiratory protection system 10a is configured for a protection of a user 18a from particles like smoke, aerosols and/or dust. Furthermore, the respiratory protection system 10a is in addition capable of protecting from unpleasant smells and noxious ozone. It is in particular conceivable that in environments with insalubrious or even toxic gases, the respiratory protection system 10a protects the user 18a from organic, inorganic and/or acidic gases. The respiratory protection system 10a comprises a blower device 14a and a mouth protection device 12a. The blower device 14a is configured to generate a breathing air flow 26a. The blower device 14a is configured to generate a breathing air flow 26a for the mouth protection device 12a.

The blower device 14a comprises a housing unit 58a. The housing unit 58a is realized by a plastic housing. The housing unit 58a comprises two housing shells 70a, 72a, namely a first housing shell 70a and a second housing shell 72a, which are connected to each other. The first housing shell 70a comprises two openable covers 74a, 76a, via which an inner space of the housing unit 58a can be made accessible. The second housing shell 72a forms a rear side of the housing unit 58a, which faces toward the user 18a in a worn state. The second housing shell 72a is concavely curved on an outer side. The curvature of the second housing shell 72a is adapted to a back curvature of a human. The housing unit 58a further comprises several air inlet openings 78a. The air inlet openings 78a are implemented by slits in the first housing shell 70a. In operation, the air inlet openings 78a serve for suctioning an ambient air via an airflow 50a. Furthermore, the housing unit 58a comprises an air outlet opening 80a. The air outlet opening 80a is realized by a tube connection piece at the first housing shell 70a. In operation, the air outlet opening 80a serves for an output of the purified airflow 50a, in particular a breathing air flow 26a. In operation, the breathing air flow 26a is forwarded from the air outlet opening 80a to the mouth protection device 12a (FIGS. 1, 2).

The housing unit 58a has a thickness d of less than 70 mm. The housing unit 58a has a thickness d of less than 50 mm.

The blower device 14a further comprises a fan 48a for a generation of an airflow 50a. The blower device 14a is configured for creating an overpressure in the mouth protection device 12a. The fan 48a is configured to create an overpressure in the mouth protection device 12a. The fan 48a is configured to create a volume flow of the airflow 50a of at least 50 l/min and maximally 250 l/min. The fan 48a is configured to create a volume flow of the airflow 50a of at least 80 l/min and maximally 120 l/min. During operation, the blower device 14a is configured to create in the mouth protection device 12a, by means of the fan 48a, a relative overpressure with respect to an environment. The fan 48a 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 48a is arranged in the housing unit 58a. A main extent plane 56a of the fan 48a extends at least substantially parallel to a main extent plane of the housing unit 58a. The fan 48a is arranged in an upper region of the blower device 14a. The air outlet opening 80a is arranged on an exit side of the fan 48a. The blower device 14a further comprises a control and/or regulation unit 86a for a control and/or regulation of the fan 48a during operation. The control and/or regulation unit 86a is in particular configured for an automatic adaption of a performance grade of the fan 48a. The control and/or regulation unit 86a is configured to adjust an air flow level of the fan 48a depending on a saturation of a filter element 52a. The control and/or regulation unit 86a is furthermore configured for an automatic airflow control and airflow adaption (FIG. 3).

The blower device 14a also comprises a filter element 52a. The filter element 52a is configured to be flown through by the airflow 50a. The filter element 52a is implemented by a rectangular-cuboid-shaped filter module. The filter element 52a is implemented by an aerosol filter. The filter element 52a is embodied as a depth filter, in particular as a lamellate filter. It would however also be conceivable that the filter element 52a is implemented as a gas filter, in particular as an A1B1E1 gas filter. The filter element 52a is arranged in the housing unit 58a. A main extent plane 54a of the filter element 52a extends at least substantially parallel to a main extent plane of the housing unit 58a. The filter element 52a is arranged in a lower region of the blower device 14a. The housing unit 58a accommodates the fan 48a and the filter element 52a. On an entry side of the filter element 52a, the air inlet opening 78a is arranged. Furthermore, the filter element 52a is implemented so as to be exchangeable via the cover 74a. A filter exchange module 110a with the filter element 52a is implemented so as to be exchangeable via the cover 74a (FIG. 3).

The fan 48a is arranged next to the filter element 52a, the airflow 50a being deflected between the fan 48a and the filter element 52a. The filter element 52a and the fan 48a are together arranged in the housing unit 58a. The blower device 14a further comprises an air conveying channel 82a, which accommodates the filter element 52a and which is configured to guide the airflow 50a between the filter element 52a and the fan 48a. The air conveying channel 82a is embodied separately from the housing unit 58a. The housing unit 58a comprises a receptacle for a defined accommodation of the air conveying channel 82a. The air conveying channel 82a is realized so as to be removable from the housing unit 58a. The air conveying channel 82a can be inserted in the housing unit 58a in a defined position. Ina state of the air conveying channel 82a when inserted in the housing unit 58a, the air conveying channel 82a is directly coupled with an entry channel of the fan 48a. An outlet opening 114a of the air conveying channel 82a is coupled with the entry channel of the fan 48a in a sealing fashion. The air conveying channel 82a further comprises an inlet opening 112a and the outlet opening 114a, an opening cross section of the inlet opening 112a being essentially larger than an opening cross section of the outlet opening 114a. A surface area of the opening cross section of the inlet opening 112a is at least twice as large as a surface area of the opening cross section of the outlet opening 114a. Preferentially a surface area of the opening cross section of the inlet opening 112a 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 114a. The surface area of the opening cross section of the inlet opening 112a is in particular at least approximately equivalent to a surface area of the filter element 52a in the main extent plane 54a of the filter element 52a.

The filter element 52a is fixedly integrated in the air conveying channel 82a. The air conveying channel 82a and the filter element 52a form the filter exchange module 110a. The filter exchange module 110a is implemented so as to be exchangeable as a whole via the cover 74a. The filter element 52a is at least partly connected to the air conveying channel 82a by substance-to-substance bond. The filter element 52a is glued into the air conveying channel 82a. The filter element 52a is glued into the air conveying channel 82a in a region of the inlet opening 112a. The air conveying channel 82a forms a filter frame of the filter element 52a. The air conveying channel 82a is configured for a positioning and a stabilization of the filter element 52a. The filter of the filter element 52a is directly introduced in the air conveying channel 82a.

The filter element 52a is arranged along the airflow 50a fluidically upstream of the fan 48a. The airflow 50a between the fan 48a and the filter element 52a is deflected by at least approximately 90°. A deflection of the airflow 50a is brought about in the air conveying channel 82a. A flow-through direction r₁ of the airflow 50a through the filter element 52a is substantially different from a flow-through direction r₂ of the airflow 50a through the fan 48a. The flow-through direction r₂ of the airflow 50a through the fan 48a runs parallel to the main extent plane 56a of the fan 48a. In an implementation of the fan 48a as an axial fan it would, however, also be conceivable that the flow-through direction r₂ of the airflow 50a runs through the fan 48a perpendicularly to the main extent plane 56a of the fan 48a. The flow-through direction r₁ of the airflow 50a through the filter element 52a runs perpendicularly to the main extent plane 54a of the filter element 52a. The flow-through direction r₁ of the filter element 52a is angled by at least approximately 90° with respect to the flow-through direction r₂ of the fan 48a. The air conveying channel 82a is configured for a deflection of an airflow 50a between the fan 48a and the filter element 52a. The air conveying channel 82a has a bent air guidance. A flow-in direction r_L1 of the airflow 50a into the air conveying channel 82a is substantially different from a flow-out direction r_L2 of the airflow 50a out of the air conveying channel 82a. An angle included by the flow-in direction r_L1 of the airflow 50a into the air conveying channel 82a and the flow-out direction r_L2 of the airflow 50a out of the air conveying channel 82a amounts to at least approximately 90° (FIG. 3).

The filter element 52a has the main extent plane 54a. The fan 48a has the main extent plane 56a. It would be conceivable that the main extent plane 54a extends parallel to the main extent plane 56a, wherein a distance between the main extent plane 54a of the filter element 52a and the main extent plane 56a of the fan 48a is smaller than a maximum thickness of the filter element 52a. Preferentially, in the case of a parallel implementation, a distance between the main extent plane 54a of the filter element 52a and the main extent plane 56a of the fan 48a would be smaller than 50 mm, preferably smaller than 30 mm and particularly preferentially smaller than 10 mm. In the implementation shown the main extent plane 54a of the filter element 52a is angled with respect to the main extent plane 56a of the fan 48a. An angle included by the main extent plane 54a of the filter element 52a and the main extent plane 56a of the fan 48a amounts to more than 80°, preferably more than 120° and particularly preferentially more than 160°. The angle included by the main extent plane 54a of the filter element 52a and the main extent plane 56a of the fan 48a amounts to at least approximately 165°. A normal vector of the main extent plane 54a of the filter element 52a that intersects with the filter element 52a and a normal vector of the main extent plane 56a of the fan 48a that intersects with the fan 48a include a smallest angle of at least approximately 15°. Preferably the main extent plane 56a of the fan 48a and the main extent plane 54a of the filter element 52a 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 56a of the fan 48a and the main extent plane 54a of the filter element 52a runs and which is situated symmetrically between the filter element 52a and the fan 48a. Preferentially a section line of the main extent plane 54a of the filter element 52a and the main extent plane 56a of the fan 48a runs in a proximity of the filter element 52a and of the fan 48a. A smallest distance between the section line and the filter element 52a 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 52a is smaller than a smallest distance between the fan 48a and the filter element 52a. At least a large portion of normal vectors of the main extent plane 54a of the filter element 52a that intersect with the filter element 52a are free of an intersection point with the fan 48a. All normal vectors of the main extent plane 54a of the filter element 52a that intersect with the filter element 52a are free of an intersection point with the fan 48a. The filter element 52a and the fan 48a are partially arranged at an angle next to each other (FIG. 3).

The blower device 14a further comprises an energy storage 84a. The energy storage 84a is embodied by an accumulator. The energy storage 84a serves for an energy supply of the fan 48a. A main extent plane of the energy storage 84a extends at least substantially parallel to a main extent plane of the housing unit 58a. The energy storage 84a is arranged in a lower region of the blower device 14a. The housing unit 58a accommodates the fan 48a, the filter element 52a and the energy storage 84a. The housing unit 58a serves for a protection and an orientation of the fan 48a, the filter element 52a and the energy storage 84a. Furthermore, the energy storage 84a is implemented such that it is exchangeable via the cover 76a (FIG. 3).

The respiratory protection system 10a further comprises an external operating unit 62a. The external operating unit 62a is embodied by a remote control. The operating unit 62a comprises operating elements 64a and a control and/or regulation unit 66a that is configured for a control and/or regulation of the blower device 14a. By way of example, the external operating unit 62a is connected to the blower device 14a via a cable 88a. The control and/or regulation unit 66a of the external operating unit 62a is in particular configured to actuate the control and/or regulation unit 86a of the blower device 14a depending on an input at the operating elements 64a. For example, a performance grade of the fan 48a can be adjusted via the operating elements 64a. Furthermore, the fan 48a can be activated or deactivated via the operating elements 64a. The external operating unit 62a further comprises a sensor unit 68a for capturing environmental parameters. The control and/or regulation unit 66a is configured, in at least one operation state, to control and/or regulate the blower device 14a on the basis of the environmental parameters. The control and/or regulation unit 66a is configured, in operation, to actuate the control and/or regulation unit 86a of the blower device 14a, a performance grade of the fan 48a being adapted via the control and/or regulation unit 86a of the blower device 14a on the basis of the environmental parameters. The sensor unit 68a is configured to capture an air quality, an ambient pressure and/or an oxygen concentration.

The respiratory protection system 10a further comprises a vest 60a that is to be worn by the user 18a. The vest 60a is embodied as a textile vest. On a rear side of the vest 60a the blower device 14a is arranged. The blower device 14a is releasably connected to the vest 60a. During operation, the blower device 14a is worn by the user 18a on his back via the vest 60a. The external operating unit 62a is moreover configured to be worn by a user on his chest. The external operating unit 62a is arranged on a front side of the vest 60a.

Therefore, environmental parameters can be captured by means of the sensor unit 68a in particular in a head region of the user 18a.

The respiratory protection system 10a further comprises a breathing air line 46a, which is connected to the blower device 14a and is configured for guiding the breathing air flow 26a. The breathing air line 46a connects the blower device 14a to the mouth protection device 12a. The breathing air line 46a is connected to the blower device 14a via the air outlet opening 80a of the blower device 14a. The breathing air line 46a is embodied by a tube. In operation, the breathing air line 46a is configured for guiding the breathing air flow 26a.

The mouth protection device 12a comprises a mask base body 16a. The mask base body 16a is configured to cover a mouth and nose region of the user 18a. Beyond this the mask base body 16a is configured to at least partially delimit a breathing zone 20a. In operation, the mask base body 16a delimits the breathing zone 20a, together with the face of the user 18a and a separating layer 38a. The mask base body 16a is made at least largely of a flexurally soft material. The mask base body 16a is made completely of a flexurally soft material. The mask base body 16a is made completely of a dimensionally instable material.

The mask base body 16a is made at least largely of a textile material. The mask base body 16a is completely made of a textile. The mask base body 16a is made of a textile. The mask base body 16a is implemented so as to be at least substantially airtight. It would in particular be conceivable that a textile which the mask base body 16a is made of has a coating which at least reduces air permeability. The mask base body 16a 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 12a further comprises a sealing element 90a. The sealing element 90a is fixedly connected to the mask base body 16a. The sealing element 90a is arranged at an upper edge of the mask base body 16a. The sealing element 90a is configured to seal the mask base body 16a against the face of the user 18a at least at an upper edge of the mask base body 16a. The sealing element 90a is configured to seal a breathing zone 20a and an outlet region 40a toward the eyes of the user 18a in order to avoid an airflow into the eyes of the user 18a. The sealing element 90a is made of a foam material. The sealing element 90a is realized by a foam material strip. By way of example, the sealing element 90a is glued with the mask base body 16a (FIG. 6).

The mouth protection device 12a further comprises a breathing air supply line 22a which is connected with the mask base body 16a. The breathing air supply line 22a delimits a breathing air channel 24a, which ends in the breathing zone 20a and is configured to guide the active breathing air flow 26a. The breathing air supply line 22a is implemented by an elastic tube. By way of example, the breathing air supply line 22a has an oval cross section. However, a different cross section of the breathing air supply line 22a, deemed expedient by someone skilled in the art, would also be conceivable, like for example a circular cross section. The breathing air supply line 22a extends from the breathing air line 46a to the breathing air zone 20a.

Furthermore, the mouth protection device 12a comprises a further breathing air supply line 22′a, which is redundant to the breathing air supply line 22a and is connected to the mask base body 16a. The further breathing air supply line 22′a delimits a further breathing air channel, which ends in the breathing zone 20a and is configured to guide the active breathing air flow 26a. The further breathing air supply line 22′a is implemented by an elastic tube. By way of example, 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 46a to the breathing zone 20a. The further breathing air supply line 22′a is arranged on a side of the mask base body 16a that faces away from the breathing air supply line 22a. The breathing air supply lines 22a, 22′a are configured to be guided past a head 30a of the user 18a on different sides of the head 30a of the user 18a. The further breathing air supply line 22′a has a function that is redundant to the breathing air supply line 22a. The further breathing air supply line 22′a serves for increasing safety of a supply with the breathing air flow 26a. The breathing air supply line 22a and the further breathing air supply line 22′a are respectively functional independently from each other.

The breathing air line 46a that is connected with the blower device 14a is configured to guide the breathing air flow 26a to the breathing air supply lines 22a, 22′a. The breathing air line 46a is furthermore configured to divide the breathing air flow 26a for the breathing air supply line 22a and the further breathing air supply line 22′a. The breathing air line 46a is coupled with the breathing air supply line 22a and the further breathing air supply line 22′a via a T-connection piece 108a. The T-connection piece 108a is configured to be arranged in a nape region of the user 18a.

Beyond this the mouth protection device 12a further comprises a fastening strap 28a for fixing the mask base body 16a to the head 30a of the user 18a. The fastening strap 28a is embodied by an elastic strap, like in particular a rubber strap. The fastening strap 28a has a width corresponding at least approximately to a width of the breathing air supply line 22a. Furthermore, an effective length of the fastening strap 28a is realized so as to be adjustable. The fastening strap 28a extends from a first end of the mask base body 16a to an opposite-situated second end of the mask base body 16a. The fastening strap 28a extends from a first end of the mask base body 16a, in which the breathing air supply line 22a is connected with the mask base body 16a, to an opposite-situated second end of the mask base body 16a, in which the further breathing air supply line 22′a is connected with the mask base body 16a. In a state when the mouth protection device 12a is worn, the fastening strap 28a is configured to be guided around an occiput, in particular in a nape region. The mouth protection device 12a comprises at least one connection unit 32a for a simultaneous plug-in connection of the fastening strap 28a and the at least one breathing air supply line 22a, 22′a with the mask base body 16a. The mouth protection device 12a comprises the connection unit 32a and a further connection unit, which is not shown in detail, for a simultaneous plug-in connection of the fastening strap 28a with the breathing air supply line 22a and the further breathing air supply line 22′a, respectively, and with the mask base body 16a. The connection units 32a serve for pulling off or putting off the mouth protection device 12a. With the connection units 32a, a coupling is brought about for example via a plug-in movement. The connection units 32a in each case comprise a first coupling element 92a and a second coupling element 94a corresponding to the first coupling element 92a. The first coupling elements 92a of the connection units 32a exemplarily form in each case an interface receptacle, while the second coupling elements 94a of the connection units 32a in each case form an interface projection. The first coupling elements 92a of the connection units 32a are fixedly connected with the mask base body 16a respectively at opposite ends. The second coupling element 94a of the connection unit 32a is implemented fixedly with a first end of the fastening strap 28a and with the breathing air supply line 22a. The further second coupling element 94a of the further connection unit 32a is implemented fixedly with a second end of the fastening strap 28a and with the further breathing air supply line 22′a. The first coupling elements 92a of the connection units 32a are respectively implemented by a tube connection. The first coupling elements 92a of the connection units 32a are respectively configured to latch with the second coupling elements 94a of the connection units 32a. The second coupling elements 94a of the connection units 32a in each case comprise actuation elements 96a for releasing the latch connection (FIGS. 1, 5).

The mouth protection device 12a comprises a head-fastening strap 98a for an additional fixing of the mask base body 16a to the head 30a of the user 18a. Furthermore, an effective length of the head-fastening strap 98a is implemented so as to be adjustable. The head-fastening strap 98a extends from a first end of the mask base body 16a to an opposite-situated second end of the mask base body 16a. The head-fastening strap 98a extends from a first end of the mask base body 16a, in which the breathing air supply line 22a is connected with the mask base body 16a, to an opposite-situated second end of the mask base body 16a, in which the further breathing air supply line 22′a is connected with the mask base body 16a. In a state when the mouth protection device 12a is worn, the head-fastening strap 98a is configured to be guided around an occiput, particular an upper head.

The mouth protection device 12a comprises a fastening unit 100a and a further fastening unit 100′a for an adjustable fastening of the head-fastening strap 98a with the mask base body 16a on said ends. For fastening, the head-fastening strap 98a is guided adjustably through recesses at the fastening units 100a, 100′a.

The mouth protection device 12a further comprises an adjusting unit 34a, by means of which at least an effective length of a side edge 36a of the mask base body 16a is implemented so as to be adjustable. By means of the adjusting unit 34a, an effective length of the side edge 36a is implemented so as to be adjustable from the first end of the mask base body 16a, in which the first coupling element 92a is arranged, to the second end of the mask base body 16a, in which the further first coupling element is arranged. The side edge 36a extends substantially parallel to a main extent direction of the mask base body 16a. The adjusting unit 34a comprises a cord 102a, in particular an elastic cord, and a cord clamp 104a. The cord 102a of the adjusting unit 34a extends in a channel of the mask base body 16a from the first end of the mask base body 16a to the second end of the mask base body 16a, which is situated opposite the first end. The cord 102a is fastened on the first end and on the second end. An effective length of the cord 102a, and thus also of the side edge 36a of the mask base body 16a, is implemented so as to be manually adjustable via the cord clamp 104a. In particular, an effective length of the cord 102a is implemented so as to be manually adjustable via the cord clamp 104a by the formation of different-sized loops of the cord 102a.

The mouth protection device 12a further comprises the separating layer 38a, which is connected with the mask base body 16a and is configured for an at least partial separation of the breathing zone 20a from the outlet region 40a. The outlet region 40a is at least partly delimited by the mask base body 16a. The outlet region 40a is arranged below the breathing zone 20a. In an operation state, the mask base body 16a delimits, together with the face of the user 18a, a spatial region that is divided into a breathing zone 20a and an outlet region 40a by means of the separating layer 38a. The separating layer 38a forms, together with the mask base body 16a, a channel that at least partly forms the breathing zone 20a and extends as far as a middle region of the mouth protection device 12a. The channel formed by the separating layer 38a extends from the breathing air channel 24a and the further breathing air channel as far as a mouth and/or nose region of the user 18a. In the mouth and/or nose region of the user 18a, the breathing zone 20a merges into the outlet region 40a. The separating layer 38a is implemented integrally with the mask base body 16a. The separating layer 38a protrudes perpendicularly to the mask base body 16a between the breathing zone 20a and the outlet region 40a. The separating layer 38a has in a middle region a recess 106a connecting the breathing zone 20a to the outlet region 40a.

The separating layer 38a is implemented at least substantially of a textile material. The separating layer 38a is completely made of a textile. The separating layer 38a is configured for a defined air guidance. The separating layer 38a is configured to guide the breathing air flow 26a past the mouth and/or nose region of the user 18a before the breathing air flow 26a reaches the outlet region 40a. For this purpose, the separating layer 38a has in its middle region the recess 106a, which connects the breathing zone 20a to the outlet region 40a. During operation, the breathing air flow 26a flows from the breathing air channel 24a and the further breathing air channel into the breathing zone 20a and from the breathing air zone 20a through the recess 106a into the outlet region 40a. The recess 106a is arranged in a proximity of the mouth and/or nose region of the user 18a (FIG. 6).

Beyond this the mouth protection device 12a comprises a discharge valve 42a, which is configured to regulate a pressure in the breathing zone 20a to an at least approximately constant value. The discharge valve 42a 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 20a, respectively the outlet region 40a, relative to an environment. The discharge valve 42a is configured to permit, in particular maintain, a defined overpressure in the breathing zone 20a. Preferably the discharge valve 42a is implemented by a mechanical valve. The mask base body 16a is not completely sealed with respect to the face of the user 18a, such that air may also leave at a transition from the mask base body 16a to the face, besides the discharge valve 42a. If at the transition from the mask base body 16a to the face there is too much leakage or if the mouth protection device 12a is taken off, it is no longer possible for the pressure in the breathing zone 20a to be maintained and the pressure drops below the limit value of the discharge valve 42a. This may be detected by the blower device 14a, in particular by a load of the fan 48a, and if applicable a warning signal may be given to the user 18a. In this way faulty wearing of the mouth protection device 12a can be indicated to the user 18a automatically. Furthermore, the fan 48a may thus stop automatically when the mouth protection device 12a is put on. Under regular conditions, the pressure in the breathing zone 20a is regulated to an approximately constant value by means of the discharge valve 42a (FIG. 4).

It is also conceivable that the mask base body 16a comprises a subregion 44a which is implemented in an air-permeable fashion. The subregion 44a is in particular made of an air-permeable textile. The subregion 44a directly adjoins the outlet region 40a. The subregion 44a serves for a defined discharge of air in the outlet region 40a. The subregion 44a is provided in addition to the discharge valve 42a; it would however also be conceivable that only the subregion 44a is provided, the subregion 44a taking on the function of the discharge valve 42a.

In 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. In order to distinguish between the exemplary embodiments, 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. Regarding components having the same denomination, in particular regarding components having the same reference numerals, 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 14b of a respiratory protection system. The blower device 14b is configured for a generation of a breathing air flow 26b. The blower device 14b is configured for a generation of a breathing air flow 26b for a mouth protection device. The blower device 14b comprises a housing unit 58b. The housing unit 58b is implemented by a plastic housing. The housing unit 58b comprises two interconnected housing shells 70b, 72b, namely a first housing shell 70b and a second housing shell 72b. The housing unit 58b has a thickness of less than 70 mm.

The blower device 14b further comprises a fan 48b for generating an airflow 50b. The blower device 14b is configured to create an overpressure in the mouth protection device 12b. The fan 48b is configured to create an overpressure in the mouth protection device 12b. The fan 48b is implemented by an electrical radial fan.

The blower device 14b further comprises a filter element 52b. The filter element 52b is configured to be flown through by the airflow 50b. The filter element 52b is implemented by a rectangular-cuboid-shaped filter module. The filter element 52b is implemented by an aerosol filter. The filter element 52b is embodied as a depth filter, in particular as a lamellate filter. A main extent plane 54b of the filter element 52b extends at least substantially parallel to a main extent plane of the housing unit 58b. The filter element 52b is arranged in a lower region of the blower device 14b. The housing unit 58b accommodates the fan 48b and the filter element 52b.

Furthermore the blower device 14b comprises a further filter element 52′b. The further filter element 52′b is configured to be flown through by the airflow 50b. The further filter element 52′b is configured to be flown through by the airflow 50b before the filter element 52b. 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 58b. The further filter element 52′b is arranged in a lower region of the blower device 14b. The housing unit 58b accommodates the fan 48b, the filter element 52b and the further filter element 52′b. Air inlet openings 78b 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 52b.

The fan 48b is arranged next to the filter element 52b, the airflow 50b being deflected between the fan 48b and the filter element 52b. The further filter element 52′b is also arranged next to the fan 48b. The filter element 52b, the further filter element 52′b and the fan 48b are together arranged in the housing unit 58b.

The blower device 14b further comprises an air conveying channel 82b, which accommodates the filter element 52b and is configured for guiding the airflow 50b between the filter element 52b and the fan 48b. The air conveying channel 82b is implemented separately from the housing unit 58b. The housing unit 58b comprises a receptacle for a defined accommodation of the air conveying channel 82b. The air conveying channel 82b is implemented so as to be removable from the housing unit 58b. The air conveying channel 82b can be inserted in the housing unit 58b in a defined position. In a state when the air conveying channel 82b is inserted in the housing unit 58b, the air conveying channel 82b is directly coupled with an entry channel of the fan 48b. An outlet opening 114b of the air conveying channel 82b is coupled with the entry channel of the fan 48b in a sealing manner.

The filter element 52b is fixedly integrated in the air conveying channel 82b. The further filter element 52′b is fixedly integrated in the air conveying channel 82b. The air conveying channel 82b, the filter element 52b and the further filter element 52′b form a filter exchange module 110b. The filter exchange module 110b is implemented so as to be exchangeable as a whole via the cover 74b. The filter element 52b and the further filter element 52′b are at least partially connected to the air conveying channel 82b by substance-to-substance bond. The filter element 52b and the further filter element 52′b are glued in the air conveying channel 82b. The filter element 52b and the further filter element 52′b are glued in the air conveying channel 82b in a region of an inlet opening 112b. The air conveying channel 82b forms a filter frame of the filter element 52b and of the further filter element 52′b. The filter element 52b and the further filter element 52′b are arranged in a stacked fashion. The filter element 52b is arranged along the airflow 50b fluidically upstream of the fan 48b. The further filter element 52′b is arranged along the airflow 50b fluidically upstream of the filter element 52b. The airflow 50b between the fan 48b and the filter element 52b is deflected by at least approximately 90°. A deflection of the airflow 50b is brought about in the air conveying channel 82b. A flow-through direction r₁ of the airflow 50b through the filter element 52b is substantially different from a flow-through direction r₂ of the airflow 50b through the fan 48b. A flow-through direction r₃ of the airflow 50b through the further filter element 52′b is substantially different from the flow-through direction r₂ of the airflow 50b through the fan 48b. The flow-through direction r₃ of the airflow 50b through the further filter element 52′b corresponds essentially to the flow-through direction r₁ of the airflow 50b through the filter element 52b. The flow-through direction r₂ of the airflow 50b through the fan 48b runs parallel to a main extent plane 56b of the fan 48b. The flow-through direction r₁ of the airflow 50b through the filter element 52b runs perpendicularly to the main extent plane 54b of the filter element 52b. The flow-through direction r₃ of the airflow 50b 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 r₁ of the filter element 52b and the flow-through direction r₃ of the further filter element 52′b are angled by at least approximately 90° relative to the flow-through direction r₂ of the fan 48b. The air conveying channel 82b is configured for deflecting the airflow 50b between the fan 48b and the filter element 52b. The air conveying channel 82b has a bent air guidance. A flow-in direction r_L1 of the airflow 50b into the air conveying channel 82b is substantially different from a flow-out direction r_L2 of the airflow 50b out of the air conveying channel 82b. An angle included by the flow-in direction r_L2 of the airflow 50b into the air conveying channel 82b and the flow-out direction r_L2 of the airflow 50b out of the air conveying channel 82b amounts to at least approximately 90°.

REFERENCE NUMERALS

• 10 respiratory protection system
• 12 mouth protection device
• 14 blower device
• 16 mask base body
• 18 user
• 20 breathing zone
• 22 breathing air supply line
• 22′ breathing air supply line
• 24 breathing air channel
• 26 breathing air flow
• 28 fastening strap
• 30 head
• 32 connection unit
• 34 adjusting unit
• 36 side edge
• 38 separating layer
• 40 outlet region
• 42 discharge valve
• 44 subregion
• 46 breathing air line
• 48 fan
• 50 airflow
• 52 filter element
• 52′ filter element
• 54 main extent plane
• 54′ main extent plane
• 56 main extent plane
• 58 housing unit
• 60 vest
• 62 operating unit
• 64 operating element
• 66 control and/or regulation unit
• 68 sensor unit
• 70 housing shell
• 72 housing shell
• 74 cover
• 76 cover
• 78 air inlet opening
• 80 air outlet opening
• 82 air conveying channel
• 84 energy storage
• 86 control and/or regulation unit
• 88 cable
• 90 sealing element
• 92 coupling element
• 94 coupling element
• 96 actuation element
• 98 head-fastening strap
• 100 fastening unit
• 100 fastening unit
• 102 cord
• 104 cord clamp
• 106 recess
• 108 T-connection piece
• 110 filter exchange module
• 112 inlet opening
• 114 outlet opening
• d thickness
• r₁ flow-through direction
• r₂ flow-through direction
• r₃ flow-through direction
• r_L1 flow-in direction
• r_L2 flow-out direction

Claims

1. 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,

wherein 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, and wherein the filter element is arranged along the airflow fluidically upstream of the fan,

wherein

the housing unit has a thickness d of less than 70 mm, wherein the air conveying channel is realized so as to be removable from the housing unit, and wherein the at least one filter element is connected to the air conveying channel at least partly by substance-to-substance bond.

2. The blower device according to claim 1,

wherein

the air conveying channel and the at least one filter element form a filter exchange module.

3. (canceled)

4. The blower device according to claim 1,

wherein

the air conveying channel forms a filter frame of the at least one filter element.

5. The blower device according to claim 1,

wherein

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.

6. The blower device according to claim 1,

wherein

the air conveying channel has an inlet opening and an outlet opening, an opening cross section of the inlet opening being substantially larger than an opening cross section of the outlet opening (114a; 114b).

7. The blower device according to claim 1,

comprising a further filter element, which is situated next to the fan and which is fixedly integrated in the air conveying channel.

8. The blower device according to claim 7,

wherein

the air conveying channel, the filter element and the further filter element form a filter exchange module, in particular an alternative filter exchange module.

9. (canceled)

10. The blower device according to claim 1,

wherein

the fan is configured to create a volume flow of the airflow of at least 50 l/min and maximally 250 l/min.

11. A respiratory protection system, in particular a blower respiratory protection system, with a blower device according to claim 1 and with at least one mouth protection device.

12. The respiratory protection system according to claim 11,

wherein

the at least one blower device is configured to create a positive pressure in the mouth protection device.