RESPIRATORY PROTECTION SYSTEM WITH A BLOWER DEVICE

Description

State of the art

[0001] The invention relates to a blower device for a respiratory protection system.

[0002] A blower device for a respiratory protection system, comprising a fan for generating an air flow and comprising at least one filter element through which the air flow flows, has already been proposed.

[0003] WO 2011 / 006206 discloses a breathing apparatus comprising a mask and a neck component. The neck component is attached to the mask and encloses the user's neck. The neck component includes a flow generator for drawing in unfiltered air from the environment, filtering the unfiltered air, and delivering the filtered air to the mask.

[0004] US 2018 / 021605 discloses a positive pressure air filtration system that is particularly advantageous in the confined spaces of a mine with low ceiling heights. An air pump and air filtration unit is attached to a vest worn by the user and connected to a nose and mouth mask via an air hose located at the back of the vest. The mask has top and side edges shaped to fit against the user's face immediately above the nose and extend to the user's cheeks.

[0005] The object of the invention is, in particular, to provide a generic device with improved properties in terms of compactness and comfort. This object is achieved according to the invention by the features of patent claim 1, while advantageous embodiments and further developments of the invention can be found in the subclaims. Advantages of the invention

[0006] The invention relates to a blower device for a respiratory protection system, comprising a fan for generating an air flow and at least one filter element which is intended to be flowed through by the air flow.

[0007] It is proposed that the fan is arranged at least partially next to the at least one filter element, wherein the air flow is deflected between the fan and the filter element. Preferably, the filter element and the fan are arranged in a common housing. Preferably, the housing forms defined channels for guiding the air flow. Preferably, the air flow is deflected between the fan and the filter element by at least 50°, preferably by at least 90°, preferably by at least 140°, and particularly preferably by at least 180°. The blower device is formed in particular by a compact blower device. The blower device is intended in particular to be worn on the body, for example on the back and / or on the hip.

[0008] In this context, a "blower device" is understood to mean, in particular, a device that is intended to actively generate an air flow to a user's breathing air supply. The blower device is intended, in particular, to supply the air flow to a face mask device of the respiratory protection system during operation. Preferably, the blower device is connected to the face mask device of the respiratory protection system via at least one breathing air supply line. Preferably, the blower device is intended, in particular, to draw in air from an environment, purify the air, in particular to filter it, and actively supply the purified air to a user, in particular via the face mask device. Preferably, the blower device is intended to generate an active air flow. The blower device is intended, in particular, to generate an overpressure air flow.The fan is intended, in particular, to actively generate an air flow during operation. The fan is intended, in particular, to actively draw in air from the environment and to actively transport the air to the face mask device of the respiratory protection system. The fan is formed, in particular, by an axial fan and / or a radial fan. In this context, a "filter element" is understood, in particular, to mean an element that is intended, during operation, to filter the air flow. For this purpose, the filter element preferably has a filter through which the air flow flows during operation. The air flow preferably flows completely through the filter of the filter element. The filter element is intended, in particular, to separate particles, in particular suspended matter, from the air flow. Various filters that a person skilled in the art would deem appropriate are conceivable.Preferably, the filter of the filter element is formed, in particular, by a suspended matter filter. The filter is preferably designed as a depth filter or cake filter, in particular as a lamella filter.

[0009] In this context, the term "the fan is arranged at least partially adjacent to the at least one filter element" should be understood in particular to mean that the fan is free from complete overlap with the filter element in a direction perpendicular to a main extension plane of the fan. Preferably, a normal vector of the main extension plane of the fan, which passes through a geometric center of the fan, is free from an intersection point with the filter element. Preferably, the fan and the filter element are arranged adjacent to one another in a main extension plane of the blower device. Preferably, the fan and the filter element are designed to be at least substantially free, in particular completely free, from mutual overlap when viewed perpendicular to the main extension plane of the blower device.A "main extension plane" of a structural unit is understood to mean, in particular, a plane that is parallel to the largest side surface of the smallest imaginary cuboid that just completely encloses the structural unit, and in particular, runs through the center of the cuboid. "At least substantially" in this context is understood to mean, in particular, that a deviation from a specified value is less than 25%, preferably less than 10%, and particularly preferably less than 5% of the specified value.

[0010] In this context, the term "the air flow is deflected between the fan and the filter element" should be understood in particular to mean that the air flow changes direction on a path between the filter element and the fan during operation of the blower device. The direction of the air flow should be understood in this context in particular to mean an averaged direction of movement of the particles of the air flow at a point. Preferably, a guide channel is arranged between the filter element and the fan, which guides the air flow, wherein the guide channel is designed for a defined deflection of the air flow. Preferably, the guide channel forms a deflection between the filter element and the fan. The deflection can, for example, take the form of a curve, a bend, a kink, or the like.Preferably, an inflow axis and / or an inflow direction of the air flow into the guide channel is significantly different and / or significantly offset from an outflow axis and / or an outflow direction of the air flow from the guide channel. "Intended" is understood to mean, in particular, being specially programmed, designed, and / or equipped. The fact that an object is intended for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state.

[0011] The design according to the invention makes it possible to provide, in particular, an advantageously compact, particularly flat, blower device. In particular, direct stacking of the fan and the filter unit can be dispensed with. This allows, in particular, an advantageously low overall height of the blower device to be achieved.

[0012] According to the invention, a flow direction of the air flow through the filter element is substantially different from a flow direction of the air flow through the fan. Preferably, the flow direction of the air flow through the fan runs perpendicular or parallel to a main extension plane of the fan. Preferably, the flow direction of the air flow through the filter element runs perpendicular to a main extension plane of the filter element. Preferably, the flow direction of the filter element is angled relative to the flow direction of the fan by at least 50°, preferably by at least 90°, preferably by at least 140°, and particularly preferably by at least 180°. Preferably, the flow direction of the filter element is at least approximately opposite to the flow direction of the fan. This makes it possible, in particular, to deflect the air flow.This advantageously makes it possible to provide, in particular, an advantageously compact, particularly flat, fan device. In particular, direct stacking of the fan and the filter unit can be avoided.

[0013] In this way, an advantageously low overall height of the blower device can be achieved.

[0014] Furthermore, it would be conceivable for the flow direction of the air flow through the filter element to be at least substantially opposite to the flow direction of the air flow through the fan. In this context, "at least substantially opposite" should be understood in particular to mean that a directional vector of the flow direction of the air flow through the fan forms a smallest angle of at least 140°, preferably at least 160°, and particularly preferably at least approximately 180°, with the directional vector of the flow direction of the air flow through the filter element. This makes it possible, in particular, to achieve an advantageous arrangement of the fan and the filter element next to one another. This makes it possible, in particular, to provide an advantageously compact, in particular flat, blower device. In particular, direct stacking of the fan and the filter unit can be avoided.In this way, an advantageously low overall height of the blower device can be achieved.

[0015] According to the invention, the at least one filter element has a main extension plane and the fan has a main extension plane, wherein a distance between the main extension plane of the filter element and the main extension plane of the fan is less than a maximum thickness of the filter element. The filter element preferably extends parallel to the fan. Preferably, a distance between the main extension plane of the filter element and the main extension plane of the fan is less than 50 mm, preferably less than 30 mm, and particularly preferably less than 10 mm. Preferably, the main extension plane of the filter element and the main extension plane of the fan are arranged in one plane. This makes it possible, in particular, to achieve an advantageously compact arrangement of the fan and the filter element. This makes it possible, in particular, to provide an advantageously compact, in particular flat, blower device.

[0016] It is further proposed that the at least one filter element has a main extension plane and the fan has a main extension plane, wherein at least a majority of normal vectors of the main extension plane of the filter element intersecting the filter element are free of an intersection point with the fan. Preferably, all normal vectors of the main extension plane of the filter element intersecting the filter element are free of an intersection point with the fan. The filter element and the fan can in particular be arranged next to one another both parallel to one another and partially angled to one another. Preferably, an angle between the main extension plane of the filter element and the main extension plane of the fan is more than 80°, preferably more than 120°, and particularly preferably more than 160°."At least a majority of the normal vectors intersecting the filter element" refers in particular to the normal vectors that intersect more than 50%, preferably more than 70%, and particularly preferably more than 90% of a main extension area of ​​the filter element. This allows, in particular, an advantageously compact arrangement of the fan and the filter element to be achieved. This allows, in particular, an advantageously compact, particularly flat, blower device to be provided.

[0017] It is further proposed that the blower device has a further filter element which is arranged next to the fan and / or next to the one filter element and whose flow direction of the air flow differs from a flow direction of the air flow through the fan and / or the filter element. Preferably, the further filter element is arranged next to the fan and next to the filter element. Furthermore, the flow direction of the air flow through the further filter element is preferably different from a flow direction of the air flow through the fan. This makes it possible, in particular, to achieve an advantageously compact arrangement of the fan, the filter element and a further filter element. This makes it possible, in particular, to provide an advantageously compact, in particular flat, blower device.

[0018] It is further proposed that the at least one filter element has a main extension plane and the fan has a main extension plane, wherein the main extension plane of the filter element is angled relative to the main extension plane of the fan. Preferably, an angle between the main extension plane of the filter element and the main extension plane of the fan is more than 45°, preferably more than 60°, and particularly preferably more than 75°. Preferably, a normal vector of the main extension plane of the filter element intersecting the filter element and a normal vector of the main extension plane of the fan intersecting the fan encloses an angle of a maximum of 90° and at least 5°. Preferably, a line of intersection between the main extension plane of the filter element and the main extension plane of the fan runs at least in a close region of the filter element and the fan.The minimum distance between the intersection line and the filter element is in particular less than 15 cm, preferably less than 10 cm, and particularly preferably less than 5 cm. This allows for an advantageously compact arrangement of the fan and the filter element. This allows for an advantageously compact, particularly flat, blower device to be provided.

[0019] According to the invention, the blower device comprises a housing unit accommodating the fan and the at least one filter element, which housing unit has a thickness of less than 70 mm. The housing unit preferably has a thickness of less than 50 mm. The housing unit serves, in particular, to protect and align the fan and the filter element. Preferably, the blower device also comprises an energy storage device for supplying energy to the fan, which energy storage device is also accommodated in the housing unit. In this context, a "thickness" of the housing unit is to be understood, in particular, as a maximum extension of the housing unit perpendicular to a main extension plane of the housing unit. This makes it possible, in particular, to provide an advantageously compact blower device.

[0020] It is further proposed that the fan be designed to generate an air flow volume of at least 50 l / min and a maximum of 250 l / min. Preferably, the fan is designed to generate an air flow volume of at least 80 l / min and a maximum of 120 l / min. This makes it possible, in particular, to provide an advantageously compact and powerful blower device.

[0021] According to the invention, the invention is based on a respiratory protection system, in particular a blower-type respiratory protection system, comprising a blower device and at least one face mask. It is proposed that the at least one blower device be provided for generating an overpressure in the face mask. Preferably, the at least one blower device is provided for generating a relative overpressure in the face mask relative to the surroundings. In this context, a "respiratory protection system" is to be understood in particular as a system comprising a blower device and a face mask, which is provided for actively providing an air flow to a user's breathing air supply. The respiratory protection system is particularly intended to generate an air flow during operation by means of a blower device, which air flow is supplied to the face mask of the respiratory protection system.The blower device is preferably connected to the face mask device of the respiratory protection system via at least one breathing air supply line. The respiratory protection system is preferably designed to draw air from an environment during operation by means of the blower device, to purify, in particular filter, the air, and to actively supply the purified air to a user by means of the face mask device. In this context, a "face mask device" is to be understood in particular as a device forming a face mask, which is intended to be worn at least in the mouth and / or nose area of ​​a user. The device is preferably designed to form a breathing area in front of the mouth and / or nose area of ​​a user, which is continuously supplied with breathing air during operation.The face mask device is preferably designed to directly supply a user with breathable air and to protect the mouth and / or nose area of ​​a user from external influences, in particular from gases, particles, and / or suspended matter. The face mask device is preferably free from any covering of the eyes, in particular the eye area, of a user. The face mask device preferably comprises a mask base body, which is designed to cover a mouth and / or nose area of ​​a user and which at least partially delimits a breathing area, and at least one breathing air supply line connected to the mask base body, which delimits at least one breathing air channel opening into the breathing area and is designed to guide an active breathing air flow. This makes it possible, in particular, to provide an advantageously comfortable respiratory protection system. In particular, a reliable breathing air supply can be achieved.

[0022] According to the invention, the respiratory protection system comprises a vest for wear by a user, on the back of which the blower device is arranged. Preferably, the blower device is detachably connected to the vest. This ensures, in particular, an advantageously comfortable wearing of the respiratory protection system. Furthermore, an advantageous arrangement of the blower device can be achieved. In particular, slipping of the blower device can be prevented.

[0023] It is further proposed that the respiratory protection system have an external operating unit, which has at least one operating element and at least one control and / or regulating unit, which is provided for controlling and / or regulating the blower device. The external operating unit is preferably connected to the blower device via a radio connection and / or via a cable. The external operating unit is formed, in particular, by a remote control. However, it would also be conceivable for the external operating unit to be formed by a smartphone or the like. An "operating unit" is to be understood here, in particular, as a unit that has at least one operating element that can be actuated directly by a user and that is intended to influence and / or change a process and / or a state of a unit coupled to the operating unit by actuation and / or by inputting parameters.An "operating element" is understood in particular to mean an element that is intended to receive an input from an operator during an operating process and, in particular, to be contacted directly by a user, whereby a touch of the operating element is sensed and / or an actuating force exerted on the operating element is sensed and / or mechanically transmitted to actuate a unit. A "control and / or regulating unit" is understood in particular to mean a unit with at least one control electronics unit. "Control electronics" is understood in particular to mean a unit with a processor unit and a memory unit, as well as with an operating program stored in the memory unit. This makes it possible, in particular, to achieve advantageously convenient control of the blower device.

[0024] It is further proposed that the external operating unit has at least one sensor unit for detecting at least one environmental parameter, wherein the control and / or regulating unit is provided in at least one operating state for controlling and / or regulating the blower device based on the at least one environmental parameter. Various environmental parameters that appear appropriate to a person skilled in the art are conceivable. Preferably, the sensor unit is used to detect, for example, air quality, ambient pressure, oxygen concentration, or the like. The external operating unit is intended in particular to be worn by a user on a chest. Therefore, the sensor unit can be used to detect, in particular, environmental parameters in a head region of the user.In this context, a "sensor unit" is understood to mean, in particular, a unit designed to record at least one parameter and / or one physical property. Recording can be done actively, such as by generating and transmitting an electrical measurement signal, and / or passively, such as by detecting changes in the properties of a sensor component. Various sensor units that would be considered appropriate by a person skilled in the art are conceivable. This makes it possible, in particular, to achieve effective control and / or regulation of the blower device. In particular, it is possible to achieve customized operation of the blower device. Furthermore, it would be conceivable for a user to be warned, for example, of dangerous situations.

[0025] The blower device, the respiratory protection system, and / or the external control unit according to the invention are not intended to be limited to the application and embodiment described above. In particular, the blower device, the respiratory protection system, and / or the external control unit according to the invention may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily. Drawings

[0026] Further advantages will become apparent from the following description of the drawings. The drawings illustrate two exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0027] They show: Fig. 1 shows a respiratory protection system with a blower device, with a mouth guard, with a vest and with an external control unit and a user in a schematic representation, Fig. 2 shows the blower device of the respiratory protection system in a schematic plan view, Fig. 3 shows the blower device of the respiratory protection system, with a fan and with a filter element in a schematic sectional representation along the section line II-II, Fig. 4 shows the mouth guard of the respiratory protection system and a user's head in a schematic representation, Fig. 5 shows the mouth guard of the respiratory protection system in a schematic partial sectional representation, Fig. 6 shows a partial section of the mouth guard of the respiratory protection system in a schematic sectional representation and Fig. 7 shows 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 representation. Description of the embodiments

[0028] The Figure 1shows a respiratory protection system 10a. The respiratory protection system 10a is formed by a blower respiratory protection system. The respiratory protection system 10a is formed, in particular, by a blower respiratory protection system of safety class TH3. The respiratory protection system 10a is intended to protect a user 18a from particles such as smoke, aerosols, and / or dust. Furthermore, the respiratory protection system 10a can additionally protect against unpleasant odors and harmful ozone. In particular, it is conceivable that the respiratory protection system 10a protects the user 18a from organic, inorganic, and / or acidic gases in environments with harmful or even toxic gases. The respiratory protection system 10a has a blower device 14a and a mouth guard device 12a. The blower device 14a is intended to generate a breathing air flow 26a. The blower device 14a is provided for generating a breathing air flow 26a for the mouth guard device 12a.

[0029] The blower device 14a has a housing unit 58a. The housing unit 58a is formed from a plastic housing. The housing unit 58a has two interconnected housing shells 70a, 72a, namely a first housing shell 70a and a second housing shell 72a. The first housing shell 70a has two openable covers 74a, 76a, through which an interior of the housing unit 58a can be made accessible. The second housing shell 72a forms a rear side of the housing unit 58a, which, when worn, faces the user 18a. The second housing shell 72a has a concave curve on an outer side. The curvature of the second housing shell 72a is adapted to the curvature of a person's back. Furthermore, the housing unit 58a has a plurality of air inlet openings 78a. The air inlet openings 78a are formed by slots in the first housing shell 70a.The air inlet openings 78a serve, during operation, to draw in ambient air by means of an air flow 50a. Furthermore, the housing unit 58a has an air outlet opening 80a. The air outlet opening 80a is formed by a hose connection piece on the first housing shell 70a. The air outlet opening 80a serves, during operation, to discharge the purified air flow 50a, in particular a breathing air flow 26a. The breathing air flow 26a is forwarded from the air outlet opening 80a to the mouth guard device 12a (Fig. Figure 1 , 2 ).

[0030] 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.

[0031] Furthermore, the blower device 14a has a fan 48a for generating an air flow 50a. The blower device 14a is provided for generating an overpressure in the face mask device 12a. The fan 48a is provided for generating an overpressure in the face mask device 12a. The fan 48a is provided for generating a volume flow of the air flow 50a of at least 50 l / min and a maximum of 250 l / min. The fan 48a is provided for generating a volume flow of the air flow 50a of at least 80 l / min and a maximum of 120 l / min. During operation, the blower device 14a, by means of the fan 48a, is provided for generating a relative overpressure relative to the surroundings in the face mask device 12a. The fan 48a is formed by an electric radial fan. In principle, however, another configuration that would appear appropriate to a person skilled in the art would also be conceivable. The fan 48a is arranged in the housing unit 58a.A main extension plane 56a of the fan 48a extends at least substantially parallel to a main extension 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 output side of the fan 48a. The blower device 14a further comprises a control and / or regulating unit 86a for controlling and / or regulating the fan 48a during operation. The control and / or regulating unit 86a is provided, in particular, for automatically adjusting a power level of the fan 48a. The control and / or regulating unit 86a is provided to set an air flow level of the fan 48a depending on a saturation of a filter element 52a. Furthermore, the control and / or regulating unit 86a is provided, in particular, for automatically controlling and adjusting the air flow. Figure 3 ).

[0032] Furthermore, the blower device 14a has the filter element 52a. The filter element 52a is intended to be flowed through by the air stream 50a. The filter element 52a is formed by a cuboid-shaped filter module. The filter element 52a is formed by a particulate filter. The filter element 52a is designed as a depth filter, in particular as a lamella filter. However, it would also be conceivable for the filter element 52a to be designed as a gas filter, in particular as an A1 B1 E1 gas filter. The filter element 52a is arranged in the housing unit 58a. A main extension plane 54a of the filter element 52a extends at least substantially parallel to a main extension 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. The air inlet opening 78a is arranged on an inlet side of the filter element 52a.Furthermore, the filter element 52a is designed to be replaceable via the cover 74a (. Figure 3 ).

[0033] The fan 48a is arranged next to the filter element 52a, with the air flow 50a being deflected between the fan 48a and the filter element 52a. The filter element 52a and the fan 48a are arranged together in the housing unit 58a. The housing unit 58a has an air duct 82a which accommodates the filter element 52a and is provided for guiding the air flow 50a between the filter element 52a and the fan 48a. The filter element 52a is arranged fluidically along the air flow 50a in front of the fan 48a. The air flow 50a between the fan 48a and the filter element 52a is deflected by at least approximately 90°. The air flow 50a is deflected in the air duct 82a. However, it would also be conceivable to dispense with an air duct 82a. A flow direction r 1 of the air flow 50a through the filter element 52a is essentially different from a flow direction r 2 of the air flow 50a through the fan 48a.The flow direction r 2 of the air flow 50a through the fan 48a runs parallel to the main extension plane 56a of the fan 48a. However, if the fan 48a is designed as an axial fan, it would also be conceivable for the flow direction r 2 of the air flow 50a through the fan 48a to run perpendicular to the main extension plane 56a of the fan 48a. The flow direction r 1 of the air flow 50a through the filter element 52a runs perpendicular to the main extension plane 54a of the filter element 52a. The flow direction r 1 of the filter element 52a is angled by at least approximately 90° relative to the flow direction r 2 of the fan 48a (. Figure 3 ).

[0034] The filter element 52a has the main extension plane 54a. The fan 48a has the main extension plane 56a. It would be conceivable for the main extension plane 54a to run parallel to the main extension plane 56a, wherein a distance between the main extension plane 54a of the filter element 52a and the main extension plane 56a of the fan 48a is less than a maximum thickness of the filter element 52a. In a parallel configuration, a distance between the main extension plane 54a of the filter element 52a and the main extension plane 56a of the fan 48a would preferably be less than 50 mm, preferably less than 30 mm, and particularly preferably less than 10 mm. In the illustrated embodiment, the main extension plane 54a of the filter element 52a is angled relative to the main extension plane 56a of the fan 48a.An angle between the main extension plane 54a of the filter element 52a and the main extension plane 56a of the fan 48a is more than 80°, preferably more than 120°, and particularly preferably more than 160°. The angle between the main extension plane 54a of the filter element 52a and the main extension plane 56a of the fan 48a is at least approximately 165°. A normal vector of the main extension plane 54a of the filter element 52a intersecting the filter element 52a and a normal vector of the main extension plane 56a of the fan 48a intersecting the fan 48a enclose a smallest angle of at least approximately 15°.Preferably, the main extension plane 56a of the fan 48a and the main extension plane 54a of the filter element 52a form a smallest angle of at least 60°, preferably at least 70°, with an imaginary plane in which the intersection line between the main extension plane 56a of the fan 48a and the main extension plane 54a of the filter element 52a runs and which lies symmetrically between the filter element 52a and the fan 48a. Preferably, a line of intersection between the main extension plane 54a of the filter element 52a and the main extension plane 56a of the fan 48a runs in a close region of the filter element 52a and the fan 48a. The smallest distance between the line of intersection and the filter element 52a is in particular less than 15 cm, preferably less than 10 cm, and particularly preferably less than 5 cm.A smallest distance between the intersection line and the filter element 52a is smaller than a smallest distance between the fan 48a and the filter element 52a. At least a majority of the normal vectors of the main extension plane 54a of the filter element 52a that intersect the filter element 52a are free of an intersection point with the fan 48a. All normal vectors of the main extension plane 54a of the filter element 52a that intersect the filter element 52a are free of an intersection point with the fan 48a. The filter element 52a and the fan 48a are arranged next to one another, partially at an angle to one another (. Figure 3 ).

[0035] Furthermore, the blower device 14a has an energy storage device 84a. The energy storage device 84a is formed by an accumulator. The energy storage device 84a serves to supply energy to the fan 48a. A main extension plane of the energy storage device 84a extends at least substantially parallel to a main extension plane of the housing unit 58a. The energy storage device 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 device 84a. The housing unit 58a serves to protect and align the fan 48a, the filter element 52a, and the energy storage device 84a. Furthermore, the energy storage device 84a is designed to be replaceable via the cover 76a ( Figure 3 ).

[0036] The respiratory protection system 10a further comprises an external operating unit 62a. The external operating unit 62a is formed by a remote control. The operating unit 62a comprises operating elements 64a and a control and / or regulating unit 66a, which is provided for controlling and / or regulating the blower device 14a. The external operating unit 62a is connected, for example, to the blower device 14a by means of a cable 88a. The control and / or regulating unit 66a of the external operating unit 62a is provided, in particular, to control the control and / or regulating unit 86a of the blower device 14a depending on an input at the operating elements 64a. For example, a power level of the fan 48a can be set via the operating elements 64a. Furthermore, the fan 48a can be activated or deactivated via the operating elements 64a. The external control unit 62a further comprises a sensor unit 68a for detecting environmental parameters.The control and / or regulating unit 66a is provided, in at least one operating state, for controlling and / or regulating the blower device 14a based on the ambient parameters. The control and / or regulating unit 66a is provided, in one operating state, for controlling the control and / or regulating unit 86a of the blower device 14a, wherein a power level of the fan 48a is adjusted based on the ambient parameters by means of the control and / or regulating unit 86a of the blower device 14a. The sensor unit 68a is provided for detecting air quality, ambient pressure, and / or oxygen concentration.

[0037] Furthermore, the respiratory protection system 10a comprises a vest 60a for wear by a user 18a. The vest 60a is formed from a fabric vest. The blower device 14a is arranged on a back of the vest 60a. The blower device 14a is detachably connected to the vest 60a. The blower device 14a is worn on the back of a user 18a during operation using the vest 60a. Furthermore, the external control unit 62a is intended to be worn on the chest by a user 18a. The external control unit 62a is arranged on a front of the vest 60a. Therefore, environmental parameters in a head region of the user 18a can be detected, in particular, using the sensor unit 68a.

[0038] The respiratory protection system 10a further comprises a breathing air line 46a connected to the blower device 14a, which is provided for guiding the breathing air flow 26a. The breathing air line 46a connects the blower device 14a to the face mask 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 formed by a hose. The breathing air line 46a is provided for guiding the breathing air flow 26a during operation.

[0039] The mouth protection device 12a has a mask base body 16a. The mask base body 16a is intended to cover a mouth and nose area of ​​the user 18a. Furthermore, the mask base body 16a is intended to at least partially delimit a breathing area 20a. During operation, the mask base body 16a, together with a face of the user 18a and a separating layer 38a, delimits the breathing area 20a. The mask base body 16a consists at least largely of a pliable material. The mask base body 16a consists entirely of a pliable material. The mask base body 16a consists entirely of a dimensionally unstable material. The mask base body 16a consists at least largely of a textile material. The mask base body 16a consists entirely of a textile material. The mask base body 16a is made entirely of a textile. The mask base body 16a is made entirely of a textile.The mask base body 16a is designed to be at least substantially airtight. It would be particularly conceivable for a textile from which the mask base body 16a is made to have a coating that at least reduces air permeability. The mask base body 16a is airtight, in particular, at least at an absolute pressure of 1 bar, preferably at least 2 bar, and particularly preferably at least 3 bar. Figure 4 ).

[0040] The face mask device 12a further comprises a sealing element 90a. The sealing element 90a is firmly 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 intended to seal the mask base body 16a, at least at an upper edge of the mask base body 16a, against a face of the user 18a. The sealing element 90a is intended to seal the breathing area 20a and an outlet area 40a toward the eyes of the user 18a in order to prevent air flow into the eyes of the user 18a. The sealing element 90a consists of a foam. The sealing element 90a is formed by a foam strip. The sealing element 90a is, for example, glued to the mask base body 16a ( Figure 6 ).

[0041] Furthermore, the face mask device 12a has a breathing air supply line 22a connected to the mask base body 16a. The breathing air supply line 22a delimits a breathing air channel 24a that opens into the breathing area 20a and is provided for guiding the active breathing air flow 26a. The breathing air supply line 22a is formed by an elastic hose. The breathing air supply line 22a has, for example, an oval cross-section. However, another cross-section for the breathing air supply line 22a that would be deemed appropriate by a person skilled in the art would also be conceivable, such as a circular cross-section. The breathing air supply line 22a extends from the breathing air line 46a to the breathing area 20a.

[0042] Furthermore, the face mask device 12a has a further breathing air supply line 22'a, redundant to the breathing air supply line 22a and connected to the mask base body 16a. The further breathing air supply line 22'a delimits a further breathing air channel opening into the breathing area 20a, which is provided for guiding an active breathing air flow 26a. The further breathing air supply line 22'a is formed by an elastic hose. The further breathing air supply line 22'a has, for example, an oval cross-section. The further breathing air supply line 22'a extends from the breathing air line 46a to the breathing area 20a. The further breathing air supply line 22'a is arranged on a side of the mask base body 16a facing away from the breathing air supply line 22a. The breathing air supply lines 22a, 22'a are intended to be guided past different sides of a head 30a of the user 18a.The additional breathing air supply line 22'a has a redundant function to the breathing air supply line 22a. The additional breathing air supply line 22'a serves to increase the reliability of the supply of the breathing air flow 26a. The breathing air supply line 22a and the additional breathing air supply line 22'a each function independently of one another.

[0043] The breathing air line 46a connected to the blower device 14a is provided for guiding the breathing air flow 26a to the breathing air supply lines 22a, 22'a. The breathing air line 46a is further provided for dividing the breathing air flow 26a between the breathing air supply line 22a and the additional breathing air supply line 22'a. The breathing air line 46a is coupled to the breathing air supply line 22a and the additional breathing air supply line 22'a via a T-connector 108a. The T-connector 108a is provided for placement in a neck region of the user 18a.

[0044] The face mask device 12a further comprises a fastening strap 28a for securing the mask base body 16a to the head 30a of the user 18a. The fastening strap 28a is formed from an elastic band, such as, in particular, a rubber band. The fastening strap 28a has a width that at least approximately corresponds to the width of the breathing air supply line 22a. Furthermore, an effective length of the fastening strap 28a is adjustable. The fastening strap 28a extends from a first end of the mask base body 16a to an opposite second end of the mask base body 16a. The fastening strap 28a extends from a first end of the mask base body 16a, at which the breathing air supply line 22a is connected to the mask base body 16a, to an opposite second end of the mask base body 16a, at which the further breathing air supply line 22'a is connected to the mask base body 16a.The fastening strap 28a is designed to be guided around the back of the head, in particular in the neck area, when the face mask device 12a is worn. The face mask device 12a has at least one connecting unit 32a for simultaneously plugging the fastening strap 28a and the at least one breathing air supply line 22a, 22'a to the mask base body 16a. The face mask device 12a has the connecting unit 32a and a further connecting unit (not shown) for simultaneously plugging the fastening strap 28a, each to the breathing air supply line 22a and the further breathing air supply unit 22'a to the mask base body 16a. The connecting units 32a serve to pull or remove the face mask device 12a. Coupling of the connecting units 32a occurs, for example, by means of a plug-in movement.The connecting units 32a each have 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 connecting units 32a each form, for example, an interface receptacle, while the second coupling elements 94a of the connecting units 32a each form an interface extension. The first coupling elements 92a of the connecting units 32a are each firmly connected to the mask base body 16a at opposite ends. The second coupling element 94a of the connecting unit 32a is firmly connected to a first end of the fastening strap 28a and the breathing air supply line 22a. The further second coupling element of the further connecting unit is firmly connected to a second end of the fastening strap 28a and the further breathing air supply line 22a.The first coupling elements 92a of the connecting units 32a are each formed by a hose connection. The first coupling elements 92a of the connecting units 32a are each provided to engage with the second coupling elements 94a of the connecting units 32a. The second coupling elements 94a of the connecting units 32a each have actuating elements 96a for releasing the engaging connection (. Figure 1 , 5 ).

[0045] The face mask device 12a has a head fastening strap 98a for additionally securing the mask base body 16a to the head 30a of the user 18a. Furthermore, an effective length of the head fastening strap 98a is adjustable. The head fastening strap 98a extends from a first end of the mask base body 16a to an opposite second end of the mask base body 16a. The head fastening strap 98a extends from a first end of the mask base body 16a, at which the breathing air supply line 22a is connected to the mask base body 16a, to an opposite second end of the mask base body 16a, at which the further breathing air supply line 22'a is connected to the mask base body 16a. The head fastening strap 98a is intended to be guided around the back of the head, in particular the top of the head, when the face mask device 12a is worn.The face mask device 12a has a fastening unit 100a and a further fastening unit 100'a for an adjustable fastening of the head fastening strap 98a at the ends to the mask base body 16a. The head fastening strap 98a is guided through recesses on the fastening units 100a, 100'a for an adjustable fastening.

[0046] Furthermore, the face mask device 12a has an adjustment unit 34a, by means of which at least one effective length of a side edge 36a of the mask base body 16a is at least partially adjustable. By means of the adjustment unit 34a, an effective length of a side edge 36a of the mask base body 16a is adjustable from the first end, at which the first coupling element 92a is arranged, to the second end, at which the further first coupling element 92'a is arranged. The side edge 36a runs essentially parallel to a main extension direction of the mask base body 16a. The adjustment unit 34a comprises a cord 102a, in particular an elastic cord, and a cord clamp 104a. The cord 102a of the adjustment 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 opposite the first end.The cord 102a is attached to the first end and the second end. The cord clamp 104a allows for manually adjusting the effective length of the cord 102a, and thus also of the side edge 36a of the mask base body 16a. In particular, by forming loops of different sizes in the cord 102a, the effective length of the cord 102a can be manually adjusted by means of the cord clamp 104a.

[0047] Furthermore, the mouthguard device 12a has a separating layer 38a connected to the mask base body 16a, which is provided for at least partially separating the breathing area 20a from an outlet area 40a. The outlet area 40a is at least partially delimited by the mask base body 16a. The outlet area 40a is arranged below the breathing area 20a. In an operating state, the mask base body 16a, together with the face of the user 18a, delimits a spatial area which is divided by the separating layer 38a into a breathing area 20a and an outlet area 40a. The separating layer 38a, together with the mask base body 16a, forms a channel which at least partially forms the breathing area 20a and extends to a central area of ​​the mouthguard device 12.The channel formed by the separating layer 38a extends from the breathing air channel 24a and the further breathing air channel to a user's mouth and / or nose area. In the user's mouth and / or nose area, the breathing area 20a merges into the outlet area 40a. The separating layer 38a is formed integrally with the mask base body 16a. The separating layer 38a protrudes perpendicular to the mask base body 16a between the breathing area 20a and the outlet area 40a. The separating layer 38a has a recess 106a in a central region, which connects the breathing area 20a to the outlet area 40a. The separating layer 38a consists at least substantially of a textile material. The separating layer 38a consists entirely of a textile. The separating layer 38a is intended for a defined air flow.The separating layer 38a is intended to guide the breathing air flow 26a past the mouth and / or nose area of ​​a user 18a before reaching the outlet area 40a. For this purpose, the separating layer 38a has a recess 106a in the central area, which connects the breathing area 20a to the outlet area 40a. During operation, the breathing air flow 26a flows from the breathing air channel 24a and the further breathing air channel into the breathing area 20a and from there through the recess 106a into the outlet area 40a. The recess 106a is arranged in the vicinity of the mouth and / or nose area of ​​a user 18a (. Figure 6 ).

[0048] In addition, the mouthguard device 12a has a release valve 42a, which is intended to regulate a pressure in the breathing area 20a to an at least approximately constant value. The release valve 42a is formed by a pressure relief valve, in particular a one-way pressure relief valve, which is intended to open to the environment as of a defined overpressure in the breathing area 20a or the outlet area 40a. The release valve 42a is intended to allow, in particular to maintain, a defined overpressure in the breathing area 20a. Preferably, the release valve 42a is formed by a mechanical valve. The mask base body 16a is not completely sealed against the face of the user 18a, so that in addition to the release valve 42a, air can also escape at a transition from the mask base body 16a to the face.If the leak is too large or if the face mask 12a is removed at the transition from the mask body 16a to the face, the pressure in the breathing area 20a can no longer be maintained and the pressure falls below the limit value of the release valve 42a. This can be detected by the blower device 14a, in particular based on the load of the fan 48a, and a warning signal can be issued to the user 18a if necessary. The user 18a can thus be automatically alerted to incorrect wearing of the face mask 12a. Furthermore, the fan 48a can stop automatically when the face mask 12a is put on. Under normal conditions, the pressure in the breathing area 20a is regulated to an approximately constant value by means of the release valve 42a. Figure 4 ).

[0049] Furthermore, it is also conceivable for the mask base body 16a to have a partial region 44a that is designed to be permeable to air. The partial region 44a is made, in particular, of an air-permeable textile. The partial region 44a directly borders the outlet region 40a. The partial region 44a serves to release air in the outlet region 40a in a defined manner. The partial region 44a is provided in addition to the release valve 42a; however, it would also be conceivable for only the partial region 44a to be provided, with the partial region 44a assuming the function of the release valve 42a.

[0050] In the Figure 7 A further embodiment of the invention is shown. The following descriptions are essentially limited to the differences between the embodiments, whereby with regard to the same components, features and functions, reference is made to the description of the embodiment of the Figures 1 to 6To distinguish the embodiments, the letter a in the reference numerals of the embodiment in the Figures 1 to 6 by the letter b in the reference numerals of the embodiment of the Figure 7 With regard to components with the same designation, in particular with regard to components with the same reference numerals, reference can generally also be made to the drawings and / or the description of the embodiment of the Figures 1 to 6 be referred to.

[0051] Figure 7 shows a blower device 14b of a respiratory protection system. The blower device 14b is designed to generate a breathing air flow 26b. The blower device 14b is designed to generate a breathing air flow 26b for a face mask device.

[0052] The blower device 14b has a housing unit 58b. The housing unit 58b is formed from a plastic housing. The housing unit 58b has 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 d of less than 70 mm.

[0053] Furthermore, the blower device 14b has a fan 48b for generating an air flow 50b. The blower device 14b is provided for generating an overpressure in the mouthguard device 12b. The fan 48b is provided for generating an overpressure in the mouthguard device 12b. The fan 48b is formed by an electric radial fan.

[0054] Furthermore, the blower device 14b has a filter element 52b. The filter element 52b is designed to be passed through by the air flow 50b.

[0055] The filter element 52b is formed by a cuboid-shaped filter module. The filter element 52b is formed by a particulate filter. The filter element 52b is designed as a depth filter, in particular as a lamella filter. A main extension plane 54b of the filter element 52b extends at least substantially parallel to a main extension 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.

[0056] The blower device 14b further comprises a further filter element 52'b. The further filter element 52'b is intended to be flowed through by the air flow 50b. The further filter element 52'b is intended to be flowed through by the air flow 50b upstream of the filter element 52b. The further filter element 52'b is formed by a cuboid-shaped filter module. The further filter element 52'b is formed by an activated carbon odor filter. A main extension plane 54'b of the further filter element 52'b extends at least substantially parallel to a main extension 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 inlet side of the further filter element 52'b.The further filter element 52'b is arranged on an inlet side of the filter element 52b.

[0057] The fan 48b is arranged next to the filter element 52b, with the air flow 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 48. The filter element 52b, the further filter element 52'b, and the fan 48b are arranged together in the housing unit 58b. The housing unit 58b has an air guide channel 82b which accommodates the filter element 52b and the further filter element 52b' and is provided for guiding the air flow 50b between the filter element 52b and the fan 48b. The filter element 52b and the further filter element 52'b are arranged stacked. The filter element 52b is arranged fluidically along the air flow 50b upstream of the fan 48b. The further filter element 52'b is arranged fluidically along the air flow 50b in front of the filter element 52b.The air flow 50b between the fan 48b and the filter element 52b is deflected by at least approximately 90°. The air flow 50b is deflected in the air duct 82b. However, it would also be conceivable to dispense with an air duct 82b. A flow direction r 1 of the air flow 50b through the filter element 52b is essentially different from a flow direction r 2 of the air flow 50b through the fan 48b. A flow direction r 3 of the air flow 50b through the further filter element 52'b is essentially different from a flow direction r 2 of the air flow 50b through the fan 48b. The flow direction r 3 of the air flow 50b through the further filter element 52'b essentially corresponds to the flow direction r 1 of the air flow 50b through the filter element 52b. The flow direction r 2 of the air flow 50b through the fan 48b runs parallel to a main extension plane 56b of the fan 48b.The flow direction r 1 of the air flow 50b through the filter element 52b runs perpendicular to the main extension plane 54b of the filter element 52b. The flow direction r 3 of the air flow 50b through the further filter element 52'b runs perpendicular to the main extension plane 54'b of the further filter element 52'b. The flow direction r 1 of the filter element 52b and the flow direction r 3 of the further filter element 52'b are angled by at least approximately 90° relative to the flow direction r 2 of the fan 48b. Reference symbol

[0058] 10Respiratory protection system 12Mouthguard device 14Blower device 16Mask body 18User 20Breathing zone 22Breathing air supply line 22Breathing air supply line 24Breathing air duct 26Breathing air flow 28Fastening strap 30Head 32Connection unit 34Adjustment unit 36Side edge 38Separation layer 40Outlet area 42Drain valve 44Partial area 46Breathing air line 48Fan 50Air flow 52Filter element 52Filter element 54Main extension plane 54Main extension plane 56Main extension plane 58Housing unit 60Vest 62Control unit 64Control element 66Control and / or regulation unit 68Sensor unit 70Housing shell 72Housing shell 74Cover 76Cover 78Air inlet opening 80Air outlet opening 82Air duct 84Energy storage 86Control and / or regulation unit 88Cable 90Sealing element 92Coupling element 94Coupling element 96Actuating element 98Head fastening strap 100Fastening unit 100Fastening unit 102Cord 104Cord clamp 106Recess 108T-connector dThickness r 1Flow direction r 2 Flow direction r 3 Flow direction

Claims

1. Respiratory protection system, in particular blower respiratory protection system, with a blower device (14a; 14b) comprising a fan (48a; 48b) for a generation of an airflow (50a; 50b), at least one filter element (52a; 52b) that is configured to be flowed through by the airflow (50a; 50b) and a housing unit (58a; 58b) which accommodates the fan (48a; 48b) and the at least one filter element (52a; 52b), and with at least one mouth protection device (12a) and with a vest (60a) that is to be worn by a user (18a) and on the back of which the blower device (14a; 14b) is arranged, characterized in that the housing unit (58a; 58b) has a thickness (d) of less than 70 mm, wherein the fan (48a; 48b) is arranged at least partly beside the at least one filter element (52a; 52b), wherein the airflow (50a; 50b) is deflected between the fan (48a; 48b) and the filter element (52a; 52b), wherein a flow-through direction (r1) of the airflow (50a; 50b) through the filter element (52a; 52b) is substantially different from a flow-through direction (r2) of the airflow (50a; 50b) through the fan (48a; 48b), wherein the at least one filter element (52a; 52b) has a main extension plane (54a; 54b) and the fan (48a; 48b) has a main extension plane (56a; 56b), wherein at least a large portion of normal vectors of the main extension plane (54a; 54b) of the filter element (52a; 52b), which intersect with the filter element (52a; 52b), is free of an intersection point with the fan (48a; 48b).

2. Respiratory protection system, in particular blower respiratory protection system, according to claim 1, characterized in that the at least one filter element (52a) has a main extension plane (54a) and the fan (48a; 48b) has a main extension plane (56a), wherein a distance from the main extension plane (54a) of the filter element (52a) to the main extension plane (56a) of the fan (48a) is smaller than a maximum thickness of the filter element (52a).

3. Respiratory protection system, in particular blower respiratory protection system, according to one of the preceding claims, characterized by a further filter element (52'b), which is arranged beside the fan (48b) and / or beside the one filter element (52b) and whose flow-through direction (r3) of the airflow (50b) differs from a flow-through direction (r1, r2) of the airflow (50b) through the fan (48b) and / or through the filter element (52b).

4. Respiratory protection system, in particular blower respiratory protection system, according to one of the preceding claims, characterized in that the at least one filter element (52a; 52b) has a main extension plane (54a; 54b) and the fan (48a; 48b) has a main extension plane (56a; 56b), wherein the main extension plane (54a; 54b) of the filter element (52a; 52b) is angled relative to the main extension plane (56a; 56b) of the fan (48a; 48b).

5. Respiratory protection system, in particular blower respiratory protection system, according to one of the preceding claims, characterized in that the fan (48a; 48b) is configured for a generation of a volumetric flow rate of the airflow (50a; 50b) of at least 50 l / min and maximally 250 l / min.

6. Respiratory protection system, in particular blower respiratory protection system, according to claim 1, characterized in that the at least one blower device (14a; 14b) is configured for a generation of a positive pressure in the mouth protection device (12a).

7. Respiratory protection system, in particular blower respiratory protection system, according to claim 1, characterized by an external operating unit (62a) comprising at least one operating element (64a) and at least one control and / or regulation unit (66a), which is configured for a control and / or regulation of the blower device (14a; 14b).

8. Respiratory protection system, in particular blower respiratory protection system, according to claim 7, characterized in that the external operating unit (62a) comprises at least one sensor unit (68a) for capturing at least one environment parameter, wherein the control and / or regulation unit (66a) is configured, in at least one operation state, for a control and / or regulation of the blower device (14a; 14b) on the basis of the at least one environment parameter.

9. An external operating unit for a respiratory protection system (10a) according to one of the preceding claims.