EP3838349B1 - Respiratory protection system with a fan device - Google Patents

Description

State of the art

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

A blower device for a respiratory protection system, with a fan for generating an air flow and with at least one filter element which is intended to be flowed through by the air flow, has already been proposed.

In the printed publication WO 2011/006206 discloses a breathing apparatus having a mask and a neck component. The neck component is attached to the mask and encloses the neck of the user. The neck component includes a flow generator to take in unfiltered air from the environment, filter the unfiltered air, and supply the filtered air to the mask.

In the printed publication US 2018/021605 discloses a positive pressure air filter system which is particularly advantageous in the confined spaces of a mine with low ceiling heights. An air pump and air filter unit is attached to a vest worn by the user and is 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 which are shaped to fit against the user's face immediately above the user's nose and extend to the user's cheeks.

The object of the invention is in particular to provide a generic device with improved properties in terms of compactness and comfort. The 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

The invention is based on a blower device for a respiratory protection system, with a fan for generating an air flow and with at least one filter element which is intended to be flowed through by the air flow.

It is proposed that the fan is arranged at least partially next to the at least one filter element, wherein the air flow is diverted 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 diverted 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 in particular intended to be worn on the body, such as on the back and/or on the hip.

In this context, a "blower device" is to be understood in particular as a device that is intended for actively generating an air flow to supply a user with breathing air. The blower device is intended in particular to supply the air flow to a face mask device of the respiratory protection system during operation. 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 blower device is preferably intended in particular to suck in air from an environment, to clean the air, in particular to filter it, and to actively supply the cleaned air to a user, in particular via the face mask device. The blower device is preferably intended to generate an active air flow. The blower device is in particular intended to generate an overpressure air flow. The fan is in particular intended to actively generate an air flow during operation. The fan is in particular intended to actively suck in air from an 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 to be understood in particular as an element which, during operation, leads to a Filtering of the air flow is provided. 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 for separating particles, in particular suspended matter, from the air flow. Various filters that appear to be useful to a person skilled in the art are conceivable. Preferably, the filter of the filter element is formed in particular by a suspended matter filter. Preferably, the filter is designed as a depth filter or cake filter, in particular as a lamella filter.

In this context, the fact that "the fan is arranged at least partially next to the at least one filter element" is to 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 runs 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 next to one another in a main extension plane of the blower device. Preferably, the fan and the filter element, viewed perpendicular to the main extension plane of the blower device, are at least substantially free, in particular completely free, from mutual overlap. A "main extension plane" of a structural unit is to be understood in particular to mean a plane which is parallel to a largest side surface of a smallest imaginary cuboid, which just completely encloses the structural unit, and in particular runs through the center of the cuboid. In this context, "at least substantially" is to be understood to mean in particular that a deviation from a predetermined value deviates in particular by less than 25%, preferably less than 10% and particularly preferably less than 5% of the predetermined value.

In this context, the "air flow is diverted between the fan and the filter element" is to 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. In this context, the direction of the air flow is to be understood in particular to mean an average direction of movement of the particles of the air flow at a point. Preferably, there is a A guide channel is arranged between the filter element and the fan, which is intended to guide the air flow, wherein the guide channel is intended 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 be in the form of a curve, a bend, a kink or the like, for example. 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 to be understood in particular as specially programmed, designed and/or equipped. The fact that an object is intended for a specific function is to be understood in particular as meaning that the object fulfills and/or carries out this specific function in at least one application and/or operating state.

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

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. In particular, this makes it possible to divert the air flow. Preferably, this makes it possible 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 installation height of the blower device can be achieved.

Furthermore, it would be conceivable that the direction of flow of the air flow through the filter element is at least substantially opposite to the direction of flow of the air flow through the fan. In this context, "at least substantially opposite" is to be understood in particular to mean that a direction vector of the direction of flow 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 direction vector of the direction of flow 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. This makes it possible in particular to achieve an advantageously low overall height of the blower device.

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. A distance between the main extension plane of the filter element and the main extension plane of the fan is preferably less than 50 mm, preferably less than 30 mm and particularly preferably less than 10 mm. The main extension plane of the filter element and the main extension plane of the fan are preferably 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.

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 large part of the 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 free from an intersection point with the fan. The filter element and the fan can in particular be arranged parallel to one another next to one another or partially angled to one another next 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 large part of the normal vectors intersecting the filter element" is to be understood in particular as the normal vectors which intersect more than 50%, preferably more than 70% and particularly preferably more than 90% of a main extension surface of the filter element. In this way, in particular, an advantageously compact arrangement of the fan and the filter element can be achieved. In this way, in particular, an advantageously compact, in particular flat, blower device can be provided.

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 is different from a flow direction of the air flow through the fan and/or the filter element. The further filter element is preferably 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.

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 The normal vector of the main extension plane of the fan that intersects the fan forms an angle of a maximum of 90° and at least 5°. Preferably, a line of intersection of 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. A smallest distance between the line of intersection and the filter element is in particular less than 15 cm, preferably less than 10 cm and particularly preferably less than 5 cm. 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.

According to the invention, the blower device has a housing unit which accommodates the fan and the at least one filter element and which 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. The blower device preferably also has an energy storage device for supplying energy to the fan, which 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.

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

According to the invention, the invention is based on a respiratory protection system, in particular a blower respiratory protection system, with the blower device and with at least one mouth guard device. It is proposed that the at least one blower device is provided for generating an overpressure in the mouth guard device. Preferably, the at least one blower device is provided for generating a relative overpressure in relation to an environment in the mouth guard device. In this context, a "respiratory protection system" is to be understood in particular as a system with a blower device and a A mouth guard device is understood to mean a device that is intended to actively provide an air flow to a user's breathing air supply. The breathing protection system is particularly intended to generate an air flow by means of a blower device during operation, which is supplied to the mouth guard device of the breathing protection system. The blower device is preferably connected to the mouth guard device of the breathing protection system via at least one breathing air supply line. The breathing protection system is preferably intended to suck air from an environment by means of the blower device during operation, to clean the air, in particular to filter it, and to actively supply the cleaned air to a user by means of the mouth guard device. In this context, a "mouth guard device" is to be understood to mean in particular a device that forms a mouth guard and is intended to be worn at least in a user's mouth and/or nose area. The device is preferably intended to form a breathing area in front of the user's mouth and/or nose area, which is continuously supplied with breathing air during operation. The mouthguard device is preferably designed to supply a user directly with breathing 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 mouthguard device is preferably free from covering the eyes, in particular an eye area, of a user. The mouthguard device preferably has 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 which opens into the breathing area and is intended to guide an active breathing air flow. This makes it possible in particular to provide an advantageously comfortable breathing protection system. In particular, a reliable breathing air supply can be achieved.

According to the invention, the respiratory protection system has a vest for wearing 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 that the respiratory protection system can be worn in a particularly advantageously comfortable manner. Furthermore In particular, an advantageous arrangement of the blower device can be achieved. In particular, slipping of the blower device can be avoided.

It is further proposed that the respiratory protection system has an external operating unit which has at least one operating element and at least one control and/or regulating unit which is intended to control and/or regulate the blower device. The external operating unit is preferably connected to the blower device by means of a radio connection and/or by means of a cable. The external operating unit is in particular formed 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 which has at least one operating element which can be actuated directly by a user and which 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 to be understood in particular as an element that is intended to receive an input value 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 to be understood in particular as a unit with at least one control electronics unit. A "control electronics unit" is to be understood in particular as a unit with a processor unit and with a memory unit as well as with an operating program stored in the memory unit. This makes it possible to achieve advantageously convenient control of the blower device.

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 to be useful to a person skilled in the art are conceivable. Preferably, the sensor unit is used to measure, for example, air quality, ambient pressure, Oxygen concentration or the like is recorded. The external control unit is particularly designed to be worn by a user on the chest. The sensor unit can therefore be used to record environmental parameters in the user's head area. In this context, a "sensor unit" is to be understood in particular as a unit that is designed to record at least one parameter and/or a physical property, whereby the recording can take place actively, such as in particular by generating and transmitting an electrical measurement signal, and/or passively, such as in particular by recording changes in the properties of a sensor component. Various sensor units that appear useful to the person skilled in the art are conceivable. In particular, this makes it possible to achieve sensible control and/or regulation of the blower device. In particular, an adapted operation of the blower device can be achieved. It would also be conceivable that a user could be warned of dangerous situations, for example.

The blower device according to the invention, the respiratory protection system and/or the external operating unit should not be limited to the application and embodiment described above. In particular, the blower device according to the invention, the respiratory protection system and/or the external operating unit can have a number of individual elements, components and units that differs from the number stated herein in order to fulfill a function described herein. In addition, in the value ranges stated in this disclosure, values within the stated limits should also be considered disclosed and can be used as desired.

drawings

Further advantages emerge from the following description of the drawings. The drawings show two embodiments of the invention. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and combine them into further useful combinations.

Fig. 1

ein Atemschutzsystem mit einer Gebläsevorrichtung, mit einer Mundschutzvorrichtung, mit einer Weste und mit einer externen Bedieneinheit und einen Benutzer in einer schematischen Darstellung,

Fig. 2

die Gebläsevorrichtung des Atemschutzsystems in einer schematischen Draufsicht,

Fig. 3

die Gebläsevorrichtung des Atemschutzsystems, mit einem Lüfter und mit einem Filterelement in einer schematischen Schnittdarstellung entlang der Schnittlinie II-II,

Fig. 4

die Mundschutzvorrichtung des Atemschutzsystems und einen Kopf des Benutzers in einer schematischen Darstellung,

Fig. 5

die Mundschutzvorrichtung des Atemschutzsystems in einer schematischen Teilschnittdarstellung,

Fig. 6

einen Teilausschnitt der Mundschutzvorrichtung des Atemschutzsystems in einer schematischen Schnittdarstellung und

Fig. 7

eine alternative Gebläsevorrichtung eines Atemschutzsystems, mit einem Lüfter, mit einem Filterelement und mit einem weiteren Filterelement in einer schematischen Schnittdarstellung.

They show:

Fig. 1

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

the blower device of the respiratory protection system in a schematic plan view,

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 mouthguard device of the respiratory protection system and a head of the user in a schematic representation,

Fig. 5

the mouthguard device of the respiratory protection system in a schematic partial sectional view,

Fig. 6

a partial section of the mouthguard 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 another filter element in a schematic sectional view.

Description of the embodiments

The Figure 1 shows 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 intended to generate a breathing air flow 26a for the mouth guard device 12a.

The blower device 14a has a housing unit 58a. The housing unit 58a is formed by a plastic housing. The housing unit 58a has two housing shells 70a, 72a connected to one another, namely a first housing shell 70a and a second housing shell 72a. The first housing shell 70a has two openable covers 74a, 76a, via 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 faces the user 18a when worn. The second housing shell 72a is concavely curved on an outer side. The curvature of the second housing shell 72a is adapted to the curvature of a person's back. The housing unit 58a also has several 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 suck in ambient air by means of an air flow 50a. The housing unit 58a also 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 passed on from the air outlet opening 80a to the mouth guard device 12a during operation ( Figure 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.

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 mouth guard device 12a. The fan 48a is provided for generating an overpressure in the mouth guard 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. In operation, the blower device 14a is provided by means of the fan 48a for generating a relative overpressure compared to an environment in the mouth guard device 12a. The fan 48a is formed by an electric radial fan. In principle, however, another, known to a person skilled in the art as A design that appears sensible is 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 also has 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 automatic air flow control and air flow adjustment ( Figure 3 ).

Furthermore, the blower device 14a has the filter element 52a. The filter element 52a is intended to be flowed through by the air flow 50a. The filter element 52a is formed by a cuboid-shaped filter module. The filter element 52a is formed by a suspended matter 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 exchangeable via the cover 74a ( Figure 3 ).

The fan 48a is arranged next to the filter element 52a, whereby the air flow 50a is diverted 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 guide channel 82a which accommodates the filter element 52a and is intended to guide 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 is arranged 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 guide channel 82a. However, it would also be conceivable that an air guide channel 82a could be dispensed with. 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 that the flow direction r ₂ of the air flow 50a through the fan 48a runs 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 ).

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. Preferably, 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 be less than 50 mm, preferably less than 30 mm and particularly preferably less than 10 mm. In the embodiment shown, 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 enclose a smallest angle of at least 60°, preferably at least 70°, with an imaginary plane in which the line of intersection 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 of 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. A minimum distance between the intersection line 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 minimum distance between the intersection line and the filter element 52a is less than a minimum distance between the fan 48a and the filter element 52a. At least a large part 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 ).

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 exchangeable via the cover 76a ( Figure 3 ).

Furthermore, the respiratory protection system 10a has an external control unit 62a. The external control unit 62a is formed by a remote control. The control unit 62a has 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 to the blower device 14a by means of a cable 88a, for example. The control and/or regulating unit 66a of the external operating unit 62a is particularly provided to control the control and/or regulating unit 86a of the blower device 14a depending on an input to 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 operating unit 62a also has 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 operation for controlling the control and/or regulating unit 86a of the blower device 14a, wherein a power level of the fan 48a is adjusted by means of the control and/or regulating unit 86a of the blower device 14a based on the ambient parameters. The sensor unit 68a is provided to detect an air quality, an ambient pressure and/or an oxygen concentration.

Furthermore, the respiratory protection system 10a has a vest 60a for wearing by a user 18a. The vest 60a is made of 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 by a user 18a on the back during operation using the vest 60a. Furthermore, the external control unit 62a is intended to be worn by a user 18a on a chest. The external control unit 62a is arranged on a front of the vest 60a. Environmental parameters in a head region of the user 18a can therefore be detected in particular using the sensor unit 68a.

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 mouth protection device 12a. The breathing air line 46a is connected via the air outlet opening 80a the blower device 14a is connected to the blower device 14a. The breathing air line 46a is formed by a hose. The breathing air line 46a is provided in an operation for guiding the breathing air flow 26a.

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. The mask base body 16a, together with a face of the user 18a and a separating layer 38a, delimits the breathing area 20a during operation. The mask base body 16a consists at least for the most part 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 for the most part of a textile material. The mask base body 16a consists entirely of a textile material. The mask base body 16a is made of a textile. The mask base body 16a consists entirely of a textile. The mask base body 16a is designed to be at least substantially airtight. It would be conceivable in particular that a textile from which the mask base body 16a is made 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 preferably at least 3 bar ( Figure 4 ).

The mouth guard 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 on an upper edge of the mask base body 16a. The sealing element 90a is intended to seal the mask base body 16a, at least on 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 in the direction of 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 glued to the mask base body 16a, for example ( Figure 6 ).

Furthermore, the mouth guard 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 intended to guide 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 of the breathing air supply line 22a that appears sensible to 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.

Furthermore, the mouth guard device 12a has 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 opens into the breathing area 20a and is intended to guide 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 routed 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 a 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.

The breathing air line 46a connected to the blower device 14a is intended to guide the breathing air flow 26a to the breathing air supply lines 22a, 22'a. The breathing air line 46a is also intended to divide the breathing air flow 26a between the breathing air supply line 22a and the further breathing air supply line 22'a. The breathing air line 46a is connected to the breathing air supply line 22a and the further breathing air supply line 22'a via a T-connector 108a. The T-connector 108a is intended for placement in a neck region of the user 18a.

The mouth guard 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 formed from an elastic band, such as in particular a rubber band. The fastening strap 28a has a width which corresponds at least approximately to a 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. When the face mask device 12a is worn, the fastening strap 28a is designed to be guided around the back of the head, in particular in the neck area. The face mask device 12a has at least one connection unit 32a for a simultaneous plug connection of 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 connection unit 32a and a further connection unit (not visible) for a simultaneous plug connection of the fastening strap 28a to the breathing air supply line 22a and the further breathing air supply unit 22'a to the mask base body 16a. The connection units 32a serve to pull or remove the face mask device 12a. The connection units 32a are coupled, for example, by means of a plug-in movement. The connection 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 connection units 32a each form an interface receptacle, for example, while the second coupling elements 94a of the connection units 32a each form an interface extension. The first coupling elements 92a of the connection units 32a are each opposite ends firmly connected to the mask base body 16a. The second coupling element 94a of the connection unit 32a is firmly connected to a first end of the fastening band 28a and the breathing air supply line 22a. The further second coupling element of the further connection unit is firmly connected to a second end of the fastening band 28a and the further breathing air supply line 22'a. The first coupling elements 92a of the connection units 32a are each formed by a hose connection. The first coupling elements 92a of the connection units 32a are each provided to latch with the second coupling elements 94a of the connection units 32a. The second coupling elements 94a of the connection units 32a each have actuating elements 96a for releasing the latching connection ( Figure 1 , 5 ).

The mouth guard device 12a has a head fastening strap 98a for additional fixation 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 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 mouth guard 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 adjustably through recesses for fastening on the fastening units 100a, 100'a.

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 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, of the mask base body 16a. 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 fastened to the first end and the second end. By means of the cord clamp 104a, an effective length of the cord 102a and thus also of the side edge 36a of the mask base body 16a is manually adjustable. In particular, by forming loops of different sizes of the cord 102a by means of the cord clamp 104a, an effective length of the cord 102a can be manually adjusted.

Furthermore, the mouth guard 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 under 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 which extends to a central area of the mouth guard 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 mouth and/or nose area of a user. In the mouth and/or nose area of the user, the breathing area 20a merges into the outlet area 40a. The separating layer 38a is formed in one piece 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 area, which connects the breathing area 20a to the outlet area 40a. The separating layer 38a consists at least essentially of a textile material. The separating layer 38a consists made 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. The separating layer 38a has the recess 106a in the middle area, which connects the breathing area 20a with the outlet area 40a. The breathing air flow 26a flows during operation 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 a close area of the mouth and/or nose area of a user 18a ( Figure 6 ).

In addition, the mouth guard device 12a has a drain valve 42a, which is intended to regulate a pressure in the breathing area 20a to an at least approximately constant value. The drain 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 from a defined overpressure in the breathing area 20a or the outlet area 40a. The drain valve 42a is intended to allow, in particular to maintain, a defined overpressure in the breathing area 20a. The drain valve 42a is preferably formed by a mechanical valve. The mask base body 16a is not completely sealed against a face of the user 18a, so that in addition to the drain valve 42a, air can also escape at a transition from the mask base body 16a to the face. If the leak is too great or if the mouth guard 12a is removed at the transition from the mask base 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 means of the blower device 14a, in particular by means of a 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 informed that the mouth guard 12a is being worn incorrectly. Furthermore, the fan 48a can stop automatically when the mouth guard 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 ).

Furthermore, it is also conceivable that the mask base body 16a has a partial area 44a which is designed to be air-permeable. The partial area 44a is made in particular of an air-permeable textile. The partial area 44a is directly adjacent to the outlet area 40a. The partial area 44a serves for a defined discharge of air in the outlet area 40a. The partial area 44a is provided in addition to the discharge valve 42a, but it would also be conceivable that only the partial area 44a is provided and the partial area 44a takes over the function of the discharge valve 42a.

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 6 To 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 identically designated components, in particular with regard to components with the same reference numerals, reference can also be made to the drawings and/or the description of the embodiment of the Figures 1 to 6 be referred to.

Figure 7 shows a blower device 14b of a respiratory protection system. The blower device 14b is intended to generate a breathing air flow 26b. The blower device 14b is intended to generate a breathing air flow 26b for a mouth protection device.

The blower device 14b has a housing unit 58b. The housing unit 58b is formed by a plastic housing. The housing unit 58b has two housing shells 70b, 72b connected to one another, 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.

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 mouth guard device 12b. The fan 48b is provided for generating an overpressure in the mouth guard device 12b. The fan 48b is formed by an electric radial fan.

Furthermore, the blower device 14b has a filter element 52b. The filter element 52b is intended to be flowed through by the air flow 50b.

The filter element 52b is formed by a cuboid-shaped filter module. The filter element 52b is formed by a suspended matter 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.

The blower device 14b also has 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 in front 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.

The fan 48b is arranged next to the filter element 52b, with the air flow 50b being diverted 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 intended to guide 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 in front 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 angled by at least approximately 90° diverted. The air flow 50b is diverted in the air duct 82b. However, it would also be conceivable that an air duct 82b could be dispensed with. 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 corresponds essentially 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 sign

10

respiratory protection system

12

face mask

14

blower device

16

mask body

18

user

20

breathing area

22

breathing air supply line

22'

breathing air supply line

24

breathing air channel

26

breathing air flow

28

fastening tape

30

Head

32

connection unit

34

setting unit

36

side edge

38

separating layer

40

outlet area

42

drain valve

44

sub-area

46

breathing air line

48

fan

50

airflow

52

filter element

52'

filter element

54

main extension plane

54'

main extension plane

56

main extension plane

58

housing unit

60

vest

62

control unit

64

control element

66

control and/or regulating unit

68

sensor unit

70

housing shell

72

housing shell

74

cover

76

cover

78

air intake opening

80

air outlet opening

82

air duct

84

energy storage

86

control and/or regulating unit

88

Cable

90

sealing element

92

coupling element

94

coupling element

96

actuator

98

head strap

100

mounting unit

100'

mounting unit

102

cord

104

cord clamp

106

recess

108

T-connector

d

thickness

r1

flow direction

r2

flow direction

r3

flow direction

Claims (9)

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.

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