ventilation device

Abstract

Ventilation device (1) for ventilating and extracting air from rooms (5) of a building, comprising an airflow duct (2) for connecting the interior (4) of the room (5), separated from a building wall (3), to an exterior (6) of the building, comprising a first fan (7) arranged in the airflow duct (2) as a radial fan, with an airflow area (8) for an exhaust air media flow (9) or supply air media flow (10), and a second fan (11) as a radial fan in the airflow duct (2) with an airflow area (12) for an exhaust air media flow (9) or supply air media flow (10), wherein the fans (7,11) in an operating state simultaneously with opposite air conveyance directions for conveying the supply air media flow (10) from the outside (6) to the inside (4) of the room (5) and for conveying the exhaust air media flow (9) from the inside (4) of the room (5) to the outside (6) for continuous exchange, or in an operating state together in one air conveyance direction for conveying the exhaust air media flow (9) or for conveying the supply air media flow (10), wherein the airflow duct (2) has an outer baffle (14) at a first free end (13) towards the outside (6) and an inner baffle (16) at a second free end (15) towards the inside (4), characterized in that the airflow duct (2) is circular while maintaining a uniform cross-section (17), and that the outer baffle (14) has a first duct section (18) to which a second duct section (19) is added. connects,wherein the cross-section (20) of the first channel section (18) is adapted to the cross-section (17) of the airflow channel (2) and is operatively connected with its free end (21) to the first free end (13) of the airflow channel (2), wherein the second channel section (19) forms a reduced cross-section (22) compared to the first channel section (18) and the airflow channel (2), to which a weather protection (23) is attached on the visible outer surface (6), the weather protection (23) being adapted to the size of the cross-section (22).

Description

[0001] The invention relates to a ventilation device for supplying and extracting air from at least one room of a building according to the preamble of claim 1. The invention relates to an airflow duct for connecting the interior of a room, separated by a building wall, to the exterior of the building. The airflow duct comprises a first fan, a radial fan with an inlet area for an exhaust air flow or a supply air flow, and a second fan, also a radial fan with an inlet area for an exhaust air flow or a supply air flow, located within the airflow duct. The fans can be operated simultaneously with opposite airflow directions to convey the supply air flow from the exterior to the interior of the room and the exhaust air flow from the interior of the room to the exterior of the building, thus ensuring continuous air exchange.Furthermore, the fans can be operated simultaneously in one direction to move either the exhaust air flow or the supply air flow. Additionally, the ventilation device has an external grille with weather protection at the first free end and an internal grille at the second free end.

[0002] Finally, the ventilation system in the air duct comprises the radial fans, which are positioned with one of their large surfaces facing each other along an axis of symmetry within the airflow duct. Each radial fan is housed in a fan mount that fully accommodates it, and these mounts are equipped with separating plates, dividers, and filters. Together, these components separate the exhaust air flow from the supply air flow along the axis of symmetry, directing the air into two independent channels. The clear separation of the airflows along the length of the airflow duct is thus achieved through the arrangement of the ventilation system's functional components.

[0003] Ventilation devices of this type are already known from EP 3168544 B1. The invention relates to a ventilation device for supplying and extracting air from a room. Such a ventilation device comprises an air duct for connecting an interior of the room with an exterior, i.e., an external environment outside the building in which the room is located. An axial fan is arranged in the air duct, which can be operated in at least two operating states with opposite airflow directions for supplying air from the exterior to the interior of the room and for extracting air from the interior of the room to the exterior. Finally, the ventilation device also comprises an axial fan located in the air duct, which can be operated in at least two operating states with opposite airflow directions.One operating mode serves to supply fresh air from the outside to the inside of the room, while in the other operating mode, exhaust air is drawn from the inside of the room to the outside. This cyclically operating ventilation system results in disadvantages regarding the efficiency of the air exchange volume flow. Furthermore, the cross-section of the air duct remains constant up to its respective free ends on both the outside and inside of the room. This necessitates an external baffle, which is adapted to the cross-section of the air duct and extends beyond its cross-section. This is disadvantageous due to its size, both visually and in terms of manufacturing costs, requiring more material and larger tooling.

[0004] German patent DE 202014003368 U1 describes a ventilation unit for indoor ventilation in buildings, which has two separate air ducts, each containing a fan. The axis of rotation of the fans is inclined to the longitudinal orientation of the ducts. The design of two fans within a single air duct is complex and therefore costly. Furthermore, the size of the two fans and their arrangement within the air duct are dependent on the size of the duct itself. A compact ventilation unit is desirable, thus requiring less effort to create a wall penetration. However, a smaller cross-section of the air duct, and consequently of the ventilation unit, restricts the airflow.Furthermore, the construction of the outer and inner surfaces of the attached housing panels is costly due to the large number of individual parts, and the need for mounting positions for additional functional components makes manufacturing complex. The housing panels are excessively large in cross-section and depth, which is a disadvantage in terms of appearance.

[0005] Furthermore, EP0517701 B1 describes a fan through which two gaseous media flow in opposite directions. The fan is of radial design and positioned at one of the end sections. This end section has an outlet for a first flowing medium and an inlet for a second flowing medium, which are adjacent and coaxially arranged. The fan comprises a double rotor consisting of two rotor sections separated by a partition. Each rotor section drives one of the two flowing media separately. The axis of rotation of the rotor sections is essentially longitudinal. The fan arrangement requires considerable space within the duct. Consequently, the circular cross-section of the air duct is also large.Cover plates are provided at both ends of the fan. At one end, these plates are adapted to the cross-sectional area of ​​the air duct, while at the other end they extend beyond the cross-sectional area. Due to the large cross-sectional area of ​​the air duct and the cover plates at each end, the fan's appearance is considered detrimental. The visible components overshadow its functionality, drawing the eye primarily to the fan itself. However, the fan's advantageous design, being mounted within a wall, makes its function virtually invisible for the ventilation of a building.

[0006] The invention is based on the objective of creating a ventilation device of the type mentioned above that overcomes the disadvantages of the prior art. At the same time, the ventilation device should achieve an attractive appearance despite its compact design and deliver high airflow with low noise levels. Furthermore, with an advantageous design, the ventilation device should also be able to drain any condensation that may occur and be easy to install.

[0007] While ventilation devices of the known prior art exhibit a preferred airflow operation, the ventilation device according to the invention can be switched between three different types of air operation: exhaust air operation, supply air operation, and simultaneous exhaust air and supply air operation. A disadvantage of the known ventilation devices mounted in a building wall is the large structure at the visible ends of the ventilation device for air exchange in exhaust air and / or supply air operation on an exterior wall or an interior wall of a building.

[0008] The invention describes a ventilation device for supplying and / or extracting air from living and recreational spaces, offices, schools, storage rooms, and workrooms, consisting of an airflow duct connecting an exterior surface separated by the building wall to an interior surface of a corresponding room within the building. A first fan is positioned in the airflow duct as a radial fan with an inlet area for an exhaust air or supply air flow. A second fan is also positioned in the airflow duct as a radial fan with an inlet area for an exhaust air or supply air flow.Both fans are operated simultaneously in one operating state with opposite airflow directions to convey the supply air stream from the outside of the building to the inside of the room and to convey the exhaust air stream from the inside of the room to the outside of the building for continuous exchange, or they can be operated together in one operating state in one airflow direction to convey either the exhaust air stream or the supply air stream. Preferably, the airflow duct has an external baffle at a first free end on the outside of the building wall. A second free end, located on the inside of the building on the interior wall, is provided with an internal baffle. Both baffles are intended to improve the appearance, guide the airflow, and provide protection against foreign matter, such as dirt particles or moisture.

[0009] In a preferred embodiment, the airflow duct is circular while maintaining a uniform cross-section. The outer panel has a first duct section extending longitudinally to the airflow duct or along the axis of symmetry, to which a second duct section is attached. The circular cross-section of the first duct section is adapted to the cross-section of the airflow duct and its free end is operatively connected to the first free end of the airflow duct by means of a sliding mechanism, whereby the first duct section fits seamlessly into the airflow duct. According to the invention, the cross-section of the second duct section is visibly reduced compared to that of the first duct section and the airflow duct.Advantageously, a weather protection element is adapted to the reduced cross-section of the duct section and forms the visible end of the ventilation system on the building's exterior wall. This element has a noticeably smaller cross-section compared to the ventilation system itself, which is comprised of the functional components arranged within the airflow duct. The compact design of the weather protection element thus enhances the overall appearance of the building's exterior wall with simple means. Even when the ventilation system is installed within the building wall, the building's overall appearance remains unchanged due to the small cross-section of the weather protection element visible on the exterior.For installation and maintenance of the ventilation device, it is advantageous that the ventilation device, with its insert module, and the weather protection form a single unit. This allows the weather protection to be easily installed from inside the building by inserting the insert module, which contains all the functional elements of the ventilation device, and / or cleaned from inside the building by removing it. Experience has shown that cleaning is advisable when using insect screens. Because the insert module with its functional elements can be removed from inside the building, the ventilation device according to the invention can also be easily installed and maintained in buildings with multiple floors, without the need for a ladder or scaffolding.

[0010] Advantageously, the outer grille consists of the weather protection and a weather protection support. The weather protection and the weather protection support together form the first and second duct sections. The weather protection has a pipe-like first duct section and, attached to this first duct section in a stepped manner, a second tubular duct section. At the free end of this second tubular duct section, covering the first air opening, a structured protective element, in particular a grille, a perforated sheet, a grille element, or a louvered or blind element, is arranged.

[0011] The weather protection support is shaped to match the weather protection element, with a first, stepped, tube-like channel section followed by a further, pipe-like channel section. Simple to manufacture and assemble, the weather protection element and the weather protection support are positively connected by sliding them together, forming an integral unit. This could be achieved, for example, using screw connections, plug connections, clip connections, snap connections, or similar methods. A snap connection could also be designed such that the weather protection element is simply pushed onto the weather protection support, so that the two components are then permanently joined to form the outer cover.

[0012] Likewise, embodiments are also conceivable in which the weather protection and the weather protection support are inseparably connected.

[0013] The outer panel is advantageously arranged directly on the outside of the building wall and connected to the airflow duct in a form-fit and / or force-fit manner, following the example of the connection between the weather protection and the weather protection support.

[0014] The ventilation device according to the invention is specifically designed to drain away any type of weather-related moisture ingress, such as that which can occur during driving rain, snowdrifts, or groundwater flow. Independently of the weather-protection-equipped protective element for the supply air flow and / or exhaust air flow, a condensate drain is provided at the edge of the first channel section of the weather protection carrier, which connects to or extends beyond the outer surface of the building wall via a drain channel.Preferably, the air guidance system with the weather protection arranged at one end towards the outside of the building wall and the associated, covering protective element, while maintaining an opening, is separated from the condensate drain by the arrangement of the components on the weather protection support independently of each other and also dimensionally spaced apart from each other, so that an individual design of the protective element and the condensate drain is possible.

[0015] The condensate drain is therefore advantageously arranged directly on the weather protection support, for example in the lower part of the channel section. The invention is not limited to specific embodiments for the condensate drain. For example, but not exclusively, the device for draining condensate can be designed as a drain pipe, beak-like and / or with a drain nose and / or have a drip edge. A pipe-like or beak-like design of the condensate drain, or a design in the form of a drip nose, has the particular advantage that the condensate that forms can be drained in such a way that it is first carried out of the facade connection element via the opening of the pipe, the beak, or the nose, and away from the building wall, the facade, or the like, and drips off at a drip edge located away from the building wall.Such a drainage element advantageously extends across the outside of the building wall, from the inside of the airflow duct towards the outer panel and finally out to the outside. Effective condensate drainage is fully maintained even with a flush-mounted drain channel.

[0016] To adapt the length of the ventilation device to the specific characteristics of the building's wall, for example, to compensate for variations in building thickness or construction tolerances, an advantageous embodiment of the airflow duct consists of an inner and an outer pipe, which also form the housing and are arranged to be slidable relative to each other. It is advantageous that the inner and outer pipes are arranged to be slidable within one another, particularly telescopically. Furthermore, it is provided that the outer pipe overlaps the inner pipe, at least partially. Specifically, it is provided that the inner pipe is inserted into the outer pipe from the outside. For functional purposes, the inner and outer pipes remain in contact with each other over a dimensionally defined overlap area.All other functional components of the ventilation device, including the outer grille according to the invention, are arranged in the inner tube or, like the outer grille, are in direct contact with each other by sliding them into one another.

[0017] The ventilation system consists of functional elements that enable high efficiency. By arranging these elements within the building wall, the airflow duct is simple and compact, and not visible from the outside of the building. The functional elements comprise the first and second fans, the outer and inner grilles, the partition plates, dividers and fan mounts, as well as an exhaust air filter and a supply air filter.

[0018] Operating independently via the separating elements in the airflow duct, the fans convey an airflow or air media flow. Due to the continuous operation of the fans, the airflow rate remains constant. Both the first fan, operating within the air duct for an exhaust air flow, and the fan for a supply air flow, operate in opposite directions, ensuring a simultaneous and continuous exchange of airflow. The air duct is divided into two air guides, spatially separating the supply air flow from the exhaust air flow. Preferably, both the first and second fans are radial fans, with their inlet area and openings for the exhaust and supply air flows dividing them into two air guides.

[0019] Preferably, the fans each share half of the cross-sectional area of ​​the airflow duct. The first fan arranged in the airflow duct draws in the exhaust air stream and, advantageously, is positioned with its axis of rotation offset by 90° from its housing shell to the airflow surface on the axis of symmetry of the airflow duct, the circumference of the fan following the axis of symmetry. The second fan is positioned opposite the first fan, separated from the housing shell on the axis of symmetry of the airflow duct by a partition plate, in a mirror image configuration. This second fan draws in the supply air stream through half of the rotor's cross-sectional area and, advantageously, is positioned with its axis of rotation offset by 90° from its housing shell to the airflow surface on the axis of symmetry of the airflow duct, the circumference of the fan following the axis of symmetry.

[0020] The arrangement of the separating elements across the horizontal plane and the horizontal surface of the airflow duct allows for additional spatial separation of the air streams between the fans. By guiding the airflow from the exhaust and supply air and dividing the cross-sectional area of ​​the airflow duct for these streams, a uniformly controlled efficiency is achieved.

[0021] A further advantage is that the separating elements, consisting of partition plates and dividers, form two separate flow channels within the airflow duct adjacent to the outer and inner sides of the first and second fans. One of these channels forms the exhaust air duct and the other the supply air duct, or, depending on requirements, both channels can be used to supply air from the outside to the inside of the room by switching the fans. To enable all flow variants to be implemented with a single ventilation unit, the arrangement of the interior inlets with an inner baffle and the exterior outlets with an outer baffle provides all the necessary conditions for additional spatial separation of the airflows within the ventilation unit. This prevents the mixing of the two airflows. The direct arrangement of the components allows for a compact design of the ventilation unit.The ventilation device is suitable for building walls with thin walls as well as those with thick walls. Furthermore, the ventilation device gains stability along the entire length of the partition element in the basic structure of the airflow duct.

[0022] The ventilation device proves to be cost-effective and easy to install due to the cylindrical cross-section of the airflow duct. The cylindrical design allows for a simple and inexpensive opening in the building wall for the airflow duct using a core drill.

[0023] To increase efficiency and achieve full utilization, in a preferred embodiment of the ventilation device, the first and second fans are designed as centrifugal fans. The first fan conveys the exhaust air stream from the inside to the outside through the exhaust duct, while the second fan conveys the supply air stream from the outside to the inside through the supply air duct. Both air streams continuously flow through the air duct. Alternatively, the centrifugal fans can be operated together in one direction, conveying either the exhaust air stream or the supply air stream. These centrifugal fans are ideally suited for connecting the ventilation device to controlled residential ventilation. The supply and exhaust air streams require a certain distance to travel from the outside to the inside and vice versa, which can vary depending on the thickness of the building wall.In addition, the system must convert a cool supply air stream into a warm supply air stream before it is directed into the room. Such processes are easily and reliably accomplished using centrifugal fans. The centrifugal fans of the ventilation system, which operate continuously in rotation, achieve a suitable nominal volume flow, high pressure stability, and a constant volume flow. Continuous operation also results in low operating costs and protects the air handling unit, ensuring low wear and virtually silent operation. Furthermore, equipping the ventilation system with two centrifugal fans for either the supply or exhaust air stream offers the advantage of lower operating speeds for the same volume flow rate with a single centrifugal fan.

[0024] Due to the separate arrangement of the fans, each fan can be sized to fit the available space within the ventilation system. To ensure a compact and cost-effective cross-section for simplified installation in the building wall while maintaining optimal fan performance, the first and second fans within the airflow duct are sized to match the duct's cross-section and each is fully integrated into a fan mount. Furthermore, the axes of rotation of both the first and second fans are oriented at right angles to the airflow duct's axis of symmetry.

[0025] Due to the cylindrical cross-section of the airflow duct, it is recommended that the fan housing be almost entirely circular. When designed as radial fans, the housing is mostly circular. Positioning the opening on the housing creates a spiral-shaped casing. Similarly, the fan's inlet surfaces are advantageously also ring-shaped.

[0026] Furthermore, all other functional components can be arranged within the airflow duct. Thus, the airflow duct divides into second air guides along its entire length, each with separate inlets and outlets, for an air guide for the supply air flow and another for the exhaust air flow, with the respective covers at the first and second ends also creating a division.

[0027] Positioning the fans preferably within a fan housing simplifies the design by using fewer components, reduces the size of the separate parts, and facilitates maintenance. This eliminates the need for complicated fan adjustments and reduces the number of parts, thereby lowering space requirements, costs, and assembly effort. Furthermore, the noise generated during operation can be reduced by encasing the fan housings.

[0028] Advantageously, the ventilation device has an exhaust air and a supply air filter element, which are arranged in the flow path of the air conveyed by the fan. This allows particles contained in the intake air, especially dust or other contaminants, to be retained before they enter downstream components, thereby increasing operational reliability and extending the service life of the ventilation device.

[0029] Further advantageous designs can be seen in the drawings. They show: Fig. 1 a sectional view of a side view of the ventilation device through the area of ​​an airflow duct with the functional components contained therein and a building wall of a building with an inside of a room and an outside in a first operating state in counterflow operation, Fig. 2 a perspective view of the ventilation device showing the front view, top view and side view Fig. 1 with outer and inner panels at the respective ends, Fig. 3 a sectional view of a side view of the ventilation device through the area of ​​an airflow duct with the functional components contained therein and a building wall of a building with an inside of a room and an outside in a second version of the operating state in exhaust air mode, Fig. 4 a perspective view of the ventilation device showing the front view, top view and side view Fig. 3 with outer and inner panels at the respective ends and with a view of a partition plate and Fig. 5 a sectional view of a side view of the ventilation device through the area of ​​an airflow duct with the functional components contained therein and a building wall of a building with an inside of a room and an outside in a third operating state in supply air mode.

[0030] Fig. Figure 1 of the drawing shows a cutaway view of the ventilation device 1 with an airflow duct 2 for simultaneously ventilating and extracting air from rooms 5 of a building. The ventilation device 1 is also shown according to... Fig. 3 only for bleeding and after Fig. 5 is only suitable for ventilating rooms 5. The ventilation device 1 can be adjusted according to Fig. 1 preferably from the inside of the room 4 or, if necessary, from the outside 6 in a building wall 3 after Fig. 1, Fig. 3 or Fig. 5 attach, wherein the building wall 3 forms an interior plaster 33 on the inside 4 and an exterior plaster 34 on the outside.

[0031] The building wall 3 shows that Fig. 1, Fig. 3 or Fig. 5. An opening, preferably cylindrical, is made from the inside 4 of room 5 to the outside 6. The ventilation device 1, in particular an airflow duct 2, is inserted into the opening. The ventilation device 1 can also be used in a specially designed opening in the building wall 3.

[0032] After the Fig. The ventilation device 1 consists of the airflow duct 2, which serves to connect an exterior 6, separated by the building wall 3, and the interior 4 of the corresponding room 5. A first fan 7 is located in the airflow duct 2. Fig. 1 Fig. 3 or Fig. 5 is arranged as a radial fan with an inlet area 8 for an exhaust air media flow 9 or supply air media flow 10. Furthermore, in the airflow duct 2, Fig. 1 Fig. 3 or Fig. 5 A second fan 11, a radial fan with an inlet area 12, is positioned for an exhaust air media flow 9 or a supply air media flow 10. Both fans 7, 11 are in an operating state according to Fig. 1, Fig. 3 and Fig. 5 simultaneously with opposite air conveyance directions to convey the supply air media flow 10 from the outside 6 to the inside 4 of room 5 and to convey the exhaust air media flow 9 from the inside 4 of room 5 to the outside 6 for a continuous exchange, or are in an operating state together in one air conveyance direction to convey the exhaust air media flow 9 to Fig. 3 or to promote the supply air media flow 10 after Fig. 5 operable. From the housing of the radial fans 7, 11, the exhaust air or supply air media flow 9, 10 emerges parallel to the axis of symmetry 35 of the airflow duct 2 and conveys the exhaust air or supply air media flow 9, 10 in a targeted manner towards the inside 4 of the room 5 or the outside 6 of the building. According to the invention, the airflow duct 2 has Fig. 1 to Fig. 5 at a first free end 13 on the outside 6 of the building wall 3, an external baffle 14 is located. On the inside 4 of the building's interior wall 3 in room 5 of the building, an internal baffle 16 is arranged at a second free end 15 of the airflow duct 2. According to the Fig. 2 and Fig. 4, the airflow channel 2 is circular while maintaining a constant cross-section 17. The outer baffle 14 has a circular shape. Fig. 1, Fig. 3 and Fig. 5 a first channel section 18, to which a second channel section 19 is attached. A circular cross-section 20 according to Fig. 2 and Fig. Section 4 of the first channel section 18 is adapted to the cross-section 17 of the airflow channel 2 and its free end 21 is operatively connected to the first free end 13 of the airflow channel 2 by means of a sliding connection. The first channel section 18 thus fits into the airflow channel 2 and forms a single-piece assembly.

[0033] According to the invention, the decrease is visibly reduced after the Fig. 1 to 5 The second channel section 19, compared to the first channel section 18 and the airflow channel 2, has a cross-section 22 that is almost half the cross-section 20 of the airflow channel 2, which extends over its entire length. A weather protection 23 adapts to the Fig. 1, Fig. 3 and Fig. 5 connects to the cross-section 22 of the duct section 19 and forms the visible end of the ventilation device 1 on the outside 6, with a visually smaller cross-section 22 compared to the overall structure of the ventilation device 1. The inside 4 of room 5 of the building remains visually unaffected by the actual dimensions of the ventilation device 1. The functionality and performance of the ventilation device 1 are determined by the concealed, non-visible volume of the largest portion of the ventilation device 1 within the building wall 3 and remain constant even with a reduced field of view of the outer panel 14.

[0034] The weather protection 23 is according to the Fig. According to the invention, the components 1 to 5 are connected to a slide-in module of the ventilation device 1. The ventilation device 1 is installed from the inside 4 of room 5 of the building by sliding the slide-in module, which includes all functional elements of the ventilation device 1, including the weather protection 23, into an outer pipe 29 of the ventilation device 1 pre-cut into a circular opening in the building wall 3. For maintenance or cleaning purposes, the slide-in module of the ventilation device 1 can also be removed from the inside 4 of room 5 in reverse order by sliding the slide-in module with the weather protection 23 out of the outer pipe 29 between an inner pipe 28.

[0035] With the Fig. As indicated by numbers 1 to 5, the outer panel 14 consists of the weather protection 23 and a weather protection support 24. According to the... Fig. 1, Fig. 3 and Fig. 5 together the first channel section 18, 18' and the second channel section 19, 19'. The weather protection 23 has a pipe-forming first channel section 18. With a step, a second pipe as channel section 19 follows the first channel section 18 in a fixed connection. The channel section 19 has a structured covering protective element at its free end 13 of the first air opening, which is referred to as the outer cover 14 and is a perforated sheet, a grid element or a louver or blind element.

[0036] The weather protection carrier 24 according to Fig. 1, Fig. 3 and Fig. 5, is shaped to match the weather protection 23. The weather protection support 24 also has a first channel section 18' shaped like a tube, to which a second tube, channel section 19', is connected in a stepped manner. The weather protection 23 and the weather protection support 24 are positively connected by sliding them together and form an integral unit. Screws, plug connections, clip connections, or snap-fit ​​connections could be used as connecting elements (not shown). Once the weather protection 23 is attached to the weather protection support 24, the two components are connected to form the outer cover 14.

[0037] Next, after the Fig. 1 to 5 the outer panel 14 is arranged on the outside 6 of the building wall 3, and is connected to the airflow channel 2 in a form-fit and / or force-fit manner according to the model of the connection between the weather protection 23 and the weather protection support 24.

[0038] Separated from the weather protection 23 and thus from the flow path of the supply air media stream and / or exhaust air media stream, according to the Fig. 1, Fig. 3 and Fig. 5 at the edge 25 of the first channel section 18' of the weather protection support 24, a condensate drain 26 is provided. The condensate drain 26 abuts the outer surface 6 of the building wall 3 with a drain channel 27 or is located at a distance from the outer surface 6 of the building wall 3 in a free operating area. Due to the separate arrangement of the functional components of the weather protection 23 with its opening for the exhaust and supply air media flow 9, 10 and the weather protection support 24 with the water drain pipe 36 attached to it for any condensate that may occur, the structure of the weather protection 23 and the condensate drain 26 can be individually designed without additional costs due to possible adjustments of the components.

[0039] The condensate drain 26 is mounted on the weather protection support 24 in the lower part of the channel section 18' and in the building wall 3, at the smallest possible distance from the floor of room 5 of the building. The separate arrangement of the weather protection 23 and the weather protection support 24 allows for further embodiments without restriction. For the drainage of condensate, according to the Fig. 1, Fig. 3 and Fig. 5 A water drain pipe 36 is provided. A beak-like drain nose or a drip edge are also possible for draining condensate, but these are not shown further. By means of a design as a water drain pipe 36, a beak-like design of the condensate drain 26, or a design in the form of a drain nose, the condensate that forms can be drained away in such a way that it is first carried out of the drain channel 27 via the opening of the pipe, the beak, or the nose, and away from the building wall 3, the facade, or the like, and drips off at a drip edge located some distance from the building wall 3. The drain channel 27 extends along the outer surface 6 of the building wall 3 from the inside out of the airflow channel 2 towards the outer panel 14 and finally out to the outer surface 6. An effective condensate drainage function is fully maintained even with a flush-mounted drain channel 27.

[0040] The length of the ventilation device 1 can be adjusted to the thickness of the building wall 3. The building thickness and construction tolerances are determined according to the Fig. The requirements of sections 1 to 5 are met by the fact that the airflow channel 2 consists of an inner tube 28 and an outer tube 29. The inner tube 28 and outer tube 29, which form the housing, are arranged to be slidable relative to each other and have an almost equal length. In the assembled state, the inner tube 28 is inserted into the outer tube 29, whereby the inner tube 28 is adjustable to the dimensions of the building wall 3 by being telescopically slid out of the outer tube 29. An overlap of the outer tube 29 with the inner tube 29 remains in some areas. All functional components of the ventilation device 1, including the external grille 14 according to the invention, are arranged in the inner tube 28.

[0041] All functional elements of the ventilation device 1 are according to the Fig. 1, Fig. 3 and Fig. 5 invisibly installed in the airflow duct 2 mounted in the building wall 3. Due to the two-part design of the airflow duct 2, consisting of the inner pipe 28 and the outer pipe 29, all functional elements can be positioned in the inner pipe 28 before the inner pipe 28 is inserted into the outer pipe 29. The functional elements of the ventilation device 1 consist of the following: Fig. 1 to 5 from the first and second fan 7, 11, the outer and inner cover 14, 16, from partition plates 30, 30', partition bars 42, 42' and fan mounts 31, 31', as well as from an exhaust and supply air filter 32, 32'.

[0042] The partition plates 30, 30' and partitions 42, 42' divide the airflow channel 2 according to the Fig. 1, Fig. 3 or Fig. 5 into two identical air ducts and, by means of fans 7 and 11 arranged in each, convey an airflow or air media flow independently of one another. The air flow rate remains constant due to the continuous operation of the fans 7 and 11. Both the first fan 7, driven by the exhaust air media flow in the airflow duct 2, and the second fan 11, driven by the supply air media flow, ensure a simultaneous continuous airflow exchange in the operating state, albeit in opposite directions. This process of separate airflow exchange is made possible by the division of the airflow duct 2 into two air ducts, which separate the exhaust air media flow 9 from the supply air media flow 10 according to the Fig. Separate 1 to 5 spatially from each other.

[0043] After the Fig. In the first fan 7, arranged in the airflow duct 2, a radial fan, draws in the exhaust air stream 9 at an angle of 90° to the axis of rotation 40 through an inlet surface 8. The radial fan 7 is positioned centrally along the length of the airflow duct 2 and, with the opposite side of the inlet surface 8, is flush with a partition plate 30' and the axis of symmetry 35 of the airflow duct 2. The second fan 11, also a radial fan, has its housing casing in contact with the partition plate 30', but on the opposite side of the partition plate 30' from the axis of symmetry 35 of the airflow duct 2. The fans 7 and 11 are therefore arranged in a mirror-image configuration. The fan 11 draws in the supply air media flow 10 at an angle of 90° towards the axis of rotation 41 through a flow surface 12.The fan 11 is also positioned centrally along the length of the airflow channel 2 and forms a flush position with the opposite side of the approach surface 12 on a partition plate 30' with the axis of symmetry 35 of the airflow channel 2.

[0044] To form the separate flow channels in the airflow duct 2, the separating elements 30, 30' and 42, 42' are arranged in a row along the axis of symmetry 35, from the first free end 13 to the second free end 15. The arrangement of the interior baffle 16 and the exterior baffle 14 allows for additional spatial separation of the airflows at the transition between the interior 4 of room 5 and the exterior 6 of the building. This prevents the mixing of the two airflows. The direct arrangement of the functional components allows for a compact design of the ventilation device 1. The ventilation device 1 is suitable for building walls 3 with thin walls as well as for building walls 3 with thick walls. Furthermore, the ventilation device 1 gains in stability over its length through the separating elements, consisting of the separating plates 30, 30' and the separating webs 42, 42', of the basic framework of the airflow duct 2.

[0045] After the Fig. The ventilation device 1 has a cylindrical cross-section, as shown in sections 1 to 5. A penetration in the building wall 3 for the airflow duct 2 of the ventilation device 1 can be created using a core drill bit due to its cylindrical shape. The inner panel 4, which is also cylindrical and adapted to the airflow duct 2, is located according to the... Fig. 1 to 5 consists of an outer tube 37, aperture mounts 38, 38' and the aperture cover 39, furthermore the filters 32, 32', which each filter the exhaust air and supply air media stream 9, 10, also a partition plate 30 and the outer aperture 14 according to the invention, with the weather protection 23 and the weather protection carrier 24. Reference symbol list 1 ventilation device 2 airflow channel 3 Building wall 4 Inside 5 rooms 6 Outside 7 first fan 8 Inflow area 9 Exhaust air media flow 10 Supply air media flow 11 second fan 12 Inflow area 13 first free end 14 Outer panel 15 second free ending 16 Inner panel 17 Cross section 18, 18' first canal section 19, 19' second canal section 20 Cross section 21 free ending 22 Cross section 23 Weather protection 24 weather protection beams 25 Rand 26 Condensate drain 27 Drainage channel 28 inner tube 29 Outer pipe 30, 30', 30" partition plate 31, 31' Fan mount 32, 32' Exhaust and supply air filters 33 Interior plaster 34 Exterior plaster 35 Axis of symmetry 36 Water drain pipe 37 Outer pipe 38, 38' aperture 39 lens caps 40 Rotary axis 41 axis of rotation 42, 42' Separating walkway QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3168544 B1

[0003] DE 202014003368 U1

[0004] EP 0517701 B1

[0005]

Claims

[1] Ventilation device (1) for ventilating and extracting air from rooms (5) of a building, comprising an airflow duct (2) for connecting an inner side (4) of the room (5) separated from a building wall (3) to an outer side (6) of the building, comprising a first fan (7) arranged in the airflow duct (2) as a radial fan, with an airflow area (8) for an exhaust air media flow (9) or supply air media flow (10) and a second fan (11) as a radial fan in the airflow duct (2) with an airflow area (12) for an exhaust air media flow (9) or supply air media flow (10), wherein the fans (7,11) in an operating state simultaneously with opposite air conveyance directions for conveying the supply air media flow (10) from the outside (6) to the inside (4) of the room (5) and for conveying the exhaust air media flow (9) from the inside (4) of the room (5) to the outside (6) for continuous exchange, or in an operating state together in one air conveyance direction for conveying the exhaust air media flow (9) or for conveying the supply air media flow (10), wherein the airflow duct (2) has an outer baffle (14) at a first free end (13) towards the outside (6) and an inner baffle (16) at a second free end (15) towards the inside (4), , characterized by, that the airflow duct (2) is circular while maintaining the same cross-section (17), that the outer panel (14) has a first duct section (18) to which a second duct section (19) is attached, wherein the cross-section (20) of the first duct section (18) is adapted to the cross-section (17) of the airflow duct (2) and is operatively connected with its free end (21) to the first free end (13) of the airflow duct (2), wherein the second duct section (19) forms a reduced cross-section (22) compared to the first duct section (18) and the airflow duct (2), to which a weather protection (23) is attached on the visible outer surface (6), wherein the weather protection (23) is adapted to the size of the cross-section (22). [2] Ventilation device (1) according to claim 1, characterized by, that the ventilation device (1) forms a slide-in module with the functional element and the weather protection (23), wherein the slide-in module as an integral building unit together with the weather protection (23) is slidably inserted or pulled out from the inside (4) of the room (5) into an outer pipe (29) of the ventilation device (1) mounted in the building wall (3). [3] Ventilation device (1) according to claim 1, characterized by , that the outer panel (14) consists of the weather protection (23) to which a weather protection carrier (24) is attached, wherein the weather protection carrier (24) has a first channel section (18') and a second channel section (19') which are each adapted to the first channel section (18) and the second channel section (19) of the weather protection (23) and form an effective connection to each other by means of a sliding joining. [4] Ventilation device (1) according to claim 3, characterized by, that the weather protection carrier (24) has a condensate drain (26) at the edge (25) of the first channel section (18') which adjoins or extends beyond the outside (6) of the building wall (3) via a drain channel (27). [5] Ventilation device (1) according to claim 4, characterized by that the drainage channel (27) is a drain pipe (37) or a drip edge. [6] Ventilation device (1) according to claim 1 and 2, characterized by , that the airflow channel (2) forms a housing shell consisting of an inner tube (28) and the outer tube (29). [7] Ventilation device (1) according to claim 6, characterized by that the inner tube (28) is telescopically displaceable in the outer tube (29), wherein the inner tube (28) fixably receives the functional elements of the ventilation device (1). [8] Ventilation device (1) according to claim 7, characterized by, that the functional elements consist of the first and second fan (7, 11), the outer and inner cover (14, 16), partition plates (31, 31'), dividers (42, 42'), fan mounts (31, 31'), and filters (32, 32').

Images