EP3584511A1 - Ventilation device with noise absorber attachment - Google Patents

Abstract

The invention relates to a ventilation device (1) with a housing (2), a heat exchanger arranged in the housing, a supply air duct (4), an exhaust air duct (5), an exhaust air duct (6), an outside air duct (7), a first fan ( 8), a second fan (9) and a silencer attachment (20). The silencer attachment (20) has a first, a second, a third, a fourth air guide unit (21, 22, 23, 24) with a first, a second, a third, a fourth air duct (36, 37, 38, 39) and a first, a second, a third, a fourth connection opening (25, 26, 27, 28) for connection to the supply air duct (4), the exhaust air duct (5 ), the exhaust air duct (6), the outside air duct (7) of the ventilation device (1), at least two air guiding units (21, 22, 23, 24) having a sound insulation material (50). The invention also relates to a silencer attachment (20) with four air guiding units (21, 22, 23, 24) for guiding an air flow (60) and to mounting a silencer attachment (20) on a ventilation device (1).

Description

The invention relates to a ventilation device with a housing, a heat exchanger arranged in the housing, an inlet air duct, an exhaust air duct, an exhaust air duct, an outside air duct, with a first fan, a second fan and a silencer attachment. Furthermore, the invention relates to an installation of a silencer attachment on a ventilation device.

Ventilation devices, in particular central ventilation devices, which have at least one supply air duct, one exhaust air duct, one exhaust air duct and one outside air duct are known on the market. Furthermore, central ventilation units have a heat exchanger that extracts the heat contained in the exhaust air and uses it to heat the incoming fresh air. The air is conveyed by two fans, of which a first fan conveys the fresh, heated air into the living area and a second fan conveys the used air out of the living area. Ventilation devices are known in which the first fan is arranged in the supply air duct and the second fan in the exhaust air duct. Another arrangement of fans is also possible. For particularly sensitive rooms, such as living rooms, silencers are installed on the individual air ducts.

In the EP 3 117 156 A1 a silencer for a ventilation system is shown. The muffler can be integrated in the air duct intended for air guidance or forms a partial section of the ventilation duct. The muffler has at least two muffler segments which are arranged spaced apart from one another in order to form a muffler channel between the mutually facing surfaces of the two segments, which extends from the inlet to the outlet of the muffler. The two segments are mounted so as to be movable relative to one another to be able to move at least partial areas of the surfaces of the segments towards or away from one another.

Starting from the prior art, the invention has for its object to provide a ventilation device with a silencer attachment of the type mentioned, in which the propagation of sound in the living area can be reduced in a structurally simple manner. In addition, the task is to implement sound absorption in the smallest possible space and to facilitate assembly.

The object is achieved by the features of the characterizing part of claim 1. Advantageous developments and further developments of the invention, which can be used individually or in combination, are the subject of the dependent claims.

The invention is based on the idea of providing a silencer attachment for a ventilation device, which has a first, a second, a third, a fourth air duct unit with a first, a second, a third, a fourth air duct and a first, a second, a third, a fourth connection opening for connection to the supply air duct, the exhaust air duct, the exhaust air duct, the outside air duct of the ventilation device, wherein at least two air duct units have a soundproofing material.

Preferably, two air duct units of the muffler attachment, in particular the first and the second air duct unit, have sound insulation for damping sound that propagates along the air duct units through which air flows. This is because, in particular, the first and second air duct units have an increased sound level as a result of the fans arranged in the supply air duct and in the exhaust air duct of the ventilation device.

In another advantageous embodiment, the first and third air duct units have sound insulation material. The first and third air duct units are also important in terms of preventing sound propagation, since their fluid lines lead into the living area, where the fresh air is introduced and the used air is discharged. Annoying noises have to be reduced here.

It is also advantageous that the first and fourth air duct units have soundproofing material.

According to a further advantageous embodiment, the third and fourth air duct units have soundproofing material.

Optionally, the second and third air duct units can also preferably have sound insulation material.

An advantageous idea of the invention is that the air duct units of the silencer attachment have air ducts.

The first air duct preferably has a first duct with sound insulation material, the second air duct has a second duct with sound insulation material, the third air duct has a third duct with sound insulation material and / or the fourth air duct has a fourth duct with sound insulation material. The fact that all four air ducts have soundproofing material reduces the propagation of sound into the living area.

The soundproofing material is preferably a closed-pore material such as polyester fleece, polyether foam, melamine foam and / or another commercially available material for sound reduction in various material thicknesses, by means of which the sound is absorbed. It is also advantageous that at least two of the abovementioned soundproofing materials, such as polyester fleece, polyether foam, melamine foam, can be used in combination for the soundproofing insert in the air duct units.

The lower the frequency and the louder the sound source, the thicker the sound insulation material, for example the polyether foam, should be selected for effective sound insulation. Since massive foams should be used for sound insulation, this is also associated with a higher weight.

In a particularly advantageous embodiment, the soundproofing material has a skin for easy and hygienic cleaning of the surface.

Preferably, the muffler attachment has the sound insulation material with which the inner walls are lined.

The soundproofing material preferably has five soundproofing elements, of which three soundproofing elements are provided over the entire surface of three inner walls of the four air duct units in an advantageous embodiment. The three soundproofing elements are preferably arranged outside the first, second, third and / or fourth duct of the air guidance units. A fourth sound insulation element can preferably be provided on the fourth inner wall, which has the outlet opening for connecting the fluid line. A fifth sound insulation element is provided as a cover, which closes the air duct unit to an upper surface of the silencer attachment. A sixth sound insulation element is arranged on a device for redirecting the air flow, in particular on the first, second, third and / or fourth deflection, in the air guide units between the connection opening and the outlet opening.

It is common for the soundproofing material to be glued to the substrate using an adhesive, preferably an assembly adhesive or a pressure-sensitive adhesive. In an advantageous embodiment, the ground corresponds to the three inner walls and the device for diverting the air flow. In an advantageous embodiment, the soundproofing material can also be self-adhesive, in particular with a self-adhesive layer.

Optionally, the use of adhesives can be dispensed with, provided that the four individually installed soundproofing elements of an air duct unit are dimensioned such that they press against each other during assembly and prevent fluid exchange between the individual air duct units and to the outside during operation of the ventilation unit.

In the case of larger soundproofing elements and especially when an additional soundproofing element is applied to a soundproofing element, an additional mechanical fixation may be necessary.

An additional layer, which is hygienically easy to clean, can preferably be provided on the hewn closed-pore soundproofing material.

Optionally, an open-pore material with a porous surface, such as glass fiber fleece, can be used, which absorbs the sound waves.

According to a further advantageous embodiment of the invention, at least two lateral outlet openings for guiding the deflected air flow out of and / or into the air guiding units are provided on at least one lateral surface of the silencer attachment.

Four lateral outlet openings for guiding the deflected air flow out of and / or into the air guiding units are preferably provided on two lateral surfaces of the muffler attachment.

The muffler attachment is preferably a cubic or cuboid attachment which has four lateral surfaces and in which two air guidance units are preferably arranged opposite to two further air guidance units.

Four air duct units are preferably arranged in the cuboidal muffler attachment, the first and third air duct units facing the living area with their two outlet openings side by side on a common side surface and the second and fourth air duct units facing the outside air with their two outlet openings likewise side by side on a common side surface are, which is arranged opposite the first-mentioned lateral surface of the first and third air guide unit.

The silencer attachment can also have a trapezoidal shape or another advantageous shape with at least one side surface.

The at least one lateral surface of the silencer attachment, which is cuboid or trapezoidal, is preferably at an angle between 20 ° and 160 °, in particular between 45 ° and 90 °, to the underside and / or to the upper surface of the silencer attachment and / or to the base of the Ventilation device arranged.

In another advantageous embodiment, the silencer attachment can also be dome-shaped, round or approximately round. In this embodiment, the muffler attachment has only one side surface, so that the outlet openings are arranged on a round or curved side surface. An advantageous embodiment other than the embodiments mentioned here is also possible and is covered by this,

The upper surface preferably has a round base and / or a dome, on which no outlet opening is provided for connecting a fluid line. The dome is preferably arranged above the outlet openings of the muffler attachment on one side surface.

The silencer attachment preferably comprises the outlet openings in an approximately upper third of the lateral surface in the case of a dome-shaped, round or approximately round embodiment of a silencer attachment.

The air flow deflected by the air guide units and flowing through the outlet openings provided on the lateral surface has an angle to the underside of the silencer attachment. This flow angle is preferably between 30 ° and 110 °.

According to another preferred embodiment of the invention, at least one barrier for the fluid-tight separation of the air flow is arranged between the first and the second air guidance unit. The fact that at least one barrier is provided preferably results in four air guidance units, of which two air guidance units, in particular the first and the second air guidance unit and the third and the fourth air guidance unit, are preferably of identical size. It is furthermore advantageous that the barrier is provided between the first, the second, the third and the fourth air guidance unit.

The barrier is necessary to ensure the tightness of the four air duct units, so that the different air flows, in particular from the supply air duct, the exhaust air duct, and furthermore the exhaust air duct and the outside air duct, are not mixed with one another. The barrier also prevents unwanted fluid exchange between the individual air streams and the ambient air.

The four air guidance units are preferably sealed by means of the barrier by means of inserted metal sheets or by fluid-impermeable foils which are sealed off from the sheet metal housing.

Another aspect of the invention is that the first and second air duct units as well as the third and fourth air duct units have soundproofing material, at least two side outlet openings are provided on at least one side surface of the muffler attachment and that at least between the first, the second, the third and the fourth air guidance unit the barrier is provided.

At least one equalization device is preferably provided for equalizing the air flow in at least two air ducts of the air guide units, the equalization device being arranged approximately perpendicular to the direction of flow of the air flow.

The leveling device is preferably an additional layer, such as a plate with holes. The sheet can be a perforated sheet or a perforated sheet. The additional layer is preferably applied to the sound insulation material and serves as an interface between the flowing air streams and the sound insulation material, in particular in at least two air duct units. Because the additional layer preferably limits the exit of the incident sound waves within the sound insulation material, the propagation of sound in the direction of the fluid lines and into the living rooms is prevented. Turbulent flows are evened out. Optionally, a link silencer can also be provided for sound absorption.

The first, the second, the third and / or the fourth air guidance unit advantageously have at least one equalization device.

It has proven to be particularly advantageous that the at least one equalizing device or the perforated plate in the first air duct of the first air duct unit and in the second air duct of the second air duct unit is arranged approximately perpendicular to the direction of flow of the air stream.

It is also possible to design an equalization device as an additional layer on the sound insulation material along the inner walls of the air duct units parallel to the direction of flow of the air stream. Optionally, the perforated plate can also be arranged on at least two inner walls, preferably on five inner walls, of the air duct units.

According to a further advantageous aspect of the invention, the first air guidance unit has a first deflection, the second air guidance unit has a second deflection, and the third Air guidance unit on a third deflection and the fourth air guidance unit on a fourth deflection.

In another advantageous embodiment, the first and the second deflection and the third and the fourth deflection have approximately the same deflecting surfaces for guiding the air flow from the connection opening to the outlet opening, the first and the second deflection and the third and the fourth deflection being of the same size are and are preferably arranged mirror-symmetrically to each other in the air duct units.

The first and the second deflection preferably have at least two, but advantageously at least three, deflecting surfaces for diverting the air flow.

It is also advantageous that the equalization device is arranged between at least one inner wall and at least one deflecting surface of the deflections. In another advantageous embodiment, the deflection surfaces of the deflections have at least one equalization device.

In addition, the object is achieved by the features of claim 8. According to this, a silencer attachment with four air guide units for guiding an air flow from an inlet air duct, from an exhaust air duct and into an exhaust air duct and into an outside air duct is provided.

The silencer attachment preferably has four compact soundproofing components with air ducts which can be used in cavities of the silencer attachment. The four compact soundproofing components are preferably delimited by the barrier and / or the outer wall.

The four soundproofing components are preferably used in four cavities to the underside of the silencer attachment. In another embodiment, at least two interconnected soundproofing components are inserted in at least one cavity. The soundproofing components are preferably connected via a tongue and groove connection or another commercially available connection.

The soundproofing component preferably forms the interface to the air duct.

For the fluid-impermeable separation of the air streams from one another and in the direction of the outer wall, the soundproofing components preferably have a shield, in particular on the connecting surfaces to the adjacent soundproofing components. The shield can preferably be an applied protective layer or protective film or a sprayed-on protective layer. Other types of shields to prevent airflow mixing with each other, such as in the form of a sheet-like barrier, and in the direction of the outer wall are also possible and covered by this.

The fact that four compact soundproofing components are already used reduces the assembly time when insulating the silencer attachment and when servicing a silencer attachment.

In another advantageous embodiment, prefabricated soundproofing elements are used for soundproofing. In this case, soundproofing elements, preferably made of closed-pore soundproofing material with differently positioned cutouts, are arranged one on top of the other, which form the channels for fluid guidance. The superimposed soundproofing elements form a soundproofing complex. The coherent sound insulation complex, which has the four air ducts, is preferably used as a whole in the silencer attachment. In an advantageous embodiment, the individual sound insulation elements can be provided one above the other horizontally to the underside. In another advantageous embodiment, the soundproofing elements can be inserted into the at least one cavity vertically to the underside of the silencer attachment. In a further advantageous embodiment, the individual soundproofing elements can be arranged obliquely to the underside in the destination. A round arrangement of the soundproofing elements is also possible. It is also advantageous that the soundproofing elements are provided in different orientations in the at least one cavity of the silencer attachment. The individual soundproofing elements can thus preferably be arranged horizontally, vertically and / or obliquely to the underside. Round or other soundproofing elements can preferably be used to fill up small residual cavities.

It is also advantageous that the first, the second, the third and / or the fourth air duct have bulk material, in particular a large number of bodies, for sound insulation.

The bodies have a shape in a loose fill that leaves a large number of irregularly shaped channels between the bodies free. The fillers can be, for example, spheres, triangles, tetrapods or other shaped bodies, preferably with a closed-pore surface, which are preferably introduced into the four air guide units of the silencer attachment.

Optionally, the bulk material can preferably consist of activated carbon in order to filter out unpleasant smells, especially from the outside.

It is also advantageous that grilles or grille plugs are inserted into the connection openings and outlet openings. The grids or grille plugs prevent any packing migrate into the connected fluid lines and / or into the supply air, extract air, outside air and exhaust air duct of the ventilation unit.

The lattice plug preferably has a cylindrical design in which at least one end is closed in a lattice-like manner. The peripheral surface of the grating plug is preferably air-permeable through a plurality of openings.

In a further embodiment, the grid stopper can preferably have a covering made of fleece or fabric, which additionally catches fine particles, such as abrasion of the packing.

The inflowing air is forced through the grilles or the grille plugs to flow into the air guide units of the silencer attachment filled with the packing elements. There, the air finds its way through the irregularly shaped spaces, where the sound is reduced, in particular through multiple reflection and compression, and leaves the silencer attachment through the additional grille or grille stopper. Such a design with bulk material in the air duct units prevents the noise generated in the ventilation unit and its propagation into the pipe system in the building from being damped.

Another idea provides that the four above-mentioned soundproofing components with air ducts have a connection to the supply air duct, exhaust air duct, exhaust air duct and outside air duct of the ventilation device.

The muffler attachment with the four connection openings on its underside preferably has the connection diagram of the connection pieces of the supply air duct, the exhaust air duct, the exhaust air duct and the outside air duct of the ventilation device. This ensures a precise positioning of the muffler attachment on the connecting piece and facilitates assembly.

An additional adapter, which must be placed on the ventilation unit, is not required. The contact area between the connection openings of the silencer attachment and the connection piece is sealed with a sealant.

For optical reasons, the silencer attachment is advantageously dimensioned such that it represents an optically appealing unit with the ventilation device, for example in the form of an elongated tower in the vertical direction. For example, the edges of the muffler attachment can roughly match the edges of the ventilation device, so that preferably a flush surface is formed on the outside or the outside. In addition, the base area of the muffler attachment preferably has the same dimensions as the base area of the base of the ventilation device to be covered. Advantageously, the four air duct units of the muffler attachment are compact and implemented in a small space, so that the sound absorption is not particularly noticeable to an outsider.

Furthermore, the object is achieved by the features of claim 10. According to this, a silencer attachment is mounted on a ventilation device, in particular a silencer attachment according to one of claims 1 to 9.

For assembly, the silencer attachment with the connection openings is placed on a base of the ventilation device, in particular on a connection stub of the supply air duct, exhaust air duct, exhaust air duct, outside air duct, at least two side outlet openings being connected to a fluid line for guiding the air flow on at least one side surface.

• Fig. 1 zeigt ein zentrales Lüftungsgerät mit einem Schalldämpferaufsatz;
• Fig. 2 zeigt das zentrale Lüftungsgerät gemäß Fig. 1;
• Fig. 3 zeigt das zentrale Lüftungsgerät in einer perspektivischen Draufsicht;
• Fig. 4 zeigt den Schalldämpferaufsatz gemäß Fig. 1;
• Fig. 5 zeigt das Schalldämmmaterial im Schalldämpferaufsatz von oben;
• Fig. 6 zeigt zwei gegenüberliegende Luftführungseinheiten des Schalldämpferaufsatzes in einer Seitenansicht in einer Schnittdarstellung;
• Fig. 7 zeigt den Schalldämpferaufsatz gemäß Fig. 6 in einer perspektivischen Ansicht;
• Fig. 8 zeigt ein Schalldämmelement mit einem Ausschnitt;
• Fig. 9 und Fig. 10 zeigen verschiedene Ausführungen eines Schalldämpferaufsatzes;
• Fig. 11 zeigt eine Explosionsdarstellung des Schalldämpferaufsatzes mit übereinandergelegten Schalldämmelementen;
• Fig. 12a und 12b zeigen die aufeinandergelegten Schalldämmelemente innerhalb der Luftführungseinheiten in einer Draufsicht und einer Schnittansicht;
• Fig. 13a, 13b und 13c zeigen die Schalldämmelemente in einer perspektivischen Ansicht;
• Fig. 14a zeigt ein kompaktes Schalldämmbauteil und
• Fig. 14b und 14c zeigen die fertigungstechnischen Schritte zur Herstellung eines Schalldämmbauteils gemäß Fig. 14a.

Further details, features and advantages of the subject matter of the invention emerge from the subclaims and from the following description of the associated drawings, in which a preferred exemplary embodiment of the invention is shown by way of example.

• Fig. 1 shows a central ventilation unit with a silencer attachment;
• Fig. 2 shows the central ventilation unit according to Fig. 1 ;
• Fig. 3 shows the central ventilation device in a perspective top view;
• Fig. 4 shows the silencer attachment according to Fig. 1 ;
• Fig. 5 shows the soundproofing material in the silencer attachment from above;
• Fig. 6 shows two opposite air guide units of the silencer attachment in a side view in a sectional view;
• Fig. 7 shows the silencer attachment according to Fig. 6 in a perspective view;
• Fig. 8 shows a soundproofing element with a section;
• Fig. 9 and Fig. 10 show different versions of a silencer attachment;
• Fig. 11 shows an exploded view of the silencer attachment with superimposed sound insulation elements;
• Fig. 12a and 12b show the superimposed soundproofing elements within the air duct units in a plan view and a sectional view;
• 13a, 13b and 13c show the soundproofing elements in a perspective view;
• 14a shows a compact soundproofing component and
• 14b and 14c show the manufacturing steps for manufacturing a soundproofing component according to 14a ,

Fig. 1 shows a central ventilation device 1 with a housing 2 and a muffler attachment 20 placed on the ventilation device 1. The muffler attachment 20 shown in the exemplary embodiment has four lateral surfaces 34 and an upper surface 52, with outlet openings 30, 31, 32 on two opposite lateral surfaces 34 , 33 are provided for connection to four fluid lines 61. The lateral surfaces 34, the underside 29 and the upper surface 52 preferably form a cuboid. The fluid lines 61 are connected to the outlet openings 30, 31, 32, 33 via connecting flanges 51 which are inserted into the outlet openings 30, 31, 32, 33.

The central ventilation device 1 has, according to Fig. 2 and 3 , a supply air duct 4, an exhaust air duct 6, an outside air duct 7 and an exhaust air duct 5, which preferably protrude from the base 11 of the ventilation device 1. Optionally, the supply air duct 4, the exhaust air duct 6, the outside air duct 7 and the exhaust air duct 5 can be provided elsewhere on the ventilation unit 1. According to the exemplary embodiment shown, a first fan 8 is provided for guiding the air flow 60 in the supply air duct 4 and a second fan 9 in the exhaust air duct 5. Furthermore, the supply air duct 4, the exhaust air duct 6, the outside air duct 7 and the exhaust air duct 5 have a connecting piece 10 for connecting the ventilation device 1 to the silencer attachment 20. Also shown on the base 11 is a cover 62 for a connection terminal for which a connection cavity 64 ( Fig. 6 ) is provided.

Fig. 4 shows the silencer attachment 20 according to Fig. 1 , which is placed on the ventilation unit 1. The muffler attachment 20 has the four air guide units 21, 22, 23, 24 on the inside, behind the side surfaces 34 ( Fig. 5 ). The silencer attachment 20 is closed from the outside with at least one, preferably four side surfaces 34, an underside 29, an upper surface 52, the upper surface 52 preferably being attached or being attachable to the projections of the four lateral surfaces 34. For stabilization, the upper surface 52 is connected approximately in the middle of the barrier 46 of the muffler attachment 20 below, via a web 59.

In Fig. 5 the sound insulation material 50 in the silencer attachment 20 is shown from above. The first air duct unit 21, the second air duct unit 22, the third air duct unit 23 and the fourth air duct unit 24 have the sound insulation material 50 on the inside on the inner walls 56a, 56b, 56c, 56d, 57 and the deflections 40, 41, 42, 43. The exemplary embodiment shows the first sound insulation element 50a on the first inner wall 56a and on the second inner wall 56b the second sound insulation element 50b, on the third inner wall 56c the third sound insulation element 50c and the sixth sound insulation element 50f on the first, second, third and / or fourth deflection 40, 41, 42, 43 of an air duct unit 21, 22, 23, 24. Separates the air guide units 21, 22, 23, 24 in the exemplary embodiment shown by a barrier 46, on which a web 59 is provided for connection to the upper surface 52. Furthermore, the connection openings 25, 26, 27, 28 through which the air stream 60 flows can be seen.

Fig. 6 shows two opposite air guide units 21, 24 of the silencer attachment 20 in a side view in a sectional view. The first and fourth air guide units 21, 24 shown have a first inner wall 56a on the inside, which is preferably parallel to the outlet openings 30, 33 shown on a fourth inner wall 56d. Furthermore, the air duct units 21, 22, 23, 24 have a fifth inner wall 57, which is preferably parallel to the underside 29 of the muffler attachment 20 and seals the air duct unit upwards. The first inner wall 56a and the fifth inner wall 57 are preferably arranged at right angles to one another. Furthermore, the air guide units 21, 22, 23, 24 have a second inner wall 56b and a third inner wall 56c, which are arranged opposite one another and are preferably formed at right angles to the first and fourth inner walls 56a, 56d.

The first air guide unit 21 has a first air guide 36 with a first channel 36a between the connection opening 25 and the outlet opening 30. The fourth air duct unit 24 has a fourth air duct 39 with a fourth duct 39a between the connection opening 28 and the outlet opening 33.

Due to a possibly increased sound volume due to the first fan 8 preferably arranged in the supply air duct 4 of the ventilation device 1 and the second fan 9 arranged in the exhaust air duct 5, the first and the second air duct units 21, 22 are provided with a thicker sound insulation material 50 compared to that third and fourth air guide units 23, 24. It is also advantageous that the air flow 60 is redirected several times at the first and second deflection 40, 41. A multiple redirection of the air flow 60 considerably reduces the propagation of sound, in particular in the first and second air guidance units 21, 22.

According to a further aspect of the invention, the soundproofing material 50 preferably has six soundproofing elements 50a, 50b, 50c, 50d, 50e, 50f, in particular five soundproofing elements 50a, 50b, 50c, 50e, 50f, of which three soundproofing elements 50a, 50b, 50c on the first, second and third inner walls 56a, 56b, 56c are arranged. The sound insulation element 50e is as Upper lid provided on the fifth inner wall 57. And at the first, second, third and / or fourth deflection 40, 41, 42, 43 the sound insulation element 50f is provided.

The sound insulation material 50 has different material thicknesses d. So the sound insulation material 50 according to Fig. 6 preferably 6 different material thicknesses d, for example d1 to d6 between 5 mm and 200 mm. The soundproofing material 50 for the first and second air guiding units 21, 22 preferably has a thicker material thickness d.

At least one equalization device 48, such as a perforated plate, is preferably provided on the first and second air guide units 21, 22, in particular on the first, second, third and / or fourth air guide units 21, 22, 23, 24, in order to prevent turbulence Air flow 60, in particular from the supply air duct 4 and the exhaust air duct 5, to be standardized and / or made more uniform.

The perforated plate can be provided on each inner wall 56a, 56b, 56c, 56d, 57 and / or on each deflection 40, 41, 42, 43 within the air guide units 21, 22, 23, 24, at which the air stream 60 flows past.

The perforated plate is preferably arranged perpendicular to the flow direction S of the air stream 60, in particular between the first and the fifth inner wall 56a, 57.

It is also advantageous that the perforated plate is arranged between the first inner wall 56a and the first, the second, the third and / or the fourth deflection 40, 41, 42, 43.

According to another advantageous embodiment, the perforated plate is provided between the second inner wall 56b and the first, the second, the third and / or the fourth deflection 40, 41, 42, 43.

A support 45 for guiding the air flow 60 on the side surface 34 facing the outlet opening 30, 31 is provided in the first and second air guiding units 21, 22 as a stand for the first and the second deflection 40, 41. The holder 45 is preferably a sheet metal construction with at least two, in particular at least three, preferably four or more deflection surfaces 49.

In a particularly advantageous embodiment, the holder 45 is an oblique square. The degree of deflection is determined in particular by the height H of the holder 45 or the distance from two opposite deflecting surfaces 49.

In another advantageous embodiment, the holder 45 is designed as a sheet metal construction without a height H, on which the sound insulation material 50, in particular the sixth sound insulation element 50f, is arranged.

The third and fourth deflections 42, 43 are preferably formed by a C-shaped configuration of the sound insulation material 50 in the third and fourth air guide units 23, 24, at which the air flow 60 flows to the outlet opening 32, 33. The third and fourth deflection 42, 43 preferably have at least two deflection surfaces 49.

Furthermore, the connection openings 25, 26, 27, 28 have a lower opening 54 and an upper opening 53 for adapting the radius from the connection piece 10 to the air ducts 36, 37, 38, 39 of the air duct units 21, 22, 23, 24 ( Fig. 6 . 7 ).

The underside 29 of the silencer attachment 20 is formed by a sound insulation base 50g with the connection openings 25, 26, 27, 28 for connection to the ventilation device 1. The sound insulation base 50g is preferably formed from an EPS or EPP material.

Because the soundproofing elements 50a, 50b, 50c, 50d, 50e, 50f are individually adapted to the inner walls 56a, 56b, 56c, 56d, 57 and / or deflections 40, 41, 42, 43 to be covered, they have different geometries ,

So that points in Fig. 8 shown sound insulation element 50b, 50c a corner cutout 35a with a cut edge 35b arranged approximately perpendicular to the surface of the sound insulation element. The sound insulation element 50b, 50c shown is preferably provided on a second and / or third inner wall 56b, 56c in the air guide units 21, 22, 23, 24, adapted to at least two of the four deflections 40, 41, 42, 43 Fig. 8 sound insulation element 50b, 50c, preferably shown, the cutout of the sound insulation element can also be arranged at another location. This depends, for example, on the construction situation to be found, in particular the deflection, the outlet opening, the connection opening or another air guidance element in the muffler attachment 20. The soundproofing element can preferably also be provided without a cutout 35a, in particular for the first inner wall. The soundproofing elements preferably have corners, and in a particularly advantageous embodiment the corners can also be rounded. It is also advantageous that the soundproofing elements have round edges and / or corner edges. The curves and / or corners are only due to the design and have no effect on the sound.

Fig. 9 and Fig. 10 show different versions of a silencer attachment 20. Thus, the silencer attachment 20 can be compared to the silencer attachment version in Fig. 1 , have at least one lateral surface 34 which is not perpendicular to the upper surface 52 and / or the underside 29. The silencer attachment 20 can also have curved lateral surfaces 34 on which the fluid lines 61 are arranged ( Fig. 1 ). The invention also includes a silencer attachment 20 with an upper surface 52, which is designed in particular as a dome which is not parallel to the underside 29 of the muffler attachment 20 and / or to the base 11 of the ventilation device 1.

Furthermore, the silencer attachment 20 has an outer wall on at least one upper surface 52 and / or at least one lateral surface 34 to protect the first, second, third and / or fourth air guide units 21, 22, 23, 24.

The air flow 60 deflected by the first, the second, the third and / or the fourth air guide unit 21, 22, 23, 24 and flowing on the side surface 34 through the outlet openings 30, 31, 32, 33 has an angle α to the underside 29 of the silencer attachment 20. This flow angle α is preferably between 30 ° and 110 °.

Fig. 11 shows an exploded view of the silencer attachment 20 with a plurality of superimposed soundproofing elements which form a soundproofing complex 50m. In the embodiment shown, the plurality of superimposed soundproofing elements 50i per layer 4 have changing cutouts 35a, which in the superimposed state form the four channels 36a, 37a, 38a, 39a to the outlet openings 30, 31, 32, 33.

Fig. 12a and Fig. 12b show a top view and a sectional view of the plurality of superimposed soundproofing elements 50i within the air guidance units 21, 22, 23, 24, which are delimited by the barrier 46 from one another. The sound insulation elements 50i are preferably provided within the four air guide units 21, 22, 23, 24 created by the at least one barrier 46. This embodiment is particularly advantageous since, due to the channels introduced, which are sealed off from the sheet metal housing, there is no fluid exchange between the four channels 36a, 37a, 38a, 39a.

In another advantageous embodiment, but not shown, the soundproofing elements 50i can also be arranged vertically to the underside of the silencer attachment 20. Furthermore, the soundproofing elements 50i can preferably be provided obliquely or diagonally in the silencer attachment 20. In a further advantageous embodiment, the sound insulation elements 50i can be combined. The soundproofing elements 50i can thus be inserted horizontally, vertically and / or obliquely into the cavity or cavities 58 of the silencer attachment 20. Under certain circumstances, it can also be advantageous to insert the sound insulation elements 50i round into the silencer attachment 20. It is advantageous to choose an alternating alignment and / or a rectified alignment of the sound insulation elements.

13a, 13b, 13c show the sound insulation elements 50i, which according to Fig. 12a and 12b in a plurality in the air duct units 21, 22, 23, 24 are placed horizontally one above the other and thus form the sound insulation complex 50m. The soundproofing elements 50i have cutouts 35a, the per Layer are formed differently. So that points in 13a Soundproofing element 50i shown as an example shows a cutout 35a with an elongated hole opened on the right-hand side. The soundproofing element 50i in Fig. 13b has a cutout 35a which is designed as a closed or limited elongated hole. 13c shows a cutout 35a in an elongated hole shape, the elongated hole being shortened and somewhat offset from the elongated hole in FIG Fig. 13b is trained.

The fact that a plurality of prefabricated sound insulation elements 50i with cutouts 35a is preferably used provides a maximum amount of absorber material for reducing the sound propagation. Furthermore, the cutouts 35a have cut edges 35b, preferably at an angle between 10 and 100 degrees. The cut edges 35b of the sound insulation elements 50i are preferably provided with a skin. Depending on the fineness of the channel contours, different material thicknesses d. Adequate tightness and flexible assembly can be ensured by the closed-pore sound insulation material 50 and the gluing of the plurality of sound insulation elements 50i placed one above the other.

Between 3 and 300 sound insulation elements 50i are preferably used, which can preferably also be used in the silencer attachment 20 in different orientations.

It has been found to be particularly advantageous that simple deflection per channel 36a, 37a, 38a, 39a is achieved with as much sound insulation material as possible.

Preferably, the cut edges 35b of the cutouts 35a on the sound insulation elements 50i are subsequently provided with a skin. The skin on the cut edges 35b of the soundproofing elements 50i is necessary for easy and hygienic cleaning, since the air stream 60 comes into contact almost only with the cut edges 35b and not with the surfaces of the soundproofing elements 50i that have already been cut.

In order to reduce the installation effort, in a particularly advantageous embodiment, instead of the plurality of soundproofing elements placed one above the other, at least one compact soundproofing component 50k, preferably four soundproofing components 50k, can be used for each airflow 60. This in 14a The connected soundproofing component 50k shown advantageously has a soundproofing block, in particular a cuboid made of soundproofing material 50, with an air duct 36, 37, 38, 39 for guiding the airflow 60 from the connection opening 25, 26, 27, 28 to the outlet opening 30, 31, 32 , 33 and / or from the outlet opening 30, 31, 32, 33 to the connection opening 25, 26, 27, 28. The air ducts 36, 37, 38, 39 are preferably milled into the sound insulation blocks. Depending on the manufacturing effort, further patterns for sound reduction can preferably be introduced into the milled air ducts 36, 37, 38, 39 of the compact block.

The 14b and 14c show the manufacturing steps for producing a soundproofing component 50k.

According to 14b the soundproofing block can be cut lengthways and / or crossways, for example in at least 2 sections, for manufacturing reasons, in order to proceed in the next step 14c to introduce the air ducts 36, 37, 38, 39, connection openings 25, 26, 27, 28, outlet openings 30, 31, 32, 33 and / or other patterns into the air ducts 36, 37, 38, 39 of the sound insulation component 50k. The cut parts are then connected to one another, for example by means of gluing. The resulting open-pore surfaces of the air duct 36, 37, 38, 39 are to be subsequently provided with a skin in order to enable easy and hygienic cleaning of the soundproofing components 50k.

Claims (10)

Ventilation device (1) with a housing (2), a heat exchanger arranged in the housing (2), a supply air duct (4), an exhaust air duct (5), an exhaust air duct (6), an outside air duct (7), with a first fan ( 8), a second fan (9) and a silencer attachment (20),
characterized,
that the silencer attachment (20) has a first, a second, a third, a fourth air guide unit (21, 22, 23, 24) with a first, a second, a third, a fourth air guide (36, 37, 38, 39) and a first, a second, a third, a fourth connection opening (25, 26, 27, 28) for connection to the supply air duct (4), the exhaust air duct (5), the exhaust air duct (6), the outside air duct (7) of the ventilation unit ( 1), at least two air duct units (21, 22, 23, 24) having a sound insulation material (50). Ventilation device (1) according to claim 1,
characterized,
that the first air duct (36) has a first duct (36a) with sound insulation material (50), the second air duct (37) has a second duct (37a) with sound insulation material (50), the third air duct (38) has a third duct (38a) Soundproofing material (50) and / or the fourth air duct (39) has a fourth channel (39a) with soundproofing material (50). Ventilation device (1) according to claim 1,
characterized,
that at least two side outlet openings (30, 31, 32, 33) for guiding the deflected air flow (60) out of and / or into the air guide units (21, 22, 23, 24) on at least one side surface (34) of the silencer attachment ( 20) are provided. Ventilation device (1) according to one of the preceding claims,
characterized,
that a barrier (46) for the fluid-tight separation of the air flow (60) is arranged at least between the first and the second air guidance unit (21, 22). Ventilation device (1) according to one of the preceding claims,
characterized,
that the first and second air duct units (21, 22) and the third and fourth air duct units (23, 24) have soundproofing material (50),
at least two side outlet openings (30, 31) are provided on at least one side surface (34) of the silencer attachment (20) and that at least between the first, second, third and fourth air duct units (21, 22, 23, 24) the barrier (46) is provided. Ventilation device (1) according to one of the preceding claims,
characterized,
that at least one equalizing device (48) is provided for equalizing the air flow (60) in at least two air ducts (36, 37, 38, 39) of the air duct units (21, 22, 23, 24), the equalizing device (48) being approximately vertical to the flow direction (S) of the air stream (60) is arranged. Ventilation device (1) according to one of the preceding claims,
characterized,
that the first air guidance unit (21) has a first deflection (40), the second air guidance unit (22) has a second deflection (41), the third air guidance unit (23) has a third deflection (42) and the fourth air guidance unit (24) has a fourth deflection ( 43). Silencer attachment (20) with four air duct units (21, 22, 23, 24) for guiding an air flow (60) from an inlet air duct (4), from an exhaust air duct (5) as well as into an exhaust air duct (6) and into an outside air duct (7) .
characterized,
that the silencer attachment (20) has four soundproofing components (50k) with air ducts (36, 37, 38, 39) which can be used in cavities (58) of the silencer attachment (20). Silencer attachment (20) according to claim 9,
characterized,
that the four soundproofing components (50k) with air ducts (36, 37, 38, 39) have a connection to the supply air duct (4), exhaust air duct (5), exhaust air duct (6) and outside air duct (7) of the ventilation unit (1). Installation of a silencer attachment (20) on a ventilation device (1), in particular a silencer attachment (20) according to one of the preceding claims 1 to 9,
the silencer attachment (20) with the connection openings (25, 26, 27, 28) on a base (11) of the ventilation device (1), in particular is placed on a connecting piece (10) of the supply air duct (4), exhaust air duct (5), exhaust air duct (6), outside air duct (7),
wherein at least two side outlet openings (30, 31, 32, 33) are connected to a fluid line (61) for guiding the air flow (60) on at least one side surface (34).

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