EP2574794A2 - Ventilation component - Google Patents

Abstract

The component has a channel-shaped casing (1) for accommodating silencer which is arranged behind the centrifugal fan (2) along air flow direction (4). A slot (3) filled with sound absorption material for noise reduction is provided in the casing, along air flow direction. The slot is formed in a circumferential free space (10) around which the gas is flowed. The number of regions of casing cross-section provided for slots, is corresponded to the number of theoretical cross-sectional areas of casing such that 64-81% of free flow cross-section of the casing is blocked.

Description

The invention relates to a ventilation component, comprising a channel-shaped housing of preferably rectangular or square cross-section, wherein in the housing at least one centrifugal fan and at least one silencer for flowing gases are provided, wherein in particular the silencer is arranged in the flow direction behind the centrifugal fan and at least one Having filled with an absorbent material backdrop.

A centrifugal fan includes an impeller driven by a drive motor. The impeller usually has a cover plate and a support disc, between which impeller blades are arranged. In a centrifugal fan, the air is usually sucked parallel to the drive axis of the centrifugal fan and deflected by the rotation of the radial impeller by 90 ° and blown out radially. The radial fans used in the present field do not have a housing disposed around the impeller.

Known mufflers have several juxtaposed scenes on. Two adjacent scenes form between each a flow channel. The scenes work according to the absorption principle or according to the absorption resonance principle or according to the resonance principle. The scenes are with their top and bottom with the inside of a gate frame or the housing in contact. Thus, the sound energy can penetrate only on the two parallel to the flow direction aligned side surfaces in the backdrop. The distance in known ventilation components between the edges of the impeller blades, which face the backdrop of the slotted silencer, on the one hand and the backdrop on the other hand, corresponds to the diameter of the support plate of the intended radial fan. Falling below this distance is not possible because otherwise the performance of the ventilation component would be significantly reduced by the pressure losses of the muffler. The flow rate is sometimes very low in the flow channels located in the middle of the housing.

The object of the invention is to avoid the aforementioned disadvantages and to provide a ventilation component with a silencer, which has a lower pressure loss with the same or optimized sound attenuation.

This object is achieved in that for each associated with a centrifugal fan backdrop, the area between the outer dimensions of the scenery seen in the flow direction is filled at least partially, that each backdrop is located at a distance to the next adjacent component and thus each backdrop on all sides of a circumferential space is surrounded to flow of the gas, so that each backdrop can be flowed around on all sides by the flowing gas, wherein the housing cross-section corresponding to the number of provided in a region of the housing cross-sections scenes number of theoretical housing cross-sectional portions each block having respect to its associated Gehäusquerschnittteilbereich between 55% and 90%, preferably locked between 64% and 81% of the theoretically free flow cross-section of the housing cross-sectional portion.

If the ventilation component has only one slide, the housing cross-sectional partial area corresponds to the housing cross-section. In one embodiment, for example with four scenes, a total of four theoretical housing cross-sectional portions are provided. The size of the housing cross-sectional portions may be identical or different. It is of course possible for a housing cross-sectional portion to be subdivided into housing cross-sectional lower regions.

In the case of the ventilation component according to the invention, at least one, preferably each, backdrop can not be flowed through even in the flow direction.

If the area between the outer dimensions of the scenery is only partially filled in a backdrop, it is advisable that the seen in the flow direction rear area of the backdrop is filled. Of course, the backdrop can also be filled over its complete, extending parallel to the flow direction length.

Preferably, the free space along the flow around the longitudinal extent of the backdrop, ie, seen in the flow direction, consistent. In this case, the outer dimensions of the backdrop, for example, parallel to the adjacent walls of the housing.

It is obvious that all distances - d. H. with a quadrangular housing four distances - can have matching percentages. But it is also possible that the distances are different from each other, but each distance is within the claimed range.

Each backdrop, for example, consist of several layers that are directly adjacent to each other. Due to the spaced arrangement of each backdrop to the inner wall of the housing and / or the adjacent backdrop, the sound energy can not only on the two parallel aligned to the flow direction side surfaces but u. a. also penetrate over the top and the bottom of each backdrop in the backdrop in question. At the same time due to the all-round flow around the pressure loss is reduced at least the same high sound attenuation.

Due to the design according to the invention, there is a circumferential clearance around each backdrop, which is possibly interrupted at most only by a holding structure holding the respective backdrop. For holding any backdrop, for example in the area of the top and bottom, holding rods. Other support structures, such. As wires or cables that fix the gate in the interior of the housing, are of course conceivable.

To further increase the efficiency, each link is preferably arranged at a very small distance from the impeller of the centrifugal fan. Under the distance, the geometric distance between the upstream side of a backdrop on the one hand and the edges of the impeller blades, which are arranged assigning the backdrop of the slotted silencer, on the other hand understood. It lends itself, though the aforementioned distance between the edges of the impeller blades, which are arranged facing the backdrop of the slotted silencer, and the upstream front of each backdrop between 1 to 20 cm, preferably between 5 to 10 cm, is located. In this case, the ventilation component according to the invention also has a particularly short overall length.

Each scenery consists of a sound absorbing effect absorbing material or is filled with such a material. At least one backdrop can be made for example of rock wool. The surface of the rock wool is preferably laminated with a glass silk fabric to prevent unwanted extraction of rock wool particles. On the outside, the backdrop in question 3, for example, have a perforated plate.

Each slide can be designed to be open, for example, in the area of its outer sides. But it is also quite possible that one or more of the flowing gas facing outer side (s) is open and another outer side is formed closed. In a closed design, chamber plates of a thickness of up to 0.35-0.5 mm are commonly used. Also a closed on all sides scenery is of course possible. In this case, the backdrop is completely surrounded by a sheet metal. Then it is a Resonatorkulisse. Resonator sheets can have a thickness between 0.5 mm and 2 mm. Of course, it is possible that seen in the flow direction several scenes are arranged one behind the other.

When at least one backdrop, the inflow-side and / or the outflow-side end face in the region of their Edges rounded or beveled. As a result, the pressure loss is reduced due to the better flow around. This also leads to a lower formation of intrinsic noises.

At least one slide is centered in its associated housing cross-sectional portion in a first direction and / or a second direction orthogonal to the first direction. Advantageously, all scenes are centered in their respective associated housing cross-sectional portion in a first direction and / or a second direction orthogonal to the first direction.

In a preferred embodiment of the invention, at least one, in particular each, radial fan in each case exclusively a single, block-like trained backdrop, in particular in the form of a cuboid associated. Of course, in the block-like backdrop also cavities may be provided, which contribute to the sound absorption. The scenery is flowed around from all sides, with the scenery with no outside in contact with the housing and / or the (the) adjacent backdrop (s). The pressure loss when using a suitably designed backdrop can be further reduced because due to the circumferential clearance, the radially outward from the radial fan air can continue to flow directly over the circumferential space in the flow direction.

Due to the very small distance between the edges of the impeller blades, which are arranged facing the backdrop of the slotted silencer, and the upstream side of the muffler, the overall length is reduced, so that Such a ventilation component is particularly suitable for use in a decentralized ventilation unit, for example in an underfloor ventilation unit. Of course, a use of the ventilation component according to the invention in an air conditioning central system is possible.

Since the distance between the edges of the impeller blades, which are arranged facing the backdrop of the slotted silencer, on the one hand and the silencer on the other hand, compared to the prior art is considerably shorter and sound power is delivered through a housing, the ventilation component according to the invention comes due to the shorter "distance range" significantly better acoustic properties between the impeller and the scenery.

The dimensions in at least one backdrop can be seen constant in the flow direction, so that thus the width of the free space - in parallel aligned walls of the housing - is constant in the flow direction.

In at least one setting, the dimensions can be seen in the flow direction, in particular stepwise, increase and thus the width of the free space seen in the flow direction - in parallel aligned walls of the housing - decrease. The increase in the dimensions of the slide in the flow direction may be formed continuously or discontinuously.

It is of course also possible that the housing has a corresponding, for example, step-like course, so that then the width, ie the height, of the free space seen in the flow direction remains constant.

It is advisable if the dimensions in the direction of flow decrease as seen in at least one backdrop, and thus the width of the free space seen in the flow direction increases - with parallel walls of the housing - increases. The reduction in the dimensions of the link in the flow direction may be formed continuously or discontinuously.

If the dimensions of the housing decrease or increase in the same proportion to the dimensions of the slide, the width, d. H. the height, the free space seen in the flow direction constant.

The dimensions can be seen discontinuously, in particular stepwise, reduce in at least one backdrop in the flow direction and thus can - seen in parallel walls of the housing - the width of the free space in the flow direction increase.

Alternatively, the dimensions can be seen in at least one backdrop in the flow direction in particular reduce continuously and thus can - seen in parallel walls of the housing - the width of the free space in the flow direction increase.

In a - at least partially - continuous reduction of the dimensions, the angle α between an outer side and pointing in the direction of flow center axis of the gate between 4 ° and 10 °, preferably 7.5 °, amount. Thus, the backdrop is designed in the manner of a diffuser. Due to the design of the scenery as a diffuser part of the dynamic pressure can be converted into static pressure.

At least one slide can have a recess for receiving part of the radial fan, in particular the drive motor, on the inlet side facing the radial fan. Such a configuration, the distance between the centrifugal fan and scenery and thus the overall length is further reduced.

At least one slide can have a quadrangular, in particular rectangular, cross section with four, in particular parallel to the housing aligned, outer sides.

In at least one backdrop, the transition region of two adjacent outer sides may be touched or rounded.

The centrifugal fan or the centrifugal fans can be arranged upstream of a common diaphragm in the flow direction, which has at least one opening, in particular for each centrifugal fan in each case an associated opening for the passage of the flow medium to the intake of the centrifugal fan or radial fans. Between the diaphragm and the radial fan and a connection piece may be provided.

It lends itself to when for additional sound insulation and / or sound attenuation in the region of at least one backdrop and preferably also in the, seen in the flow direction of the backdrop upstream region, ie in the region of the drive motor and the centrifugal fan, on the inside of the walls of the Housing at least one circumferential, preferably provided directly on the walls of the housing, soundproofing and / or sound damping material is provided. The free space is then between the circumferential, preferably provided directly on the walls of the housing, sound insulation and / or sound damping material and the backdrop. In such an embodiment, the distance of 5 to 10% determined by the corresponding inner dimension of the circumferential, preferably directly on the walls of the proposed soundproofing and / or sound damping material to the outside of the backdrop adjacent thereto. If a diaphragm is provided, the circumferential, preferably provided directly on the walls of the housing, soundproofing and / or sound damping material can reach up to the panel and be frontally with the panel in contact.

It is advisable if in the housing at least two side by side and / or superposed arrangements are each provided comprising a radial fan and a muffler with a filled with an absorbent material backdrop. Such a configuration can be arranged within an air-conditioning system so that a common inlet and a common outlet are provided. The assemblies are disposed between the inlet and the outlet in the housing so that the air flowing into the housing is "split up" onto the various assemblies.

At least one link can be arranged in the housing such that the link has a distance to the adjacent inner wall of the housing, which in particular is in each case 5 to 10% of the corresponding inner dimension of the housing.

At least one slide can be arranged in the housing such that the slide has a distance from the boundaries G of its housing cross-sectional portion, in particular is 5 to 10% of the corresponding dimension of the housing cross-section portion. If the ventilation component has only one slide, the housing cross-sectional partial area corresponds to the housing cross-section. Then, the walls of the housing, the limits G represent. In an embodiment with, for example, four scenes total of four theoretical housing cross-sectional portions are provided. The four boundaries of each housing cross-sectional portion are formed by two walls of the housing and by the two virtual theoretical limits G.

Fig. 1

eine Seitenansicht auf eine erfindungsgemäße Einheit,

Fig. 2

eine Sicht in Strömungsrichtung gesehen in die Einheit,

Fig. 3

eine Sicht entgegen die Strömungsrichtung in die Einheit,

Fig. 4 a-d

eine Seitenansicht, eine Draufsicht und ein schräge Draufsicht auf eine Kulisse nach den Fig. 1 bis 3 im vergrößerten Maßstab, wobei Fig. 4c die Kulisse ohne eine Ausnehmung und Fig. 4d die Kulisse mit einer Ausnehmung zeigen,

Fig. 5 a-c

eine Seitenansicht, eine Draufsicht und ein schräge Draufsicht auf eine erste alternative Ausführungsform einer Kulisse,

Fig. 6 a-c

eine Seitenansicht, eine Draufsicht und ein schräge Draufsicht auf eine zweite alternative Ausführungsform einer Kulisse,

Fig. 7 a-c

eine Seitenansicht, eine Draufsicht und ein schräge Draufsicht auf eine dritte alternative Ausführungsform einer Kulisse,

Fig. 8 a-c

eine Seitenansicht, eine Draufsicht und eine schräge Draufsicht auf eine vierte alternative Ausführungsform einer Kulisse,

Fig. 9

den Gegenstand nach Fig. 1 ohne Schalldämpfer,

Fig. 10

eine Seitenansicht auf ein alternatives Ausführungsbeispiel eines erfindungsgemäßen Lüftungsbauteiles ohne Schalldämpfer,

Fig. 11

den Gegenstand nach Fig. 10 mit Schalldämpfer,

Fig. 12

ein erfindungsgemäßes Lüftungsbauteil mit vier nebeneinander angeordneten Anordnungen jeweils umfassend einen Radialventilator und einem Schalldämpfer entgegen die Strömungsrichtung gesehen,

Fig. 13

den Gegenstand nach Fig. 12 in Strömungsrichtung gesehen,

Fig. 14

eine Seitenansicht auf eine alternative Ausführungsform einer erfindungsgemäßen Einheit,

Fig. 15

eine Sicht entgegen die Strömungsrichtung in die Einheit gemäß Fig. 14,

Fig. 16

einen Schnitt in Richtung XVI-XVI durch den Gegenstand nach Fig. 14,

Fig. 17

einen Schnitt in Richtung XVII-XVII durch den Gegenstand nach Fig. 14,

Fig. 18

eine Seitenansicht auf eine weitere alternative Ausführungsform einer erfindungsgemäßen Einheit,

Fig. 19a-c

verschiedene Gehäusequerschnitte, wobei in Fig. 19c noch die Details U, V, W aus Fig. 19c in vergrößertem Maßstab dargestellt sind, und

Fig. 20

einen Schnitt durch ein erfindungsgemäßes Lüftungsbauteil mit vier nebeneinander angeordneten Kulissen.

Embodiments of the invention illustrated in the drawings are explained below. Show it:

Fig. 1

a side view of a unit according to the invention,

Fig. 2

a view seen in the flow direction in the unit,

Fig. 3

a view against the direction of flow into the unit,

Fig. 4 ad

a side view, a top view and an oblique plan view of a backdrop to the Fig. 1 to 3 on an enlarged scale, where Fig. 4c the scenery without a recess and Fig. 4d show the scenery with a recess,

Fig. 5 ac

a side view, a plan view and an oblique top view of a first alternative embodiment of a backdrop,

Fig. 6 ac

a side view, a plan view and an oblique plan view of a second alternative embodiment of a backdrop,

Fig. 7 ac

a side view, a plan view and an oblique plan view of a third alternative embodiment of a backdrop,

Fig. 8 ac

a side view, a plan view and an oblique plan view of a fourth alternative embodiment of a backdrop,

Fig. 9

the object after Fig. 1 without silencer,

Fig. 10

a side view of an alternative embodiment of a ventilation component according to the invention without silencer,

Fig. 11

the object after Fig. 10 with silencer,

Fig. 12

an inventive ventilation component with four juxtaposed arrangements each comprising a radial fan and a muffler opposite to the flow direction,

Fig. 13

the object after Fig. 12 seen in the flow direction,

Fig. 14

a side view of an alternative embodiment of a unit according to the invention,

Fig. 15

a view against the flow direction in the unit according to Fig. 14 .

Fig. 16

a section in the direction XVI-XVI through the object after Fig. 14 .

Fig. 17

a section in the direction of XVII-XVII through the object after Fig. 14 .

Fig. 18

a side view of a further alternative embodiment of a unit according to the invention,

Fig. 19a-c

different housing cross-sections, with in Fig. 19c still the details U, V, W from Fig. 19c are shown on an enlarged scale, and

Fig. 20

a section through an inventive ventilation component with four juxtaposed scenes.

In all figures the same reference numerals are used for identical or similar components.

In the Fig. 1 to 3 . 9 to 11 such as 14 to 19 a ventilation component is shown, which comprises a channel-shaped housing 1 with a rectangular cross-section, in which a radial fan 2 and a muffler for flowing gases are provided, wherein the muffler has a filled with an absorbent material backdrop 3. Since each one in the Fig. 1 to 3 . 9 to 11 such as 14 to 19 illustrated ventilation component only has a gate 3, the housing cross-sectional portion I corresponds to the housing cross-section.

The gate 3 is arranged behind the radial fan 2 as seen in the flow direction 4. In the embodiment of the Fig. 1 to 3 and 9 the centrifugal fan 2 is driven by a drive motor 5, which is arranged on the downstream side of the centrifugal fan 2. About a shaft of the centrifugal fan 2 and the drive motor 5 are interconnected.

The centrifugal fan 2 includes an impeller 2a driven by the drive motor 5. The impeller 2a has a cover disk 2b and a support disk 2c, between which a plurality of impeller blades 2d are arranged. The support disk 2c is arranged on the side facing the drive motor 5 side of the impeller 2a.

In the flow direction 4 seen in front of the centrifugal fan 2, a diaphragm 6 is arranged, which has a rectangular opening 7 for the passage of the gas to the intake of the centrifugal fan 2 out. Between the rectangular opening 7 in the aperture 6 and the suction of the centrifugal fan 2, a connecting piece 8 is provided.

Such as the Fig. 1 and 3 can be seen, the radial fan 2 with the drive motor 5 and the diaphragm 6 are fixed to a lower-side support structure 9, which is attached to the housing 1.

In the embodiments of the Fig. 1 to 13 each link 3 is formed as a single block-like design 3, wherein the slide 3 is arranged in the housing 1, that on all sides there is a distance from the housing 1. This results in a circumferential free space 10 for the flow of gas, which is interrupted only in the lower region of the support structure 9. In this way the backdrop 3 is surrounded on all sides by the flowing gas.

The fixation of the gate 3 relative to the housing 1 is not shown in detail. In the in the Fig. 1 to 3 illustrated embodiment, an attachment of the link 3 in the region of its lower-side upstream edge is indicated on the support structure 9.

In the in the Fig. 1 to 4 As well as 11 shown embodiment, the dimensions of the link 3 seen in the flow direction 4 decreases continuously, so that the link 3 seen in the side view has the shape of a truncated pyramid. The angle α between the outside and pointing in the direction of flow 4 center axis of the link 3 is in the illustrated embodiment about 7 °. Thus, the backdrop 3 is formed in the manner of a diffuser.

In the embodiment of the Fig. 5a to c each transitional area of two adjacent outer sides of the gate 3 is touched.

In the Fig. 6a to c is a backdrop 3 shown, which is designed as a cuboid.

The Fig. 7a to c show an embodiment in which the dimensions of the link 3 seen in the flow direction 4 at a point 11 increase in size and consequently the width of the free space 10 seen in the flow direction 4 - if the walls of the housing 1 are parallel - decreases in the area 11 , Both arranged one behind the other in the flow direction 4 Subregions of the gate 3 have in the illustrated embodiment, parallel side surfaces.

In the Fig. 8a to c an embodiment is shown in which the inflow-side region of the gate 3 is cuboid-shaped and reduce the dimensions of the gate 3 to the downstream end. As a result, the free space 10 initially having a constant width increases toward the downstream end, provided that the walls of the housing 1 are arranged in parallel.

As in Fig. 1 shown, in the illustrated embodiment, the gate 3 on the radial fan 2 facing upstream side has a recess 12 into which projects a part of the drive motor 5 of the centrifugal fan 2. This reduces the overall length of the ventilation component. The recess 12 is in detail in FIG Fig. 4c shown.

In the embodiment of the Fig. 10 and 11 the drive motor 5 is arranged in the hub of the centrifugal fan 2. Such centrifugal fans 2 are also referred to as fans with integrated directly in the impeller or flanged drive motor. The radial fan 2 has therefore seen in the flow direction 4 has a very short length. Thus, the distance between the edges of the impeller blades 2d, which face the gate 3, on the one hand and the link 3 on the other hand is very small, so that the overall length of the ventilation component is very low.

In the Fig. 9 and 10 is for better illustration of the structural design of the respective centrifugal fan 2, the respective gate 3 is not shown.

In Fig. 12 a ventilation component is shown, which in turn has a channel-shaped housing 1 with a rectangular cross-section. However, four radial fans 2 are arranged in the housing 1, wherein each radial fan 2 is assigned a respective muffler. Each muffler has a filled with an absorbent material backdrop 3. Since four scenes 3 are arranged in the housing 1, the housing cross-section has a corresponding number, namely four, theoretical housing cross-sectional portions I-IV.

Each link 3 is arranged in the flow direction 4 behind its associated centrifugal fan 2, so that in the in Fig. 12 View shown each backdrop 3 the upstream seen in the flow direction 4, its associated radial fan 2 hidden.

In the flow direction 4 seen in front of the four centrifugal fans 2, the diaphragm 6 is arranged, which has four rectangular openings 7 for the passage of the gas to the intake of the respective centrifugal fan 2.

Each link 3 is formed as a single block-like design gate 3, wherein each link 3 is arranged in the housing 1, that on all sides there is a distance from the housing 1 and the adjacent link 3. This creates around each backdrop 3 around a circumferential space 10 for the flow of gas, which is interrupted only in the respective lower region of a backdrop 3 of the support structure 9. In this way, each backdrop 3 is surrounded on all sides by the flowing gas. In the in Fig. 12 illustrated embodiment corresponds to the distance between two scenes 3 approximately twice the distance between a gate 3 to the adjacent inner wall of the housing. 1

The fixation of each link 3 relative to the housing 1 is not shown in detail. Each link 3 is fixed in the region of its lower-side upstream edge by means of a support structure 9 on the housing 1. The support structure 9 of each link 3 consists of two feet. The centrifugal fans 2 may be attached to the diaphragm 6, for example. The direction of rotation of the four centrifugal fans 2 is the same.

Also in the embodiment according to Fig. 12 The dimensions of the link 3, as seen in the flow direction 4, decrease continuously, so that each link 3 viewed in the side view has the shape of a truncated pyramid. The angle α between the outside and pointing in the direction of flow 4 center axis of the link 3 is in the illustrated embodiment about 7 °. Thus, each link 3 is formed in the manner of a diffuser.

In the FIGS. 14 to 17 an alternative embodiment of a ventilation component according to the invention is shown. Here is the backdrop 3 of a total of 5 components 3a-3e. These are four insulating panels 3b-3e arranged at right angles to each other and forming a quadrangle, the insulating panels 3b-3d enclosing the drive motor 5 laterally and laterally, while the lower insulating panel 3e only extends approximately as far as the drive motor 5 in the flow direction 4 borders. The cavity formed by the four insulating panels 3b-3e seen in the flow direction 4 behind the drive motor 5 completely by a Dämmklotz 3a filled, with its four sides with one of the four insulation boards 3b-3e in contact.

Furthermore, as seen in the flow direction 4 behind the diaphragm 6 arranged on the inside of the wall of the housing 1 on each wall, a sound insulation and / or sound damping plate as sound insulation and / or sound damping material 13. The free space 10 is formed in this embodiment between the inside of the sound-absorbing and / or sound-damping plate and the relevant outer side of one of the four insulating panels 3b-3e.

In Fig. 18 an alternative embodiment is shown. Here, the lower insulation board 3a extends into the region of the front edge of the drive motor 5, so that the drive motor 5 is circumferentially completely surrounded by the four insulating panels 3b-3e. The insulation boards 3b-3e form the recess 12 in the region of the end facing the flow direction 4.

In Fig. 19 are shown in sectional drawings possible cross-sectional shapes of a housing 1, wherein for reasons of clarity, only a gate 3 and the result of the arrangement of the link 3 in the housing 1 resulting free space 10 are located. As can be seen from the drawings, the height or width of the free space 10 is determined in the direction of the indicated arrows. The one end of each arrow is perpendicular to the surface of the gate 3 or on the corresponding tangent to a curved backdrop 3. The other end of the arrow is perpendicular to the adjacent inner side of the wall of the housing 1 and on the corresponding tangent in a curved Housing 1.

In the areas E of the corners or I of the inner corners, which are indicated by dashed lines in corresponding figures, is in the embodiments of the FIGS. 19a . c and d the free space 10, depending on the direction of measurement a little larger, provided that the corner of the housing 1 and the gate 3 is not rounded.

In Fig. 19c are in the details V and W on an enlarged scale, the areas I of an inner corner and in detail U on an enlarged scale, the area E of a corner Fig. 19c shown.

According to the embodiment Fig. 19b it is a round housing 1. The space 10 has the same width at each point.

This is also - with the exception of the four areas E, which are located in the four corners - in the square housing 1 after Fig. 19a the case. The space 10 has in the area of the four sides of the backdrop 3 a matching percentage.

In Fig. 19c an embodiment is shown in which the distances between the housing 1 and the gate 3 are different from each other. However, except in the eight areas E located in the eight corners, and except in the eight areas I located in the eight inside corners, each distance is within the claimed area.

Based on Fig. 20 the housing cross-sectional portions I-IV are explained. In Fig. 20 For the sake of clarity, only four juxtaposed scenes 3 are shown in the housing 1.

In the illustrated embodiment, both the outer dimensions of each slide 3 and the walls of the housing 1 are parallel. Thus, the free spaces 10 along the flow around the longitudinal extent of each backdrop 3, d. H. seen in the flow direction 4, consistent.

Since four scenes 3 are arranged in the housing 1, the housing cross-section has a corresponding number, namely four, theoretical housing cross-sectional portions I-IV. Each of these four housing cross-sectional portions I-IV is formed in the present case by two adjacent walls of the housing 1 and by two virtual boundaries G. The latter are therefore shown only by dashed lines.

In the illustrated case, each link 3 obstructs between 84% and 88% of the relevant housing cross-sectional subarea I or II or III or IV, respectively, relative to its associated housing cross-sectional portion I or II or III or IV.

Claims (17)

Ventilation component, comprising a channel-shaped housing (1) of preferably rectangular or square cross-section, wherein in the housing (1) at least one radial fan (2) and at least one silencer for flowing gases are provided, in particular at least one, preferably each, muffler in Flow direction (4) seen behind the centrifugal fan (2) is arranged and at least one filled with an absorbent material gate (3), characterized in that in each case a radial fan (2) associated gate (3) the area between the outer dimensions of the scenery ( 3) in the flow direction (4) is at least partially filled, that each link (3) is arranged at a distance to the next adjacent component and thus each link (3) is surrounded on all sides by a circumferential space (10) for flowing the gas , so that each link (3) can be flowed around on all sides by the flowing gas, wherein the Geh a cross section corresponding to the number of provided in a region of the housing cross-sections scenes (3) corresponding theoretical housing cross-sectional portions I or II or III or IV, each link (3) based on their zugbehigen housing cross-sectional portion I or II or III or IV between 55% and 90%, preferably between 64% and 81%, of the theoretically free flow cross-section of the housing cross-sectional portion I or II or III or IV blocked. Ventilation component according to the preceding claim, characterized in that at least one link (3) in its associated housing cross-sectional portion I or II or III or IV is arranged centered in a first direction and / or a second direction orthogonal to the first direction. Ventilation component according to one of the preceding claims, characterized in that at least one, in particular each, centrifugal fan (2) is assigned in each case a single, block-like design backdrop (3), in particular in the form of a cuboid. Ventilation component according to one of the preceding claims, characterized in that the dimensions remain constant in at least one link (3) in the flow direction (4) and thus the width of the free space (10) in the flow direction (4) is constant. Ventilation component decreases saw according to any one of the preceding claims, characterized in that seen the dimensions in at least one slot (3) in the flow direction (4), in particular step-like, a larger and thus the width of the free space (10) in the flow direction (4). Ventilation component according to one of the preceding claims, characterized in that the dimensions decrease seen at least one link (3) in the flow direction (4) and thus increases the width of the free space (10) seen in the flow direction (4) increases. Ventilation component according to the preceding claim, characterized in that the dimensions at least a backdrop (3) seen in the flow direction (4) discontinuously, in particular step-like, reduce and thus increases the width of the free space (10) seen in the flow direction (4) increases. Ventilation component according to one of claims 6 or 7, characterized in that the dimensions in at least one slide (3) seen in the flow direction (4) reduce in particular continuously and thus increases the width of the free space (10) seen in the flow direction (4) increases. Ventilation component according to one of the preceding claims, characterized in that at least one radial fan (2), preferably each radial fan (2), at least two, in particular parallel to each other, arranged, between them a flow channel forming scenes (3) are assigned. Ventilation component according to one of the preceding claims, characterized in that at least one link (3) on the centrifugal fan (2) facing the inflow side a recess (12) for receiving a part of the centrifugal fan (2), in particular of the drive motor (5). Ventilation component according to one of the preceding claims, characterized in that at least one link (3) has a quadrangular, in particular rectangular, cross section with four, in particular parallel to the housing (1) aligned outer sides. Ventilation component according to one of the preceding claims, characterized in that at least one backdrop (3) the transitional area of two adjacent outer sides is touched or rounded. Ventilation component according to one of the preceding claims, characterized in that upstream of the centrifugal fan (2) or the centrifugal fans (2) seen in the flow direction (4), a diaphragm (6) is arranged, the at least one opening (7), in particular for each centrifugal fan (2) each having an associated opening (7), for the passage of the flowing gas to the intake of the radial fan (2) and the centrifugal fans (2). Ventilation component according to one of the preceding claims, characterized in that in the region of at least one link (3) and preferably also in the, the backdrop (3) in the flow direction (4) seen upstream region on the inside of the walls of the housing (1) at least a circumferential, preferably directly on the walls of the housing (1) provided sound insulation and / or sound damping material (13) is provided. Ventilation component according to one of the preceding claims, characterized in that in the housing (1) at least two juxtaposed and / or superposed arrangements comprising a radial fan (2) and a muffler are provided with a filled with an absorbent material backdrop (3). Ventilation component according to one of the preceding claims, characterized in that at least one link (3) is arranged in the housing (1) such that the link (3) is at a distance from the adjacent inner wall of the housing (1), in particular each 5 to 10% of the corresponding inner dimension of the housing (1). Ventilation component according to one of the preceding claims, characterized in that at least one link (3) is arranged in the housing (1) such that the link (3) is at a distance from the boundaries G of its housing cross-sectional portion I or II or III or IV, in particular each 5 to 10% of the corresponding dimension of the housing cross-sectional portion I or II or III or IV.

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