EP2626644B1 - Ventilation component comprising a channel-shaped housing with surrounding coverings - Google Patents

Description

The invention relates to a ventilation component, comprising a channel-shaped housing with peripherally arranged housing walls, wherein in the housing at least one fan, in particular a centrifugal fan, and a fan seen in the flow direction upstream diaphragm are arranged, wherein the aperture an opening for the passage of the flowing medium Having the intake of the fan.

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.

In a known ventilation component for silencing on the upstream side of a slotted silencer with several used side by side backdrops. Two adjacent scenes form between each a flow channel. The scenes work on the principle of absorption 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.

With a shorter distance between the downstream side of the slotted silencer and the inflow side of the aperture, the suction power of the fan is reduced. Therefore, in a known ventilation component usually the slotted silencer is mounted so that the distance between the diaphragm and the downstream side of the slotted silencer is at least half the diameter of the impeller. However, this requires on the one hand a high housing length and on the other hand a higher sound power, which is not desirable.

From the US PS 5,326,317 is a fan for mounting in a false ceiling known. The FR 2 505 416 describes a fan for the transport of dust-laden air, such. B. tunnel air. In the US 2011/0002775 A1 is a fan for mounting in a false ceiling described. The GB 2 362 926 A discloses a ventilation component having the features of the preamble of claim 1.

The object of the invention is to avoid the aforementioned disadvantages and to provide a ventilation component, which has a lower sound power.

This object is achieved by a ventilation component with the features of claim 1. Preferred embodiments are defined in the dependent claims.

The inventive design is the

Soundproofing improved in the channel-shaped housing. Furthermore, under certain circumstances, an improved sound insulation can be achieved.

The sound-deadening and / or sound-damping material may, for example, be an absorption material or another suitable material. The housing preferably has a rectangular or square cross-section. The material may extend over the entire length or only over a portion of the diaphragm in the flow direction upstream housing walls.

In the preferably centrally arranged flow channel, the flow is accelerated before the orifice to the speed level in the region of the opening provided in the orifice (orifice flow). If, for example, the cross section of the flow channel decreases steadily in the flow direction, the flow in the flow channel is steadily accelerated. Thus, the fan can work more effectively, so that the efficiency of the fan is increased. In addition, the sound insulation and / or sound damping material can be installed in a very little to no distance to the upstream side of the panel. In the latter case, the outflow side of the sound insulation and / or sound damping material is applied to the inflow side of the diaphragm. This reduces the sound power. The ventilation component according to the invention comes with at least the same high sound attenuation and / or sound insulation to a lower pressure loss compared to known ventilation components.

At least one sound-damping and / or sound-damping material may have at least one inner surface delimiting the flow channel and an outer surface facing the inner side of the housing and / or the adjacent sound-deadening and / or sound-damping material, and the outer surface of this sound-deadening and / or sound-deadening material may be on the inner side of the housing and / or directly - or indirectly via another component, such as an intermediate wall - abut the adjacent sound insulation and / or sound damping material or forming a gap s from the inside of the housing and / or from the adjacent Schalldämm- and / or Soundproofing material or the other component to be spaced.

The downstream end of at least one sound-absorbing and / or sound-damping material is applied directly to the inflow side of the diaphragm or is spaced to form a gap a from the inflow side of the diaphragm. In a direct arrangement, the ventilation component has a particularly short housing length, so that the ventilation component according to the invention can also be used in small spaces.

If a gap a is provided, the width of the gap a can be up to 40% of the material thickness of the element in the region of the downstream side, i. at the downstream end of the flow channel, amount.

The cross-section of at least one sound-damping and / or sound-damping material may be formed as a circumferentially one-piece element. Such an element is pushed into the housing through the free end of the housing.

Of course, it is also possible that the cross-section of at least one sound-damping and / or sound-damping material consists of at least two, preferably four, sub-elements. If the housing has, for example, a quadrangular cross-section, the individual elements can be bevelled on the edge side by 45 °. When inserted, the four sub-elements form a circumferential closed ring-like element. Of course, other configurations are possible. Thus, for example, two sub-elements can be used, which have the shape of an "L" or a "U". Of course, adjacent elements can also butt against each other.

The width of the gap s may be approximately between 1/10 and 1/5 of the material thickness of an element in the region of the downstream side, i. at the downstream end of the flow channel, amount. Thus, conventional scenes can be adapted to any housing size and / or to all conventional apertures. Also, a further improvement of the sound attenuation can be achieved by resonance effects. For example, if the material thickness of the gate is 200 mm, the width of the gap s is preferably between 20 mm and 40 mm.

At least one element or at least one subelement may include absorption material in the region of the inner surface. But it is also quite possible that the element or the sub-element consists entirely of absorption material.

At least two opposite, between the flow channel forming inner surfaces may be aligned in parallel.

The cross-section of at least one flow channel decreases in the flow direction, in particular continuously.

The cross-section of at least one flow channel may be quadrangular at least in the region of the inflow side, preferably over the entire length between the inflow side and the outflow side.

Alternatively, the cross-section of at least one flow channel may be quadrangular at least in the area of the outflow side, preferably over the entire length between the inflow side and the outflow side.

However, it is also quite possible that the cross section of at least one flow channel, viewed in the direction of flow, changes from a quadrangular cross section in the region of the inflow side into a round cross section in the region of the outflow side.

Preferably, a funnel-shaped inlet, in particular funnel-shaped in the flow direction, inlet nozzle is provided between the downstream side of the diaphragm and the fan.

In a preferred embodiment of the invention, the narrowest point of the cross-section of at least one flow channel in the region of the downstream side is not smaller than the inlet diameter of the inlet nozzle.

It is also quite possible that the narrowest point of the cross section of at least one flow channel in the region of the downstream side is not smaller than the diameter of the opening in the diaphragm.

Preferably, the edge of the narrowest point of the cross section of at least one flow channel adjoins in the region of the downstream side directly to the edge of the opening in the aperture or the inlet diameter of the inlet nozzle and lies in particular on the edge of the opening.

The sound-deadening and / or sound-deadening material may have a round or bevelled transition (transitional area) to the inner surface on the inflow side in order to further reduce the pressure loss.

It is advisable if the upstream edge of the opening in the aperture is rounded or bevelled.

It is advisable if in the housing at least two side by side and / or superposed arrangements are each provided comprising a fan and sound insulation and / or sound damping material, each Schalldämm- and / or Schalldämpfungsmaterial circumferentially to form at least one, in particular central, flow channel is formed and wherein each sound insulation and / or sound damping material is provided in the upstream of the aperture in the flow direction of the housing walls.

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.

In this case, all fans can be assigned a common, consisting of sound insulation and / or sound damping material, circumferentially formed one-piece element. In this case, the one-piece element has a plurality of flow channels.

But it is also possible that each fan is assigned a separate from Schalldämm- and / or Schalldämpfungsmaterial existing circumferentially formed one-piece element.

Between two adjacent one-piece elements, at least one, preferably located with the inside of at least one housing wall in contact, intermediate wall can be provided. Each intermediate wall divides the housing into two areas. Each area serves to receive a one-piece element. Furthermore, the stability of the housing is increased by the intermediate wall.

Fig. 1

eine Seitenansicht auf ein erfindungsgemäßes Lüftungsbauteil,

Fig. 2

eine Sicht in Strömungsrichtung gesehen in das Innere eines ersten Ausführungsbeispiels eines erfindungsgemäßen Lüftungsbauteils,

Fig. 3

eine Sicht in Strömungsrichtung gesehen in das Innere eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Lüftungsbauteils,

Fig. 4

eine Sicht in Strömungsrichtung gesehen in das Innere eines dritten Ausführungsbeispiels eines erfindungsgemäßen Lüftungsbauteils,

Fig. 5

eine Sicht in Strömungsrichtung gesehen in das Innere eines vierten Ausführungsbeispiels eines erfindungsgemäßen Lüftungsbauteils,

Fig. 6

eine Sicht in Strömungsrichtung gesehen in das Innere eines fünften Ausführungsbeispiels eines erfindungsgemäßen Lüftungsbauteils mit einem umlaufenden Spalt s,

Fig. 7

einen Schnitt durch den Gegenstand nach Fig. 2,

Fig. 8

einen Schnitt durch den Gegenstand nach Fig. 3,

Fig. 9

einen Schnitt durch einer der Gegenstände nach den Fig. 4 oder 5,

Fig. 10

das Detail "X" in Fig. 9 mit dem Spalt s,

Fig. 11

das Detail "X" in Fig. 9 ohne den Spalt s,

Fig. 12

das Detail "Z" eines Ausführungsbeispiels nach Fig. 9 mit einem Spalt a,

Fig. 13

ein erfindungsgemäßes Lüftungsbauteil mit insgesamt vier Ventilatoren (je zwei Ventilatoren übereinander und nebeneinander angeordnet), wobei allen Ventilatoren ein gemeinsames, aus Schalldämm- und/oder Schalldämpfungsmaterial bestehendes, umlaufend ausgebildetes einteiliges Element zugeordnet ist,

Fig. 14

eine alternative Ausgestaltung des Gegenstandes nach Fig. 13, wobei jedem Ventilator ein separates aus Schalldämm- und/oder Schalldämpfungsmaterial bestehendes umlaufend ausgebildetes einteiliges Element zugeordnet ist, und

Fig. 15

eine alternative Ausgestaltung des Gegenstandes nach Fig. 14.

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

Fig. 1

a side view of an inventive ventilation component,

Fig. 2

a view in the direction of flow into the interior of a first embodiment of a ventilation component according to the invention,

Fig. 3

a view in the direction of flow in the interior of a second embodiment of a ventilation component according to the invention,

Fig. 4

a view in the direction of flow in the interior of a third embodiment of a ventilation component according to the invention,

Fig. 5

a view in the direction of flow into the interior of a fourth embodiment of a ventilation component according to the invention,

Fig. 6

a view in the direction of flow in the interior of a fifth embodiment of a ventilation component according to the invention with a circumferential gap s,

Fig. 7

a section through the object after Fig. 2 .

Fig. 8

a section through the object after Fig. 3 .

Fig. 9

a section through one of the objects after the Fig. 4 or 5 .

Fig. 10

the detail "X" in Fig. 9 with the gap s,

Fig. 11

the detail "X" in Fig. 9 without the gap s,

Fig. 12

the detail "Z" of an embodiment after Fig. 9 with a gap a,

Fig. 13

a ventilation component according to the invention with a total of four fans (two fans on top of each other and arranged side by side), with all fans a common, from sound insulation and / or sound damping material existing, circumferentially trained one-piece element is assigned,

Fig. 14

an alternative embodiment of the subject to Fig. 13 , wherein each fan is assigned a separate consisting of sound insulation and / or Schalldämpfungsmaterial circumferentially formed one-piece element, and

Fig. 15

an alternative embodiment of the subject to Fig. 14 ,

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

In FIG. 1 is a side view of an inventive ventilation component shown, which has a rectangular channel-shaped housing with four circumferential housing walls 1. In the ventilation component, a fan 2 is provided, which is driven by a motor 3. The fan 2 is, viewed in the flow direction 4, disposed upstream of a diaphragm 5.

The fan 2 and the motor 3 are on the underside of a base 16 which is fastened by means of fastening elements 19, such as screws, on the inside of the housing walls 1.

Between the fan 2 and the diaphragm 5, an inlet nozzle 12 is arranged in the illustrated embodiments. The outer edge of the inlet nozzle 12 is sealed by a seal, not shown, with respect to the diaphragm 5. The aperture 5 has an opening 6 for the passage of the flowing medium through the inlet nozzle 12 to the intake of the fan 2.

Like, for example Fig. 1 can be seen, the panel 5 is attached via two approximately triangular-shaped support members 17 on the base 16. On each side of the inlet nozzle 12 is a support member 17. The lower edge portion 18 and the standing with the panel 5 in contact edge region 13 of each support member 17 are formed bent.

As can be seen from the drawings, the flow cross section of the inlet nozzle 12 tapers in the direction of flow 4 in the manner of a funnel. In the exemplary embodiment illustrated, the inlet nozzle 12 has two peripheral regions 14 and 15, arranged one behind the other in the flow direction 4, which differ from each other in their radius of curvature.

Seen upstream in the flow direction 4, the diaphragm 5 is a soundproofing and / or sound damping material 7 for sound insulation and / or for soundproofing. The soundproofing and / or sound damping material 7 may be made of rock wool, for example. 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 soundproofing and / or sound damping material 7, for example, a perforated plate.

In the embodiments of the Fig. 1 to 11 is the sound insulation and / or sound damping material 7 directly with the upstream side of the diaphragm 5 in contact. The sound-absorbing and / or sound-damping material 7 leaves in the illustrated Embodiments a central flow channel 8 free. The soundproofing and / or sound damping material 7 extends almost over the entire length of the housing walls 1, which are the upstream of the aperture 5 seen in the flow direction 4.

Under the upstream side A of the sound-absorbing and / or sound-damping material 7, the end is understood that opposite to the flow direction 4 is directed. The downstream side is the end facing in the flow direction 4, which is in contact with the diaphragm 5.

According to the embodiment Fig. 4 the cross-section of the sound insulation and / or sound damping material 7 is formed as a circumferentially one-piece element.

As Fig. 1 can be seen, two recesses are provided in the front wall in this figure, which can be closed with doors not shown. Through these recesses, the fan 2 and the sound damping material 7 is accessible from the outside.

In the FIGS. 2 and 3 and FIGS. 5 and 6 show other embodiments. Here, the cross section of the sound insulation and / or sound damping material 7 is formed from four sub-elements.

In the embodiments of the FIGS. 2 and 3 the opposite longitudinal edges of each sub-element are beveled at a 45 ° angle, so that in the inserted state, the sub-elements form a circumferential and closed formed ring-like element.

In the embodiments of the FIGS. 5 and 6 again four sub-elements are provided. However, adjacent sub-elements butt against each other.

In the embodiments of the FIGS. 4 to 6 are - as well as in FIG. 9 shown - the two opposite, between the flow channel 8 forming inner surfaces 9, aligned in parallel. Thus, the cross section of the flow channel 8 over its entire length - with the exception in the rounded transition region 11 in the region of the inflow side A - constant. In the embodiments of the FIGS. 4 and 5 is the sound insulation and / or sound damping material 7 with its outer surfaces 10 in direct contact with the inside of the housing walls first

In the embodiments of the FIGS. 2 and 3 decreases - as well as in the FIGS. 7 and 8th shown - the cross section of the flow channel 8, except in the rounded transition region 11 in the region of the inflow side A in the flow direction 4 seen continuously.

In all embodiments, the sound damping and / or sound damping material 7 in the region of the inflow side A a rounded transition region 11 in order to reduce pressure losses.

Like that FIGS. 2 to 6 12, the narrowest point of the cross section of the flow channel 8 in the region of the downstream side is greater than the inlet diameter 16 of the inlet nozzle 12.

In the embodiments of the FIGS. 3 and 4 the cross section of the flow channel 8 is quadrangular in each case in the region of the inflow side A and the outflow side.

According to the embodiment Fig. 2 If the cross-section of the flow channel 8 in the flow direction 4 transitions from a quadrangular cross-section in the region of the inflow side A into a round cross-section in the region of the outflow side.

In the FIGS. 6 and 10 a variant is shown in which the outer surface 10 of the sound-absorbing and / or sound-damping material 7 is spaced apart from the inside of the adjacent housing wall 1 to form a gap s.

In Fig. 12 an embodiment is shown in which the sound insulation and / or the sound damping material 7 is not directly in contact with the upstream side of the aperture 5. Rather, the sound insulation and / or the sound damping material 7 is spaced by a gap a from the upstream side of the panel 5. The aperture 5 extends over the entire cross section of the housing.

As Fig. 12 can also be seen, the aperture 5 with its downstream side sealingly in contact with the outer peripheral edge of the inlet nozzle 12. The inlet nozzle 12 may be screwed, riveted or the like, for example, at its free edge with the panel 5.

It is of course also possible that the inlet nozzle 12 and the aperture 5 are integrally formed. In In this case, the edge of the inlet nozzle 12 would extend to the housing walls 1.

Fig. 12 clarifies again that the narrowest point of the cross section of the flow channel 8 in the region of the downstream side is greater than the inlet diameter 16 of the inlet nozzle 12th

In the Fig. 13 to 15 a ventilation component is shown, which has a channel-shaped housing with peripherally arranged housing walls 1. In the housing four seen in the flow direction 4 at the same height, juxtaposed and superposed fans 2 are provided. For this purpose, four openings 6 are provided for the passage of the gas to the intake of the respective fan 2 in the aperture 5. The direction of rotation of the four fans 2 is the same.

According to the embodiment Fig. 13 All four fans 2 a common sound insulation and / or sound damping material 7 is assigned as a one-piece element. The sound damping and / or sound damping material 7 therefore forms four flow channels 8. With its four sides, the sound insulation and / or sound damping material 7 directly adjoins the housing walls 1.

In the embodiments of the Fig. 14 and 15 each fan 2 is a separate and thus separate from sound insulation and / or sound damping material 7 existing circumferentially formed one-piece element assigned. Each sound damping and / or sound damping material 7 forms a flow channel 8.

According to the embodiment Fig. 14 the housing has on the inside two perpendicular to each other and located with the inside of opposite housing walls 1 in contact intermediate walls 20, which divide the housing into four areas. Each area serves to receive a sound damping and / or sound damping material (7), which is designed as a circumferential one-piece element.

In the embodiments of the Fig. 14 and 15 Each soundproofing and / or sound damping material 7 directly adjoins the housing walls 1 with two of its four sides.

The other two sides of each element are in the embodiment after Fig. 14 with the respective adjacent partition 20 in contact.

As in the embodiment according to Fig. 15 no intermediate walls 20 are provided, each element with its two other sides with one side of an adjacent element in contact.

Claims (18)

1. Ventilation component, comprising a channel-shaped housing, with housing walls (1) arranged such as to surround it, wherein at least one ventilator (2), in particular a radial ventilator (2) is provided in the housing, and, for the purpose of soundproofing and/or for sound-damping in the region of the housing walls (1) upstream of the ventilator (2), seen in the direction of flow (4), soundproofing or sound-damping material (7) is provided, which leaves free at least one circumferential flow channel (8), which is provided preferably directly at the housing walls (1), preferably in the centre, characterised in that, also arranged in the housing is a panel (5), upstream of the ventilator (2) seen in the direction of flow (4), wherein the panel (5) comprises an opening (6) for the passage of the flowing medium to the suction region of the ventilator (2), that the downstream-side end of at least one soundproofing and/or sound-damping material (7) is in contact at the flow approach side of the panel (5), or, with the formation of a gap (a), is arranged at a distance from the flow approach side of the panel (5), and that the cross-section of at least flow channel (8) is reduced, preferentially continuously, seen in the direction of flow (4).
2. Ventilation component in accordance with the preceding claim, characterised in that at least one soundproofing and/or sound-damping material (7) comprises at least one inner surface (9) delimiting the flow channel (8), and an outer surface (10) facing towards the inner side of the housing and/or the adjacent soundproofing and/or sound-damping material (7), and the outer surface (10) of the soundproofing and/or sound-damping material (7) is in contact with the inner side of the housing and/or with the adjacent soundproofing and/or sound-damping material (7), or, with the formation of a gap s, is arranged at a distance from the inner side of the housing and/or from the adjacent soundproofing and/or sound-damping material (7).
3. Ventilation component in accordance with any one of the preceding claims, characterised in that the cross-section of at least one soundproofing and/or sound-damping material (7) is configured as a circumferential single-piece element.
4. Ventilation component in accordance with any one of the preceding claims 1 to 3, characterised in that the cross-section of at least one soundproofing and/or sound-damping material (7) consists of at least two, preferably four, part elements.
5. Ventilation component in accordance with any one of the preceding claims 2 to 4, characterised in that the width of the gap s amounts to approximately 1/10 and 1/5 of the material thickness of an element.
6. Ventilation component in accordance with any one of the preceding claims 3 to 5, characterised in that at least one element or at least one part element in the region of the inner surface (9) contains absorption material.
7. Ventilation component in accordance with any one of the preceding claims, characterised in that at least two opposed inner surfaces (9) forming the flow channel (8) are aligned parallel.
8. Ventilation component in accordance with any one of the preceding claims, characterised in that the cross-section of at least one flow channel (8) is configured as rectangular at least in the region of the flow approach side A, and preferably on the whole length between the flow approach side A and the flow departure side.
9. Ventilation component in accordance with any one of the preceding claims 1 to 7, characterised in that the cross-section of at least one flow channel (8) is configured as rectangular at least in the region of the flow departure side, and preferably on the whole length between the flow approach side A and the flow departure side.
10. Ventilation component in accordance with any one of the preceding claims, characterised in that the cross-section of at least one flow channel (8), seen in the flow direction (4), transitions from a rectangular cross-section in the region of the flow approach side A to a circular cross-section in the region of the flow departure side.
11. Ventilation component in accordance with any one of the preceding claims, characterised in that, provided between the flow departure side of the panel (5) and the ventilator (2), is an inlet nozzle (12), running into a funnel shape, in particular seen in the flow direction (4).
12. Ventilation component in accordance with the preceding claim, characterised in that the narrowest point of the cross-section of at least one flow channel (8) in the region of the flow departure side is not smaller than the inlet diameter (16) of the inlet nozzle (12).
13. Ventilation component in accordance with any one of the preceding claims, characterised in that the narrowest point of the cross-section of at least one flow channel (8) in the region of the flow departure side is not smaller than the diameter of the opening (6) in the panel (5).
14. Ventilation component in accordance with claim 12 or 13, characterised in that the edge of the narrowest point of the cross-section of at least one flow channel (8), in the region of the flow departure side, connects directly to the edge of the opening (6) in the panel (5) or the inlet diameter (16) of the inlet nozzle (12), and, in particular lies on this.
15. Ventilation component in accordance with any one of the preceding claims, characterised in that the soundproofing and/or sound-damping material (7) on the flow approach side comprises a circular or oblique transition to the inner surface (9).
16. Ventilation component in accordance with any one of the preceding claims, characterised in that the flow approach side edge of the opening (6) in the panel (5) is configured as rounded or oblique.
17. Ventilation component in accordance with any one of the preceding claims, characterised in that at least two arrangements are provided in the housing, arranged next to one another and/or above one another, in each case comprising a ventilator (2) and soundproofing and/or sound-damping material, wherein each soundproofing and/or sound-damping material (7) is configured as circumferential, with the formation of at least one flow channel (8), in particular central, and wherein each soundproofing and/or sound-damping material (7) is provided in the region of the housing walls (1) upstream of the panel (5), seen in the direction of flow (4).
18. Ventilation component in accordance with the preceding claim, inasmuch as it reverts back to claim 3, characterised in that, provided between two adjacent single-piece elements, is at least one intermediate wall (20), preferably in contact with the inner side of at least one housing wall (1).

Images