DE102016102383A1 - Air guiding device - Google Patents

Abstract

An air guiding device (1) has a housing body (2) with at least one air inlet (4) and at least one air outlet (5), which are interconnected by at least one air duct (6), and at least one introduced into the housing body (2) Sound outlet (7) at least one air duct (6), wherein the housing body (2) on the outside with at least one Schalldämmkörper (3) is occupied, the at least one sound outlet (7) covers the entire surface. A vehicle has at least one air guiding device (1). The invention is particularly applicable to motor vehicles, in particular for the routing of air from air conditioning units.

Description

The invention relates to an air guiding device, comprising a housing body with at least one air duct. The invention also relates to a vehicle having at least one such air guiding device. The invention is particularly applicable to motor vehicles, in particular for the routing of air from air conditioning units.

A suppression of noise in vehicles, especially in electric cars, is becoming increasingly important. For noise suppression in air ducts sound-absorbing acoustic pads are currently mounted in their air ducts. This results in the disadvantage that there is a reduction of the air volume or the throughput volume.

DE 38 30 346 A1 discloses a sound-absorbing air guide member made of a tubular, corrugated, flexible base member and associated with this Schallschluckmaterial. The sound-absorbing material is preferably an open-pored foam of polymeric material. The corrugated primitive has peripheral perforations in its outwardly directed corrugation tips at a defined distance from each other.

On the outer circumference of the base member a mat of the sound absorption material is mounted. Between the mat and the troughs of the base element at least one receiving chamber for the sound waves is formed. As a result, air can escape from the base element through the peripheral perforations past the sound-absorbing material into the at least one receiving chamber. The sound absorption material does not cover the perimeter perforations over the entire surface, but only vaulted over them.

DE 35 36 379 A1 discloses an air duct, especially in motor vehicles, with sound-absorbing materials, which is designed for ease of manufacture and better sound attenuation so that the air duct at least longitudinally self-supporting exclusively of sound-absorbing material, in particular polyurethane-flock composite foam exists.

It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a particularly compact possibility for sound damping, which has no appreciable influence on an air flow volume.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by an air guiding device having a housing body with at least one air duct and at least one opening introduced into the housing body (hereinafter also referred to as "sound outlet opening" without limitation of generality) of at least one air duct, wherein the housing body is covered on the outside with at least one soundproofing body is that covers at least one sound outlet opening over the entire surface.

As a result, the advantage is achieved that penetrating through the air inlet into the air duct sound waves are not passed virtually unattenuated through the air duct, but at least partially meet at the at least one sound outlet on the sound or sound absorption body and attenuated by this, in particular absorbed. The housing body thus also serves the sound attenuation or sound insulation. In this case, a flow cross section of the air duct is not or not significantly reduced. The Schalldämmkörper thus exerts no or no appreciable effect on the air flow rate or air flow through the at least one air duct. Also, the sound insulation can be achieved in a particularly compact manner, so that a space influence is low. In addition, such an air guide device is inexpensive to implement. In addition, in contrast to a completely made of sound insulation material housing body continues to achieve a high structural stability.

The air guide device may also be referred to as an air guide, air guide member, air duct, etc.

The air guiding device is provided and arranged to guide air, in particular breathing air. In particular, it is not intended to carry exhaust gases and / or hot gases.

So that the sound emerging from the sound outlet openings can not propagate away from the air guiding device, the sound outlet opening is completely covered over. In particular, there is therefore no path for sound waves which leads out of the sound outlet opening and past the sound insulation body. Therefore, this type of sound attenuation is fundamentally suitable for arbitrarily shaped housing bodies, in particular also those housing bodies in which the at least one sound outlet opening is incorporated in a smooth (for example flat or slightly curved) surface of the housing body.

The at least one air duct has at least one associated air inlet (also denoted as "air inlet opening") and at least one associated air outlet (also denoted as "air outlet opening"). The air inlet and the air outlet are thus connected to one another by at least one air duct. These openings provided for the passage of air are different openings from the at least one sound outlet opening. The air duct is formed by a cavity of the housing body or corresponds to a cavity of the housing body. The housing body thus forms the wall of the air duct.

The sound outlet opening in particular connects an air duct to an outer side of the housing body and is introduced into a region of the housing body which forms a wall of the air duct.

The housing body is in particular a plastic part and may be formed, for example, as an injection-molded part, a blown or blown body, as an integral foam or molded foam or mucilage (physically and chemically foamed) or by means of similar processes. The housing body may also consist of metal, ceramic, fiber composite material, etc.

It is a particularly advantageous embodiment that the housing body is a chemically foamed blow body, that is, that the housing body has been blown by means of a chemical blowing agent. This gives the advantage that the body is porous, e.g. with a pore content between 5% and 30%. The main body may be closed-pored or open-pored. This results in the advantage that the basic body itself can be made sound-absorbing with particularly simple means. The associated sound absorption can already be so effective that the at least one sound outlet opening and the at least one sound-absorbing body can be dispensed with. Consequently, the air guiding device can also consist only of the chemically foamed blow body.

In general, the main body can be sound-absorbing or non-sound-absorbing ("sound-neutral").

The trained as breakthroughs Schallauslassöffnungen can be subsequently produced by punching, laser cutting, milling, sawing, cutting and so on. The breakthroughs can be generated in particular by tool-dropping methods. The at least one sound outlet opening may already have been made with the housing body, e.g. by a correspondingly designed injection mold.

In order to achieve a particularly compact design, the sound-absorbing body may be formed as a mat, layer or film.

The material of the Schalldämmkörpers may consist of needle felt, mesh material, viscose staple, porous foam or similar materials. Also biologically produced felts and wool or silk can be used. The Schalldämmkörper can also be made of a mixed component -. B. plastic with an insulating component - exist.

It is an embodiment that the Schalldämmkörper protrudes into at least one of them covered sound outlet. The soundproofing body can protrude into the at least one sound outlet opening or, in one variant, even protrude through the sound outlet opening and thereby project slightly (i.e., without a noticeable reduction in the flow cross section) into the air guide channel. Thus, a particularly effective sound attenuation can also be achieved if a volume increase caused by the at least one sound-insulating body is to be kept particularly low.

It is still an embodiment that at least one sound-absorbing body is an open-pored Schalldämmkörper. Open-pored Schalldämmkörper usually have a slightly better soundproofing than closed-pore Schalldämmkörper. In addition, a variety of usable open-pored Schalldämmkörpern is particularly high. The advantage of closed-pored Schalldämmkörper lies in a higher airtightness.

In general, the lower its density, the more effectively a sound-absorbing body can dampen sound. Consequently, it is advantageous if the sound-absorbing body has a noticeably lower density than the base body, in particular a density which is at least 25% lower, in particular a density which is at least 50% lower. However, the Schalldämmkörper can also be a non-porous body.

It is yet another embodiment that at least one sound outlet opening is a rounded sound outlet opening. As a result, a long-term stability of the housing body is particularly effectively supported. Thus, it is exploited that cracks generated by mechanical stress (e.g., vibration) tend to occur in the area of sharp edges or corners, which is avoided by the rounded sound outlet (s). Rounded Schallauslassöffnungen can be, for example, circular or oval holes, slots with rounded ends, shapes with angular basic shape, but rounded corners, etc.

It is also an embodiment that at least one sound-absorbing body is pressed against a large area of the main body. This allows - even with frequent and / or violent - movements of the air ducting a support of the Schalldämmkörpers remain guaranteed on the body and consequently an air path to the sound insulation past (eg between the Schalldämmkörper and the body) are particularly reliably prevented. In addition, installation-related distortions of the Schalldämmkörpers can be compensated or corrected.

A large-area pressing may in particular be understood to mean pressing outside the at least one sound outlet opening with at least 75% of the available area, in particular with at least 90% of the available area, in particular with practically 100% of the available area (FIG. full-surface pressing).

It is a further embodiment that the air guiding device has at least one holding device for fixing at least one sound-absorbing body to the base body. This results in the advantage that the sound-absorbing body can be attached in a particularly targeted manner to the base body, in particular also on a freestanding base body. In addition, in particular, the use of a holding device also allows a simple solution of the sound-absorbing body of the main body. The holding element may be a separate holding device or be fixedly attached to the base body.

Examples of a holding device include screwing devices, clips, hooks, rubber bands, straps, clamping slots, etc.

Alternatively or additionally, at least one sound-absorbing body may be hung, glued, welded (e.g., ultrasonically welded), hot-laid, clamped, crimped, etc., for attachment or fixation to the body. Sticking can be achieved particularly easily by means of at least one double-sided adhesive tape.

It is a particularly advantageous embodiment that at least one holding device is a hose-like holding device. Due to the tubular or tubular configuration of the sound-absorbing body can be pressed in a simple manner over a large area and evenly to the body. It can enclose the base body in particular in the circumferential direction.

It is still an embodiment that at least one holding device is a shrink tube. The use of a shrink tube has the advantage that the Schalldämmköper over a large area is particularly firmly attached to the body, in particular it can be pressed. In addition, a structural stabilization of the main body can be achieved by means of a heat-shrinkable tube, which possibly can be weakened by the introduction of the at least one sound outlet opening.

It is a development that at least one shrink tube has no breakthrough. For example, the heat shrink tubing can be also be used as an air-impermeable cover. Alternatively, the shrink tubing may have at least one aperture (e.g., at least one hole, particularly at least one approximately circular hole).

It is an alternative or additional embodiment that at least one holding device is an elastic hose network. The use of a hose network has the advantage that it does not need to be aftertreated in order to fix the sound-absorbing body to the base body, in particular to press it. The hose net can be, for example, mesh-formed or produced in plastic or injection-molded.

It is yet another embodiment that at least one sound-absorbing body is covered airtight. This results in the advantage that an air exchange between the air duct and the environment of the air ducting device in a simple, inexpensive and compact manner can be prevented. The air-impermeable cover may, for example, be implemented by means of a barrier film, e.g. a plastic film. Alternatively or additionally, the sound-absorbing body may have an air-impermeable barrier film.

The object is also achieved by a vehicle having at least one air guiding device as described above. The use of the air guiding device can attenuate interfering noise entering there, so that, in particular, improved acoustics of an interior and / or an outside area of the vehicle can be achieved.

The vehicle may be a motor vehicle, in particular a passenger car, a truck or a bus. The vehicle may also be an aircraft, e.g. an airplane or a helicopter.

However, the air guiding device is not limited to vehicles, but can also be applied in the field of home automation (eg in air conditioning and ventilation systems) and industrial technology. The task is thus solved by a domestic plant or an industrial plant having at least one air guiding device as described above. In particular, the home automation system or the industrial plant may be a home automation air conditioning, a home automation ventilation system, an industrial technology air conditioning or industrial ventilation system.

It is a further development that the air guiding device is connected to a ventilation device in terms of ventilation. Thereby, a transmission of a noise generated by the air conditioner noise can be reduced in an interior of the vehicle. So it will be a suppression or even a virtual interruption of a noise flow from air conditioners in the air duct can be achieved. Consequently, an improved acoustics is achieved in the interior of the vehicle.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment which will be described in detail in conjunction with the drawings.

1 shows a plan view of a base body with a sound insulation body placed thereon for producing a spoiler device;

2 shows in plan view the spoiler, in addition to the components of 1 the sound-absorbing body is fixed to the base body by means of a holding device;

3 shows the spoiler 2 as a sectional view in front view; and

4 shows in plan view a further basic body with a sound insulation body placed thereon for producing an air guiding device.

1 shows in plan view a tubular body formed 2 with a mat or sheet-like sound insulation body placed thereon 3 for producing a spoiler device 1 of a vehicle F. The vehicle F may be, for example, a motor vehicle or an aircraft.

The main body 2 may be a chemically foamed blow body made of plastic, which itself is sound-absorbing or sound-absorbing.

The main body 2 has an air inlet at one end 4 and on its other end an air outlet 5 on. air intake 4 and air outlet 5 are through the hollow interior of the body 2 interconnected, which as an air duct 6 (see also 3 ) serves. The main body 2 is in particular a self-supporting plastic part, which has been produced for example by injection molding or blowing.

In the (side) wall of the main body 2 are several dashed sound outlet openings 7 present, the the air duct 6 with an outside of the main body 2 connect. The sound outlet openings 7 are formed here as a series of circular or oval holes.

The outside on the body 2 launched Schalldämmkörper 3 covers the sound outlet 7 over the entire surface, leaving no air between the body 2 and sound insulation 3 from the sound outlet 7 can escape. This is the Schalldämmkörper 3 so on that he has the sound outlet 7 surrounds completely circumferentially.

The sound insulation body 3 Here is an open-pored, mat-shaped or sheet-like body whose density is significantly lower than the density of the body 2 , The sound insulation body 3 For example, may consist of needle felt, rayon, open-cell foam or similar materials. Also - eg biologically produced - felts and wools or silks can be used. The sound insulation body 3 can also be a mixed component -. B. plastic with an insulating component - exist.

2 shows in top view the spoiler 1 in which the sound-absorbing body 3 additionally by means of a holding device in the form of a tubular shrink tube 8th on the body 2 is fixed. This is the shrink tube 8th over the main body 2 and the Schalldämmkörper 3 pulled and following, for example, by hot air treatment, shrunk. As a result, the shrink tube presses 8th the sound-absorbing body 3 large area of the body 2 ,

The shrink tube 8th can have openings 9 have, for example, here several round openings 9 , The number, size, shape and arrangement of the openings 9 may vary. So can the openings 9 also in a simple row along a longitudinal extent of the basic body 2 be arranged, be larger, etc. 3 shows the spoiler 1 as a sectional view in front view, ie in view of a sectional plane AA 2 , Because of the shrink tubing 8th the sound-absorbing body 3 large area of the body 2 can press, the material of the sound-absorbing body 3 in the sound outlet 7 extend into it and thus protrude there (and in a variant even through the sound outlet 7 through a small distance in the air duct 6 protrude, o. Fig.).

The at least one sound-absorbing body 3 Can also be covered impermeable to air, for example by means of an impermeable barrier film (o. Fig.). Such a barrier film can eg between the Schalldämmkörper 3 and the shrink tube 8th be arranged or the shrink tube 8th Cover on the outside. But the barrier film can also be part of the Schalldämmkörpers 3 represent. Another way, an air exchange between the air duct 6 and the environment of the spoiler 1 To prevent it is to use a shrink tube without openings.

An air guiding device used in the vehicle F 1 For example, it may be connected to an air conditioning unit (not shown) of the vehicle F in terms of ventilation technology. Sound waves generated by the air conditioner through the air duct 6 passed air are from the Schalldämmkörper 3 absorbs and thus achieves a noise attenuation.

4 shows in plan view another tubular body 10 with a sound insulation body placed thereon 3 for producing an air guiding device, eg analogously to the production of the air guiding device 1 ,

In contrast to the main body 2 indicates the basic body 10 a rectangular sound outlet 11 on. This has rounded corners to improve longevity under vibration loads.

Both the main body 2 as well as the basic body 10 can sound outlet 7 respectively. 11 at several points in the circumferential direction of the body 2 respectively. 10 have, for example, at opposite positions.

Of course, the present invention is not limited to the embodiment shown.

So the basic body may not only be tubular, but may have any other shape.

Also, instead of the shrink tubing, e.g. an elastic hose network can be used, which simply needs to be wound up to push the Schalldämmkörper on the body.

Furthermore, the spoiler device can dispense with a separate holding device, for example by the sound-absorbing body is glued to the base body. In the 1 and 4 shown components can then already show a finished spoiler. In addition, the Schalldämmkörper can be attached only locally to the body, for example by means of several screws, hooks or clips. The sound-absorbing body can thereby be held under tension.

Also, the spoiler device 1 Be part of a home appliance technology system or an industrial technology system.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

spoiler device

2

body

3

Schalldämmkörper

4

air intake

5

air outlet

6

air duct

7

sound outlet

8th

shrinkable tubing

9

Opening in the shrink tube

10

body

11

sound outlet

F

vehicle

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3830346 A1 [0003]
• DE 3536379 A1 [0005]

Claims (15)

Air guiding device ( 1 ), comprising - a housing body ( 2 ; 10 ) with at least one air duct ( 6 ) and - at least one in the housing body ( 2 ) introduced sound outlet opening ( 7 ; 11 ) at least one air duct ( 6 ), wherein - the housing body ( 2 ; 10 ) on the outside with at least one Schalldämmkörper ( 3 ) is occupied, the at least one sound outlet ( 7 ; 11 ) completely covered. Air guiding device ( 1 ) according to claim 1, wherein the sound-absorbing body ( 3 ) in at least one of them covered sound outlet ( 7 ; 11 protrudes. Air guiding device ( 1 ) according to one of the preceding claims, wherein at least one sound-absorbing body ( 3 ) an open-pored Schalldämmkörper ( 3 ). Air guiding device ( 1 ) according to one of the preceding claims, wherein at least one sound outlet opening ( 7 ; 11 ) a rounded sound outlet opening ( 7 ; 11 ). Air guiding device ( 1 ) according to one of the preceding claims, wherein at least one sound-absorbing body ( 3 ) over a large area to the main body ( 2 ; 10 ) is pressed. Air guiding device ( 1 ) according to one of the preceding claims, comprising at least one holding device ( 8th ) for fixing at least one sound-absorbing body to the base body ( 2 ; 10 ). Air guiding device ( 1 ) according to claim 6, wherein at least one holding device ( 8th ) a hose-like holding device ( 8th ). Air guiding device ( 1 ) according to claim 7, wherein at least one holding device ( 8th ) is a shrink tube. Air guiding device ( 1 ) according to one of claims 7 or 8, wherein at least one holding device is an elastic hose network. Air guiding device ( 1 ) according to one of the preceding claims, wherein at least one sound-absorbing body ( 3 ) is covered impermeable to air. Air guiding device ( 1 ) according to one of the preceding claims, wherein the housing body ( 2 ; 10 ) is a chemically foamed blow body. Vehicle comprising at least one air guiding device ( 1 ) according to any one of the preceding claims. Vehicle according to claim 12, wherein at least one air guiding device ( 1 ) is technically connected to an air conditioner.  Vehicle according to one of claims 12 or 13, wherein the vehicle is a motor vehicle or an aircraft. Domestic or industrial plant, comprising at least one air guiding device ( 1 ) according to one of claims 1 to 11.

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