CN210637624U

CN210637624U - Noise reduction air pipe

Info

Publication number: CN210637624U
Application number: CN201920798121.3U
Authority: CN
Inventors: 徐运常
Original assignee: Wuhan Junsheng Auto Parts Co ltd
Current assignee: Wuhan Junsheng Auto Parts Co ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-05-29
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses a noise reduction air pipe, which comprises a contraction section, an expansion section and an extension section; one end of the contraction section is provided with an air inlet, and the other end of the contraction section is communicated with one end of the expansion section; the cross-sectional area of the contraction section is gradually reduced from the air inlet to the other end; the other end of the expanding section is communicated with one end of the extending section; the cross sectional area of the expansion section is gradually increased from the contraction section to the extension section; the other end of the extension section is provided with an air outlet; the extension segment includes at least one bend; the cross-sectional area of the extension section is gradually reduced from the expansion section to the air outlet. The utility model provides a noise reduction tuber pipe can effectively improve the instantaneous speed of air current, under the effect that extension section flexion and cross-sectional area constantly reduce, the noise further takes place the refraction and attenuates, and attenuation degree is great, can effectively reduce the noise that spreads into from the air intake; the speed of the airflow transmitted from the air outlet is effectively increased.

Description

Noise reduction air pipe

Technical Field

The utility model relates to an automobile parts technical field specifically relates to an air duct of making an uproar falls.

Background

The automobile air-conditioning air pipe is a pipeline arranged in an air duct of an automobile air-conditioning system, an air inlet of the pipeline is communicated with an outlet of a fan of the air-conditioning system, and an air outlet of the pipeline is communicated with the inside of an automobile and is generally communicated with an outlet of an air conditioner at a center console of the automobile. The existing air pipes generally have two defects, one is that the silencing effect is poor, and the silencing problem is solved by wrapping sound-absorbing materials outside the pipe body by part of the air pipes, but the noise reduction effect is not good by the treatment method; another drawback is that the air flow through the duct is lossy, resulting in a reduction in the delivered wind, a reduction in the wind speed, and if the wind is to be increased, the fan speed needs to be controlled to increase the wind speed, which affects the fan life and also increases the noise.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a noise reduction air pipe, which comprises a contraction section, an expansion section and an extension section;

one end of the contraction section is provided with an air inlet, and the other end of the contraction section is communicated with one end of the expansion section; the cross-sectional area of the tightening section is gradually reduced from the air inlet to the other end;

the other end of the expansion section is communicated with one end of the extension section; the cross sectional area of the expansion section is gradually increased from the contraction section to the extension section;

the other end of the extension section is provided with an air outlet; the extension segment includes at least one bend; the cross-sectional area of the extension section is gradually reduced from the expansion section to the air outlet.

Further, the curved portion includes an inner curved side and an outer curved side; and a connecting piece is arranged on the inward bending side.

Further, the connecting piece also comprises a through hole penetrating through the connecting piece and the inward bending side of the extension section; and the through hole is filled with a suction material.

Further, one end of the sound-absorbing material is flush with the inner wall of the inflected side.

Further, the expanding section is longer than the contracting section; the extension section is longer than the expansion section.

Further, the cross sections of the contraction section, the expansion section and the extension section are circular or elliptical.

Furthermore, the tightening section, the expanding section, the extending section and the connecting piece are of an integrally formed structure.

The utility model provides a noise reduction tuber pipe, through the effect of constriction section and expansion section, make the air current that gets into from the air intake extrude the back again earlier, can effectively improve the instantaneous speed of air current, simultaneously, the noise that air conditioning system passed through the air intake and spreads into the refraction and take place to attenuate by the blocking of constriction section inner wall, the noise is reduced to a certain extent; under the action of the bending part of the extension section and the continuous reduction of the cross section area, noise is further refracted to be attenuated, the attenuation degree is high, and the noise transmitted from the air inlet can be effectively reduced; the speed of the airflow transmitted from the air outlet is effectively increased.

Drawings

Fig. 1 is a schematic structural view of a noise reduction air duct provided by the present invention;

FIG. 2 is a schematic cross-sectional view of the connector of FIG. 1;

wherein, 1, a contraction section; 2. an expansion section; 3. an extension section; 4. an air outlet; 5. an air inlet; 6. a bending section; 7. inward bending side; 8. bending the side outwards; 9. a connecting member; 10. a sound absorbing material.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the utility model provides a noise reduction air pipe, which comprises a contraction section 1, an expansion section 2 and an extension section 3;

one end of the contraction section 1 is provided with an air inlet 5, and the other end is communicated with one end of the expansion section 2; the cross-sectional area of the contraction section 1 is gradually reduced from the air inlet 5 to the other end;

the other end of the expanding section 2 is communicated with one end of the extending section 3; the cross sectional area of the expanding section 2 is gradually increased from the contracting section 1 to the extending section 3;

the other end of the extension section 3 is provided with an air outlet 4; the extension 3 comprises at least one bend 6; the cross-sectional area of the extension section 3 is gradually reduced from the extension section 2 to the air outlet 4.

The bend 6 comprises an inner bend side 7 and an outer bend side 8; the inner bend side 7 or the outer bend side 8 is provided with a connecting piece 9. The connecting piece 9 is used for installing and fixing the noise reduction air pipe on the automobile, and is also provided with a hole for a bolt to penetrate through.

The noise reduction air pipe also comprises a through hole which penetrates through the connecting piece 9 and the inward bending side 7 of the extension section 3; the through hole is filled with a suction material. One end of the sound-absorbing material 10 is flush with the inner wall of the inturned side 7. The sound-absorbing material 10 can be a commercially available sound-absorbing cotton, and is plugged into the through hole, and the plugging length should be calculated in advance, so that the influence of plugging of the overlong sound-absorbing material 10 on the movement track of the airflow is avoided. Since noise is generally refracted at the inner wall of the inflected side 7 or the inflected side 8 of the bent portion 6 when the sound is propagated in the noise reduction duct, if the connector 9 having the sound-absorbing material 10 is provided thereto, the noise can be effectively absorbed.

The expanding section 2 is longer than the contracting section 1; the extension section 3 is longer than the expansion section 2. As shown in fig. 1, if the length of the expanding section 2 is B, the length of the contracting section 1 is a, and the length of the extending section 3 is C, then C > B > a should be provided; in addition, the cross-sectional area of the outlet 4 should be smaller than the cross-sectional area of the inlet 5. The cross sections of the contraction section 1, the expansion section 2 and the extension section 3 are circular or elliptical. The cross-sectional area described in this embodiment is the inner diameter of the corresponding portion. The tightening section 1, the expanding section 2, the extension section 3 and the connecting piece 9 are of an integrally formed structure. Such an integrally formed structure may be achieved by an injection molding process or a blow molding process.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A noise reduction air pipe is characterized by comprising a contraction section, an expansion section and an extension section;

2. The noise reducing air duct of claim 1, wherein the curved portion includes an inturned side and an inturned side; and a connecting piece is arranged on the inward bending side.

3. The noise reducing air duct of claim 2, further comprising a through hole through the connector and the inturned side of the extension section; and sound absorption materials are filled in the through holes.

4. The noise reducing air duct of claim 3, wherein one end of the sound absorbing material is flush with the inner wall of the inturned side.

5. The noise reducing air duct of claim 1, wherein the enlarged section is longer than the constricted section; the extension section is longer than the expansion section.

6. The noise reducing air duct of claim 1, wherein the cross-section of the convergent, divergent and elongate sections is circular or elliptical.

7. The noise reducing air duct of claim 2, wherein the tightening section, the expanding section, the extending section and the connecting member are integrally formed.