Low-air-resistance air path structure

Abstract

The utility model provides a low air resistance air path structure which comprises an air pipe and an air bag connected outside the air pipe in a sleeved mode, a support is installed at the position of an air outlet of the air pipe, the support is located inside the air bag, the support comprises a connecting part and an installing part, the connecting part is embedded in the air pipe, an air outlet is formed in the end of the installing part, and the air outlet is arranged in an inclined mode. The air passing hole inclining towards the middle of the air bag can prevent air flow from generating vortex in the air bag in the inflation / deflation process, and therefore air resistance is reduced. The outer wall of the air outlet and the inner wall of the support are in arc connection to form a chamfer, airflow can be quickly dredged in the inflation / deflation process, vortex is avoided, air resistance is reduced, surrounding airflow can be quickly gathered in the deflation process, and the effects of reducing air resistance and quickly deflating are achieved. The installation part is provided with the installation groove, the silencing piece is installed in the installation groove, the silencing piece and the air outlet are assembled in an inclined face mode, the air passing area of the silencing piece is increased, and therefore the air resistance is reduced, and the silencing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a low-air-resistance air circuit structure. Background Technique

[0002] With the development of the automobile industry, more and more automobiles have entered actual production and life, and automobiles have greatly facilitated people's lives. Existing automobile seats are suitable for various sitting postures to reduce the fatigue caused by long-term driving. Usually, a lumbar support and a massage airbag are installed on the seat backrest. The lumbar support and the massage airbag are used to provide a large-area support for the waist and spine of the driver and passengers, improve the comfort of riding or driving, reduce the fatigue feeling, and play a role in protecting the spine at the same time.

[0003] Existing lumbar supports and massage airbags generally inflate the airbags quickly through an air pipe. The airbag is sleeved outside the air pipe, and the sleeved part is sealed to avoid air leakage. In order to reduce the noise generated when the airbag is inflated, a silencing piece is arranged at the air outlet position of the air pipe. However, the silencing piece will vibrate under the impact of the air flow, and still generate some noise. At the same time, the setting of the silencing piece will increase the air resistance of the entire air circuit and reduce the speed of air inflation and deflation. Content of the Utility Model

[0004] The utility model provides a low-air-resistance air circuit structure to solve the technical problems put forward in the background technique.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] The low-air-resistance air circuit structure includes an air pipe and an airbag sleeved outside the air pipe. A bracket is installed at the air outlet position of the air pipe, and the bracket is located inside the airbag; the bracket includes a connecting part and an installation part. The connecting part is embedded in the air pipe. An air flow channel is arranged inside the bracket, and the air flow channel is communicated with the air pipe through the connecting part; an air outlet is arranged at the end of the installation part, and the air outlet is inclined, and the inclination direction faces the air passing hole in the middle of the airbag. An arc connection is adopted between the outer wall of the air outlet and the inner wall of the air flow channel inside the bracket to form a chamfer; installation grooves penetrating through the installation part are arranged on both the upper and lower sides of the installation part, and silencing pieces are installed in the installation grooves, and the silencing pieces are inclined.

[0007] As a further preference of the utility model, the connecting part and the installation part are integrally processed, and the material is plastic, steel, aluminum alloy or stainless steel.

[0008] As a further preference of the utility model, the installation part is in a horn shape.

[0009] As a further preference of the present utility model, a limiting convex portion is provided on the inner wall of the same side of the two installation grooves, and the limiting convex portion is in a vertical strip shape.

[0010] As a further preference of the present utility model, at least two of the limiting convex portions in the installation grooves are provided, and their transverse cross-sections are triangular or semi-circular arcs.

[0011] As a further preference of the present utility model, the inclination angle of the air outlet is 45° to 80°.

[0012] As a further preference of the present utility model, the inclination direction of the sound-absorbing sheet is the same as the inclination direction of the air outlet, and the inclination degree is the same as the inclination angle of the air outlet.

[0013] As a further preference of the present utility model, the connecting portion is cylindrical and is fixedly connected to the air pipe by means of threaded connection or socket connection.

[0014] Compared with the prior art, the present utility model has the following advantages or beneficial effects:

[0015] 1. The air outlet position of the bracket is inclined, and the inclination direction faces the through hole in the middle of the airbag, which can avoid the generation of eddy currents in the airbag during the inflation / deflation process, thereby reducing the air resistance; 2. The large chamfer provided at the air outlet position has a flow guiding function, which can quickly guide the air flow during the inflation / deflation process, avoid the generation of eddy currents and thus reduce the air resistance, and can quickly gather the surrounding air flow when deflating, achieving the effect of reducing the air resistance and quickly deflating; 3. The sound-absorbing sheet and the air outlet of the bracket are assembled in an inclined plane, increasing the air passing area of the sound-absorbing sheet, thereby reducing the air resistance and playing a role in noise reduction; 4. The sound-absorbing sheet is installed in the installation groove by an insertion method, which is convenient for the installation and replacement of the sound-absorbing sheet; 5. The installation groove is provided with a strip-shaped limiting convex portion, which fixes the sound-absorbing sheet and at the same time prevents the sound-absorbing sheet from shaking due to the air flow, further reducing the noise. Description of the Drawings

[0016] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present utility model and its features, appearance and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the focus is on showing the gist of the present utility model.

[0017] Figure 1 Structural schematic of the present utility model Figure 1 ;

[0018] Figure 2 is Figure 1 A-sectional view in the direction A of, and the arrow in the figure indicates the air flow direction during inflation / deflation;

[0019] Figure 3 is Figure 2 an enlarged schematic view of the middle bracket part;

[0020] Figure 4 is a schematic structural view of the installation groove;

[0021] In the figure, 1 is an air pipe, 2 is an air bag, 3 is a bracket, 31 is a connecting part, 32 is an installation part, 321 is an air outlet, 322 is an installation groove, 323 is a limiting protrusion part, and 4 is a sound absorption sheet. Specific embodiments

[0022] As shown in this part and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include plural. The "first", "second" and similar words used in this part do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0023] The following further describes the present invention in detail with reference to the specification drawings and specific embodiments.

[0024] Please refer to Figures 1 - 3 , this embodiment provides a low-air-resistance air path structure, including an air pipe 1 and an air bag 2 sleeved outside the air pipe 1. A bracket 3 is installed at the air outlet position of the air pipe 1, and the bracket 3 is located inside the air bag 1. The bracket 3 includes a connecting part 31 and an installation part 32. The connecting part 31 is embedded in the air pipe 1. An air flow channel is provided inside the bracket 3, and the air flow channel communicates with the air pipe 1 through the connecting part 31. An air outlet 321 is provided at the end of the installation part 32. The air outlet 321 is inclined, and the inclined direction faces the through-hole in the middle of the air bag 2. An arc connection is used between the outer wall of the air outlet 321 and the inner wall of the air flow channel inside the bracket 3 to form a chamfer; Installation grooves 322 penetrating through the installation part 32 are provided on both the upper and lower sides of the installation part 32, and sound absorption sheets 4 are installed in the installation grooves 322. The sound absorption sheets 4 are inclined.

[0025] Further explanation, since the air vent hole c in the middle of the airbag 2 moves during the inflation / deflation process of the airbag 2, the inclination angle of the air outlet 321 can be adjusted according to the actual situation. In this embodiment, the inclination angle of the air outlet 321 is set to 68°. During the inflation / deflation process of the airbag 2, the inclination direction of the air outlet 321 can just face the air vent hole, so that the generation of eddy currents of the air flow inside the airbag 2 during the inflation / deflation process can be avoided, and the effect of reducing air resistance is achieved.

[0026] Further explanation, the inclination direction of the sound-absorbing sheet 4 is the same as that of the air outlet 321, and the inclination degree is also 68°. The sound-absorbing sheet 4 and the air outlet 321 are assembled in a beveled surface, which increases the air passage area of the sound-absorbing sheet 4, thereby reducing the air resistance and playing a role in noise reduction. As Figure 4 shown, two limit protrusion parts 323 are arranged on the right inner walls of the two installation grooves 322. The limit protrusion parts 323 are vertically long strips, and their transverse cross-sections are triangular. The arrangement of the limit protrusion parts 323 facilitates the installation and disassembly of the sound-absorbing sheet 4, and at the same time plays a role in fixing the sound-absorbing sheet 4, avoiding the shaking of the sound-absorbing sheet 4 caused by the air flow, and further reducing the noise. Preferably, two limit protrusion parts are arranged in each installation groove 322, and their transverse cross-sections are triangular.

[0027] Further explanation, the connecting part 31 is cylindrical, and can be connected to the air pipe 1 by means of threaded connection or socket connection. A sealing ring is arranged at the connection to avoid air leakage. The connecting part 31 and the installation part 32 are integrally processed and formed, with a simple structure and high strength. The material is selected as plastic, which can reduce the damage caused by the bracket 3 to the airbag 2 when the airbag 2 is stressed, and at the same time reduces the production cost. The installation part 32 is in a horn shape. When the air flow passes through the air outlet 321, it will be subject to a certain resistance. The horn-shaped design can reduce the cross-sectional area of the air outlet, thereby reducing the air resistance.

[0028] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. Low air resistance air path structure, including an air pipe (1) and an air bag (2) sleeved outside the air pipe (1), characterized in that, A bracket (3) is installed at the air outlet position of the trachea (1), and the bracket (3) is located inside the airbag (2). The bracket (3) includes a connecting portion (31) and an installation portion (32). The connecting portion (31) is embedded in the trachea (1). An air flow channel is provided inside the bracket (3), and this air flow channel communicates with the trachea (1) through the connecting portion (31). An air outlet (321) is provided at the end of the installation portion (32). The air outlet (321) is inclined, and the inclined direction faces the air passing hole in the middle of the airbag (2). An arc connection is used between the outer wall of the air outlet (321) and the inner wall of the air flow channel inside the bracket (3) to form a chamfer. Installation grooves (322) penetrating through the installation portion (32) are provided on both the upper and lower sides of the installation portion (32), and sound-absorbing sheets (4) are installed in the installation grooves (322). The sound-absorbing sheets (4) are inclined.

2. The low air resistance air path structure according to claim 1, wherein The connecting portion (31) and the installation portion (32) are integrally processed, and the material is plastic, steel, aluminum alloy or stainless steel.

3. The low air resistance air path structure according to claim 2, characterized in that The installation portion (32) is in a horn shape.

4. The low air resistance air path structure according to claim 1, wherein Limiting convex portions (323) are provided on the inner walls on the same side of the two installation grooves (322), and the limiting convex portions (323) are in a vertical strip shape.

5. The low air resistance air path structure according to claim 4, characterized in that, At least two limiting convex portions (323) are provided in the installation grooves (322), and their transverse cross-sections are triangular or semi-circular arc-shaped.

6. The low-air-resistance air path structure according to claim 1, characterized in that, The inclination angle of the air outlet (321) is 45° - 80°.

7. The low-air-resistance air path structure according to claim 6, wherein The inclination direction of the sound-absorbing sheet (4) is the same as the inclination direction of the air outlet (321), and the inclination degree is the same as the inclination angle of the air outlet (321).

8. The low-air-resistance air path structure according to claim 1, wherein The connecting portion (31) is cylindrical and is fixedly connected to the trachea (1) by means of threaded connection or socket connection.

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