Silencer assembly with active auxiliary drainage function

Abstract

The utility model discloses a silencer assembly with an active auxiliary drainage function, and belongs to the technical field of automobile silencing. A drain hole is formed in the bottom of a silencer body, a mounting plate is arranged at the air inlet end of the silencer body, one end of an L-shaped connecting pipe is communicated with an air inlet pipe of the silencer body, the outer wall of the L-shaped connecting pipe is fixed to one end of a fixing plate, the other end of the L-shaped connecting pipe is communicated with the air inlet end of a conical shell, and the other end of the fixing plate is fixed to the mounting plate. And the end panel is provided with a plurality of air outlet holes corresponding to the positions of the drain holes up and down. The exhaust pressure and temperature directly act on the drainage hole area through the conical airflow diffuser, condensate water is actively removed through the dual functions of airflow purging and heating, and the requirements for exhaust and noise reduction are met; the technical problems that the exhaust back pressure rises and the engine power is limited due to the fact that a traditional passive drainage structure is prone to ice blockage in the extremely cold environment are solved, the drainage efficiency is remarkably improved, and the reliability under the extremely cold extreme working condition is ensured.

Description

Technical Field

[0001] This utility model relates to a muffler assembly with active auxiliary drainage, belonging to the field of automotive noise reduction technology. Background Technology

[0002] In a car's exhaust system, exhaust gases produced by engine combustion are transported through components such as the exhaust manifold, front exhaust pipe, and catalytic converter to the muffler for noise reduction before being emitted. Because the exhaust gases contain water vapor, when the vehicle operates in low-temperature environments (especially in cold northern winters), the water vapor condenses into liquid water on the inner wall of the exhaust system and flows along the pipe wall to the bottom of the muffler, where it accumulates. In conventional technical solutions, the industry typically employs a passive drainage hole design at the lowest point of the muffler housing, utilizing gravity to allow the condensate to drain naturally.

[0003] However, the above-mentioned passive drainage scheme has significant technical defects in extremely cold climates: when the ambient temperature remains below freezing, the condensate accumulated inside the muffler freezes before it is completely drained, causing the drain hole to become blocked and ice blockage to form.

[0004] This problem will directly cause an abnormal increase in exhaust back pressure, which manifests as increased engine exhaust resistance and increased pumping losses, thereby deteriorating the fuel economy of the entire vehicle. More seriously, when the degree of ice blockage reaches the threshold, the sharp rise in exhaust system back pressure may trigger the engine control unit to enter protection mode, limiting power output or even causing the engine to shut down or fail to start cold.

[0005] While existing technical solutions can achieve condensate management under normal operating conditions through passive structures, they do not fully consider the dynamic matching problem between condensate freezing rate and drainage efficiency in extremely cold environments. Their technical limitations mean that the reliability of vehicle operation under specific climatic conditions cannot be guaranteed.

[0006] Therefore, there is an urgent need to develop a composite drainage mechanism that combines active intervention and passive drainage in order to overcome the performance bottleneck of traditional structures under extreme working conditions. Utility Model Content

[0007] To address the problems existing in the background art, this utility model provides a silencer assembly with active auxiliary drainage.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a muffler assembly with active auxiliary drainage, comprising a muffler body, an airflow diffuser, and a mounting plate; the bottom of the muffler body is provided with multiple drainage holes, the air inlet end of the muffler body is fixedly mounted with the mounting plate, the airflow diffuser is fixedly mounted on the mounting plate, the air inlet end of the airflow diffuser is connected to the air inlet pipe of the muffler body, and the exhaust end of the airflow diffuser faces the area where the drainage holes are located.

[0009] Furthermore, the airflow diffuser includes an L-shaped connecting pipe, a conical shell, and a fixing plate; one end of the L-shaped connecting pipe is connected to the air inlet pipe of the muffler body, the outer wall of the L-shaped connecting pipe is fixed to one end of a plurality of fixing plates, the other end of each fixing plate is fixed to a mounting plate, the other end of the L-shaped connecting pipe is connected to the air inlet end of the conical shell, and the exhaust end of the conical shell is oriented towards the drain hole.

[0010] Furthermore, the exhaust end of the conical shell is fixed with an end panel, and the end panel is provided with a number of air outlets that are vertically and vertically aligned with the positions of the drain holes.

[0011] Furthermore, the exhaust end of the conical shell is fixed inside the first silencing cavity.

[0012] Furthermore, the airflow diffuser is made of a high-temperature resistant and corrosion-resistant alloy material.

[0013] Furthermore, the inner wall of the muffler body housing is covered with a heat insulation layer, which is made of high-temperature resistant material, and the thickness of the heat insulation layer in the area around the drain hole is less than the thickness in other areas.

[0014] Furthermore, the edge of the drainage hole is provided with an outwardly extending flange.

[0015] Furthermore, the housing of the muffler body is formed by a roll welding process.

[0016] Furthermore, the end cap of the muffler body is sealed and connected to the housing of the muffler body through a spinning and rolling process.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention utilizes a conical airflow diffuser to directly apply exhaust pressure and temperature to the drain hole area, actively removing condensate through a dual action of airflow purging and heating. While achieving exhaust noise reduction, it solves the technical problem of traditional passive drainage structures being prone to ice blockage in extremely cold environments, leading to increased exhaust back pressure and limited engine power. This significantly improves drainage efficiency and ensures reliability under extreme cold conditions. At the same time, the differentiated thickness insulation layer and the drain hole flange structure optimize thermal management and shell strength. Combined with a modular welding design, it reduces costs while achieving high compatibility with existing vehicle exhaust systems, combining technological advancement with market potential. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 yes Figure 1A bottom view;

[0021] Figure 3 This is a schematic diagram of an airflow diffuser. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0023] A muffler assembly with active auxiliary drainage includes a muffler body 1, an airflow diffuser 2, and a mounting plate 5. The bottom of the muffler body 1 has multiple arrayed drainage holes 3. The air inlet end of the muffler body 1 is fixedly mounted to the mounting plate 5 by welding. The airflow diffuser 2 is fixedly mounted to the mounting plate 5 by welding. The air inlet end of the airflow diffuser 2 is connected to the air inlet pipe 9 of the muffler body 1. The exhaust end of the airflow diffuser 2 faces the area where the drainage holes 3 are located, thus directly applying exhaust pressure to the drainage holes 3 of the muffler body 1. While satisfying the exhaust noise reduction requirement, the auxiliary exhaust airflow effectively blows the water vapor gathered around the drainage holes 3 out of the muffler body 1's casing, thereby achieving the muffler's drainage function.

[0024] Furthermore, the airflow diffuser 2 includes an L-shaped connecting pipe 6, a conical shell 7, and a fixing plate 10; one end of the L-shaped connecting pipe 6 is connected to the air inlet pipe 9 of the muffler body 1, the outer wall of the L-shaped connecting pipe 6 is welded and fixed to one end of a plurality of fixing plates 10 evenly distributed along its circumference, the other end of each fixing plate 10 is welded and fixed to the mounting plate 5, the other end of the L-shaped connecting pipe 6 is connected to the air inlet end (small end) of the conical shell 7, and the exhaust end (large end) of the conical shell 7 is oriented towards the drain hole 3.

[0025] Furthermore, an end panel 11 is welded and fixed to the exhaust end of the conical shell 7. The end panel 11 has several air outlet holes 8 arranged vertically and vertically corresponding to the positions of the drain holes 3 through its wall thickness array, so as to make full use of the exhaust air pressure and temperature effect to accelerate the water vapor discharge speed, and achieve air diffusion while achieving a porous noise reduction effect.

[0026] Furthermore, the interior of the muffler body 1 is composed of multiple partitions 4 forming multiple muffler cavities, and the exhaust end of the conical shell 7 is fixed to the first muffler cavity by welding.

[0027] Furthermore, the airflow diffuser 2 is made of a high-temperature and corrosion-resistant alloy material, such as INCONEL 601 alloy and HASTELLOY C-22 alloy, to ensure its stable operation under long-term high-temperature and corrosive environments. Its surface is coated with an anti-oxidation coating with a thickness of 5-10 μm.

[0028] Furthermore, the inner wall of the muffler body 1 is covered with a heat insulation layer, which is made of high-temperature resistant materials, such as basalt fiber material or ceramic fiber material. The thickness of the heat insulation layer in the area around the drain hole 3 is less than the thickness in other areas to enhance heat transfer at the drain hole 3.

[0029] Furthermore, the edge of the drain hole 3 is provided with an outwardly extending flange, and the outer surface of the flange forms a guide slope. The guide slope is consistent with the exhaust direction of the airflow diffuser 2, so as to use the exhaust airflow to accelerate the discharge of water vapor.

[0030] Furthermore, the housing of the muffler body 1 is constructed using a roll welding process to ensure structural strength and sealing.

[0031] Furthermore, the end cap 12 of the muffler body 1 is sealed and connected to the shell of the muffler body 1 through a spinning and rolling process to ensure the integrity and sealing of the muffler.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A silencer assembly with active auxiliary drainage, characterized in that: It includes a muffler body (1), an airflow diffuser (2), and a mounting plate (5); the bottom of the muffler body (1) is provided with multiple drainage holes (3), the air inlet end of the muffler body (1) is fixedly installed with the mounting plate (5), the airflow diffuser (2) is fixedly installed on the mounting plate (5), the air inlet end of the airflow diffuser (2) is connected to the air inlet pipe (9) of the muffler body (1), and the exhaust end of the airflow diffuser (2) faces the area where the drainage holes (3) are located.

2. A silencer assembly with active auxiliary drainage according to claim 1, characterized in that: The airflow diffuser (2) includes an L-shaped connecting pipe (6), a conical shell (7), and a fixing plate (10); one end of the L-shaped connecting pipe (6) is connected to the air inlet pipe (9) of the muffler body (1), the outer wall of the L-shaped connecting pipe (6) is fixed to one end of a plurality of fixing plates (10), the other end of each fixing plate (10) is fixed to the mounting plate (5), the other end of the L-shaped connecting pipe (6) is connected to the air inlet end of the conical shell (7), and the exhaust end of the conical shell (7) is set towards the drain hole (3).

3. A silencer assembly with active auxiliary drainage according to claim 2, characterized in that: The exhaust end of the conical shell (7) is fixed with an end panel (11), and the end panel (11) is provided with a number of air outlets (8) that are arranged vertically and vertically corresponding to the positions of the drain holes (3).

4. A silencer assembly with active auxiliary drainage according to claim 2 or 3, characterized in that: The exhaust end of the conical shell (7) is fixed inside the first silencer cavity.

5. A silencer assembly with active auxiliary drainage according to claim 4, characterized in that: The airflow diffuser (2) is made of a high-temperature resistant and corrosion-resistant alloy material.

6. A silencer assembly with active auxiliary drainage according to claim 1, characterized in that: The inner wall of the muffler body (1) is covered with a heat insulation layer, which is made of high temperature resistant material, and the thickness of the heat insulation layer in the area around the drain hole (3) is less than the thickness in other areas.

7. A silencer assembly with active auxiliary drainage according to claim 1, characterized in that: The drainage hole (3) has an outwardly extending flange at its edge.

8. A silencer assembly with active auxiliary drainage according to claim 7, characterized in that: The shell of the muffler body (1) is achieved by a roll welding process.

9. A silencer assembly with active auxiliary drainage according to claim 8, characterized in that: The end cap (12) of the muffler body (1) is sealed and connected to the shell of the muffler body (1) by a spinning and rolling process.

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