Silencer and vehicle

Abstract

The utility model provides a silencer and a vehicle with the silencer, and belongs to the technical field of vehicle parts, and the silencer comprises a silencing bag with a silencing cavity and a rotational flow plate arranged outside the silencing bag. The rotational flow plates are arranged on the silencing bag in a spiral shape, the multiple rotational flow plates are arranged in the circumferential direction of the silencing bag at intervals, and a flowing path for air to flow rotationally is defined between every two adjacent rotational flow plates. According to the silencer, due to the fact that the rotational flow plate is arranged, guided rotational air flow can fully cover the surface of the silencing bag, the contact area between air and the surface of the silencing bag is increased, the contact time between the air and the surface of the silencing bag is prolonged, and therefore the air flow can effectively wrap and take away high-temperature heat accumulated on the surface of the silencing bag. The heat exchange efficiency between the silencing bag and the external environment is greatly enhanced, so that the temperature of the silencer can be reduced, the external heat radiation quantity of the silencer can be reduced, and the problem of heat damage caused by excessive heat accumulation around the silencer can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a muffler. It also relates to a vehicle equipped with the muffler. Background Technology

[0002] The vehicle's exhaust system is located under the chassis. When the vehicle is operating, the exhaust pipes are at extremely high temperatures, which can easily cause heat damage to surrounding components. This is especially true with the increasing popularity of hybrid vehicles, where the battery pack and related accessories are added beneath the chassis, exacerbating the heat problem. Cases of exhaust system overheating leading to the burning of surrounding components and even vehicle fires are not uncommon.

[0003] When a vehicle is idling or climbing at low speed, the high-temperature exhaust gases generated by engine combustion are emitted into the atmosphere through the exhaust system. During this process, as the high-temperature exhaust gases flow through the muffler, the muffler radiates heat outward, causing a significant increase in the ambient temperature around the muffler. Because the hot air is less dense, it rises but cannot effectively exchange heat with the surrounding environment, remaining trapped above the muffler and ultimately leading to heat damage. Utility Model Content

[0004] In view of this, the present invention aims to provide a silencer that has good heat exchange efficiency with the outside gas, which helps to prevent heat damage to the surrounding components of the silencer.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A silencer includes a silencer housing with a silencer cavity and a swirl plate disposed outside the silencer housing;

[0007] The swirling plates are spirally arranged on the silencer, and there are multiple swirling plates spaced apart along the circumference of the silencer, defining a flow path for gas rotation between two adjacent swirling plates.

[0008] Furthermore, it also includes an air inlet pipe located at one end of the silencer and an air outlet pipe located at the other end of the silencer.

[0009] Both the air intake pipe and the air outlet pipe are connected to the muffler cavity, and a hanging part is provided on the air intake pipe for hanging the muffler on the vehicle body.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] The silencer described in this invention comprises multiple spirally arranged silencer packages on the outside, with a flow path for gas rotation defined between adjacent swirl plates. This allows the rotating airflow guided by the swirl plates to fully cover the surface of the silencer packages, increasing airflow velocity and turbulence intensity. This enables the airflow to effectively carry away the high-temperature heat accumulated on the surface of the silencer packages, greatly enhancing the heat exchange efficiency between the silencer packages and the external environment. Consequently, the silencer's temperature and its external heat radiation are reduced, effectively preventing heat damage caused by excessive heat accumulation around the silencer.

[0012] In addition, by setting up intake and exhaust pipes, the exhaust gas discharged from the engine can flow smoothly through the muffler cavity to achieve noise reduction, while the setting of the suspension part facilitates the positioning and fixing of the muffler during vehicle production and assembly.

[0013] In addition, another objective of this utility model is to provide a vehicle equipped with the muffler described above.

[0014] Furthermore, the intercooler of the vehicle has a first air outlet and a second air outlet;

[0015] The intercooler is connected to the vehicle's engine through the first air outlet and supplies gas to the muffler through the second air outlet.

[0016] Furthermore, the vehicle is provided with a delivery pipe communicating with the second air outlet, and a control unit provided on the delivery pipe;

[0017] The delivery pipe supplies gas to the silencer, and the control unit controls the on / off state of the delivery pipe.

[0018] Furthermore, the control unit includes a solenoid valve disposed on the delivery pipe.

[0019] Furthermore, the front end of the vehicle body is provided with a flow guide, which is used to guide the flow of external gas to the muffler.

[0020] The air guide section is provided with an air guide channel. The inlet end of the air guide channel is located near the air intake grille, and the outlet end of the air guide channel extends downward to the chassis.

[0021] Furthermore, in the longitudinal direction of the vehicle, the outlet end of the guide channel is positioned corresponding to the front and rear of the muffler.

[0022] Furthermore, the inlet end of the flow guiding channel is shaped like a trumpet with a gradually decreasing cross-section.

[0023] Furthermore, the flow guiding part includes a flow guiding pipe disposed in the vehicle engine compartment, and the flow guiding pipe forms the flow guiding channel;

[0024] Viewed from the left and right side of the vehicle, the guide pipe is inclined downward from front to back.

[0025] The vehicle described in this utility model, by setting the muffler as described above, can effectively avoid heat damage to the surrounding components of the muffler, thus achieving better performance.

[0026] In addition, by having the intercooler have a first air outlet connected to the engine and a second air outlet for supplying gas to the muffler, the gas supplied by the intercooler can further promote airflow and heat exchange around the muffler, which can more efficiently remove heat from the surface of the muffler, further reduce the heat damage of the muffler, and ensure the safe and stable operation of the muffler and surrounding components.

[0027] By installing a control unit on the delivery pipe, when the vehicle is under high load for extended periods, and the engine exhaust temperature continues to rise, increasing the risk of muffler thermal damage, controlling the delivery pipe's airflow can enhance air convection around the muffler, effectively reducing the muffler temperature, ensuring its normal operation, and minimizing the thermal impact on surrounding components. Conversely, when the engine generates less heat and the risk of muffler thermal damage is lower, the control unit can close the delivery pipe to avoid unnecessary gas delivery, reducing energy consumption in the intercooler and pressure loss during gas transmission. The control unit includes a solenoid valve on the delivery pipe, which has a rapid response capability and can promptly control the opening and closing of the delivery pipe.

[0028] Secondly, by setting a guide section at the front of the vehicle body to direct the flow of outside air to the muffler, the outside air can be directed to the muffler through the guide channel, providing an additional source of cold air for the muffler. Heat can be carried away through heat exchange, further enhancing the heat dissipation capacity of the muffler and effectively reducing the temperature of the muffler, thereby reducing the impact of overheating on surrounding components.

[0029] By aligning the outlet of the airflow channel with the front and rear of the muffler in the front-rear direction of the vehicle, the outside cold air guided by the airflow channel can be blown directly onto the muffler, minimizing energy loss and directional deviation of the airflow during transmission. This enhances the heat dissipation effect of the muffler and better solves the potential heat damage problem of the muffler during vehicle operation.

[0030] Furthermore, designing the inlet of the airflow channel as a flared shape with a gradually decreasing cross-section facilitates a more natural and smooth flow of air from the external environment into the channel. The airflow guide includes a guide pipe located in the vehicle's engine compartment, featuring a simple structure that is easy to design and implement. The inclined design of the guide pipe allows for a more uniform distribution of airflow towards the muffler under the chassis, preventing turbulent airflow or heat buildup in localized areas of the chassis caused by direct vertical impact or improper flow direction. Attached Figure Description

[0031] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the muffler described in an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the muffler described in an embodiment of the present invention from another perspective;

[0034] Figure 3 This is a structural schematic diagram of the muffler described in an embodiment of the present invention from another perspective;

[0035] Figure 4 This is a schematic diagram of the vehicle engine system described in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the arrangement of the flow guiding channel in a vehicle according to an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Muffler; 2. Intake pipe; 3. Exit pipe; 4. Hook; 5. Air filter; 6. Turbocharger; 7. Intercooler; 8. Engine; 9. Delivery pipe; 10. Solenoid valve; 11. Aftertreatment system; K. Air guide channel;

[0039] 101. Swirl plate;

[0040] 601, pressure roller; 602, turbine. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] In the description of this utility model, it should be noted that the directional terms used in this embodiment, such as "up," "down," "left," "right," "front," and "rear," are defined based on the vertical, horizontal, and longitudinal directions of the vehicle. Specifically, the vertical direction of the vehicle is the height direction (Z-axis), the longitudinal direction is the length direction (X-axis), and the horizontal direction is the width direction (Y-axis). Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0044] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Example 1

[0046] Given that existing vehicles are prone to the following problems during use: as high-temperature exhaust gas flows through the muffler, the muffler radiates heat outward, causing a significant increase in the ambient temperature around the muffler and leading to heat damage, this embodiment proposes a novel muffler, including a muffler housing 1 with a muffler cavity and a swirl plate 101 disposed outside the muffler housing 1.

[0047] The swirl plate 101 is spirally arranged on the silencer 1, and there are multiple swirl plates 101 arranged at intervals along the circumference of the silencer 1, and a flow path for gas rotation is defined between two adjacent swirl plates 101.

[0048] The silencer in this embodiment uses multiple spirally arranged silencer packages 1 on the outside of the silencer package 1, and defines a flow path for the rotating gas flow between two adjacent swirl plates 101. As a result, the rotating airflow guided by the swirl plates 101 can fully cover the surface of the silencer package 1, increasing the contact area and contact time between the air and the surface of the silencer package 1, and improving the airflow velocity and turbulence intensity. This allows the airflow to effectively carry away the high-temperature heat accumulated on the surface of the silencer package 1, greatly enhancing the heat exchange efficiency between the silencer package 1 and the external environment. This reduces the temperature of the silencer and its external heat radiation, effectively preventing heat damage caused by excessive heat accumulation around the silencer.

[0049] Based on the above overall description, an exemplary structure of the silencer in this embodiment is described below. Figures 1 to 3 As shown in the diagram, in a further embodiment, this embodiment also includes an intake pipe 2 located at one end of the muffler 1 and an exhaust pipe 3 located at the other end of the muffler 1. Both the intake pipe 2 and the exhaust pipe 3 are connected to the muffler cavity, and a hanging part is provided on the intake pipe 2 for suspending the muffler on the vehicle body. Here, by providing the intake pipe 2 and the exhaust pipe 3, the exhaust gas discharged from the engine 8 can flow smoothly through the muffler cavity to achieve noise reduction, while the hanging part facilitates the positioning and fixing of the muffler during vehicle production and assembly.

[0050] Specifically, in combination Figures 1 to 3 As shown, the silencer 1 is cylindrical in shape, and three swirl plates 101 are spaced apart along the circumference of the silencer 1, forming three airflow channels on the outside of the silencer 1. In this embodiment, making the silencer 1 cylindrical allows the airflow to pass through its surface relatively evenly and smoothly, reducing airflow turbulence and local pressure changes caused by abrupt shape changes, and providing a more stable basic structure for subsequent noise reduction and heat dissipation functions. By forming three heat dissipation channels, the contact area and contact time between the silencer 1 and the outside air can be effectively increased, allowing the airflow to more fully wrap around the outer surface of the silencer 1, and heat can be better transferred to the surrounding air, thereby reducing the heat of the silencer.

[0051] Furthermore, as a further embodiment, the three swirl plates 101 are evenly distributed along the circumference of the silencer package 1, so that the airflow can flow in a relatively stable manner within the three channels, reducing problems such as vibration, additional noise, and impact on the silencer structure that may be caused by unstable airflow. It should be noted that the number of swirl plates 101 can be two or more, in addition to the three shown in the figure.

[0052] In addition, to facilitate connection of this silencer to external devices, such as Figure 1 As shown, flanges are provided at the ends of the intake pipe 2 and the exhaust pipe 3, respectively, for bolting connection to external components via the flanges. Additionally, as a specific embodiment, such as... Figure 1 As shown, the suspension part of this embodiment includes hooks 4 provided on the air intake pipe 2, and to improve the suspension stability, the hooks 4 in this embodiment are preferably two on both sides of the air intake pipe 2. In specific applications, the muffler of this embodiment can be suspended on the vehicle body by a rubber hanger that is hooked and connected to the hooks 4.

[0053] It should be noted that, in addition to the two hooks 4 mentioned above, the hanging part in this embodiment can also adopt other structures, as long as it can hang the muffler on the vehicle body.

[0054] By adopting the above structure, the muffler in this embodiment can ensure that the rotating airflow guided by the swirl plate 101 can fully cover the surface of the muffler 1, increasing the contact area and contact time between the air and the surface of the muffler 1. This can effectively reduce the temperature of the muffler and reduce its external heat radiation, thereby effectively avoiding heat damage problems caused around the muffler.

[0055] Example 2

[0056] This embodiment relates to a vehicle equipped with a muffler as described in Embodiment 1, and the number of mufflers is not limited to one; multiple mufflers can be installed as needed.

[0057] The vehicle in this embodiment, by setting a muffler as in Embodiment 1, can effectively avoid heat damage to the surrounding components of the muffler, thus achieving better performance.

[0058] Furthermore, the overall structure of the vehicle's engine system in this embodiment is the same as that in the prior art, and refers to... Figure 4 As shown, the system includes an engine 8, an intercooler 7, the aforementioned muffler, a turbocharger 6, an air filter 5, and an after-treatment system 11. The turbocharger 6 includes a pressure roller 601 and a turbine 602. The pressure roller 601 is connected to the intake end of the intercooler 7, and the turbine 602 is coaxially mounted with the pressure roller 601. The turbine 602 is connected to the engine 8, the air filter 5 is connected to the pressure roller 601, one end of the after-treatment system 11 is connected to the turbine 602, and the other end of the after-treatment system 11 is connected to the muffler.

[0059] The difference lies in, for example Figure 4 As shown, the intercooler 7 in this embodiment has a first air outlet and a second air outlet. The intercooler 7 is connected to the vehicle's engine 8 through the first air outlet and supplies gas to the muffler 1 through the second air outlet. With this configuration, the gas supplied by the intercooler 7 can further promote airflow and heat exchange around the muffler 1, so that the gas supplied by the intercooler 7 works in synergy with the air originally flowing between the swirl plates 101 to more efficiently remove heat from the surface of the muffler 1, further reducing the heat damage problem of the muffler and ensuring the safe and stable operation of the muffler and surrounding components.

[0060] In this preferred embodiment, the vehicle is equipped with a delivery pipe 9 connected to the second air outlet, and a control unit located on the delivery pipe 9. The delivery pipe 9 supplies gas to the muffler 1, and the control unit controls the opening and closing of the delivery pipe 9. The advantage of this design is that, on the one hand, when the control unit opens the passage of the delivery pipe 9, the gas supplied by the intercooler 7 can provide additional airflow to the muffler 1 in a timely manner according to the vehicle's operating conditions and the actual needs of the muffler. When the muffler faces a large heat load, the exhaust temperature of the engine 8 continues to rise, and the risk of heat damage to the muffler increases, the ventilation of the delivery pipe 9 can enhance air convection around the muffler 1, working in conjunction with the swirl plate 101 to more efficiently remove heat from the surface of the muffler 1, effectively reducing the muffler temperature, ensuring its normal operation, and reducing the thermal impact on surrounding components.

[0061] On the other hand, when the engine 8 generates less heat and the risk of heat damage to the muffler is low, the control unit can close the delivery pipe 9 to avoid unnecessary gas delivery, reduce the energy consumption of the intercooler 7 and the pressure loss during gas transmission, which is beneficial to improving the vehicle's fuel economy and the overall efficiency of the power system. In a preferred embodiment, the control unit includes a solenoid valve 10 located on the delivery pipe 9.

[0062] Among them, the solenoid valve 10 is a mature technology, readily available, and easy to design and implement. Furthermore, the solenoid valve 10 can be connected to the vehicle's electronic control system (such as the engine control unit 8) to achieve highly precise on / off control. Under different operating conditions of the vehicle, the vehicle's electronic control system (based on real-time data collected by various sensors (such as muffler temperature monitored by a temperature sensor, exhaust pressure detected by a pressure sensor, etc.)) can send accurate electrical signals to the solenoid valve 10, causing it to open or close as needed. This precisely regulates whether the gas in the delivery pipe 9 flows to the muffler 1, thus better adapting to the actual needs of the muffler and ensuring its good performance.

[0063] like Figure 5 As shown in the diagram, as a further embodiment, the front of the vehicle body in this embodiment is provided with a flow guide section, which is used to guide the flow of external gas to the muffler 1. Furthermore, the flow guide section is provided with a flow guide channel K, the inlet end of which is located near the air intake grille, and the outlet end of which extends downwards to the chassis.

[0064] The flow guide section allows external gas to flow continuously towards the muffler 1 through the flow guide channel K, providing an additional source of cold air for the muffler 1. This cold air comes into contact with the surface of the muffler 1, carrying away heat through heat exchange. Working in synergy with the gas delivered by the swirl plate 101 and the intercooler 7, it further enhances the muffler's heat dissipation capacity, effectively reducing the muffler's temperature, ensuring its stable operation, and minimizing the impact of overheating on surrounding components.

[0065] As a further implementation, the outlet end of the airflow guide channel K is positioned corresponding to the front and rear of the muffler in the front-rear direction of the vehicle. This arrangement allows the outside cold air guided by the airflow guide channel K to blow directly onto the muffler, minimizing energy loss and directional deviation during airflow transmission and ensuring that the cold air can quickly and fully contact the muffler surface. This allows for more efficient heat exchange, more rapidly removing the high-temperature heat from the muffler surface, enhancing the muffler's heat dissipation effect, and thus better addressing potential heat damage to the muffler during vehicle operation.

[0066] In addition, as an effective implementation example, such as Figure 5 As shown, the inlet end of the airflow guide channel K is shaped like a trumpet with a gradually decreasing cross-section. This design allows the airflow guide channel K to efficiently converge the external airflow from the front of the vehicle. When the vehicle is in motion, as outside air enters the area around the front of the vehicle through the air intake grille, the trumpet-shaped inlet end gradually gathers the dispersed airflow, guiding more air into the airflow guide channel K. Simultaneously, the gradually decreasing cross-section design of the inlet end of the airflow guide channel K significantly increases the speed of the incoming airflow as it is converged. This faster airflow speed helps the airflow move more smoothly within the airflow guide channel K, more effectively impacting and carrying away heat from the surface of the muffler 1, further improving the muffler's heat dissipation efficiency and more effectively addressing the heat damage issues faced by the muffler during vehicle operation.

[0067] In this specific embodiment, the airflow guide includes a guide pipe located in the vehicle's engine compartment. The guide pipe forms a guide channel K, and when viewed from the left-right direction of the vehicle, the guide pipe is inclined downwards from front to back. The airflow guide, including the guide pipe in the vehicle's engine compartment, has a simple structure and is easy to design and implement. Inclining the guide pipe allows the airflow towards the muffler 1 to be distributed more evenly under the chassis, avoiding turbulent airflow or heat accumulation in localized areas of the chassis due to direct vertical impact or unreasonable flow direction.

[0068] Among them, such as Figure 5The diagram only shows the routing of the guide channel K in the left-right direction of the vehicle. In practice, the cross-section of the guide pipe can be circular or rectangular. Furthermore, considering the presence of the engine 8, transmission, various pipes, and electrical equipment within the engine compartment, the guide pipe can be curved and positioned between these components, or utilize unused space within the engine compartment. For example, the guide pipe can be placed between the engine block and the engine compartment wall, ensuring sufficient safety distance from the engine 8's cooling system, intake system, and other components. Additionally, the guide pipe can be fixed to the engine compartment's frame structure using brackets or clamps. For instance, mounting points can be set on the longitudinal or transverse beams of the engine compartment, and metal brackets can be used to securely fix the guide pipe at these locations. The shape and size of the brackets are designed based on the outer diameter of the guide pipe and the structure of the engine compartment frame to ensure stable installation of the guide pipe.

[0069] Furthermore, the inlet of the air intake duct should be as close as possible to the air intake grille to fully utilize the oncoming airflow during vehicle movement. The inlet can be located to the side or below the air intake grille. The outlet of the air intake duct should extend to the bottom of the engine compartment and be able to connect with other airflow guiding components on the chassis (if any) or directly with the airflow channels around the muffler 1. The location of the air intake duct's outlet must ensure that the outflowing airflow accurately reaches the muffler 1 and avoid collisions with other components on the bottom of the engine compartment (such as brake lines, suspension components, etc.) during tilting.

[0070] Based on the above overall description, the vehicle in this embodiment, by adopting the above structure, can, under idling or low-speed conditions, transmit the air drawn in by the fan to the muffler through the delivery pipe 9 connected to the intercooler 7, thereby purging the muffler module and reducing the surface temperature of the muffler, thus reducing the amount of heat radiation emitted by the muffler. Under high-speed driving conditions, external airflow can enter the guide channel K through the air intake grille at the front of the vehicle and be transmitted to the muffler, achieving active purging of the muffler module, enhancing the external heat exchange of the muffler module, reducing external heat radiation, and preventing heat damage to surrounding components.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A silencer, characterized in that: It includes a silencing package (1) with a silencing cavity, and a swirl plate (101) disposed outside the silencing package (1); The swirling plate (101) is spirally arranged on the silencer (1), and there are multiple swirling plates (101) spaced apart along the circumference of the silencer (1), defining a flow path for gas rotation between two adjacent swirling plates (101).

2. The silencer according to claim 1, characterized in that: It also includes an air inlet pipe (2) located at one end of the silencer (1) and an air outlet pipe (3) located at the other end of the silencer (1); Both the intake pipe (2) and the exhaust pipe (3) are connected to the muffler cavity, and a hanging part is provided on the intake pipe (2) for hanging the muffler on the vehicle body.

3. A vehicle, characterized in that: The vehicle is equipped with the muffler as described in claim 1 or 2.

4. The vehicle according to claim 3, characterized in that: The intercooler (7) of the vehicle has a first air outlet and a second air outlet; The intercooler (7) is connected to the engine (8) of the vehicle through the first air outlet and supplies gas to the muffler (1) through the second air outlet.

5. The vehicle according to claim 4, characterized in that: The vehicle is provided with a delivery pipe (9) that communicates with the second air outlet, and a control unit provided on the delivery pipe (9); The delivery pipe (9) delivers gas to the silencer (1), and the control unit controls the opening and closing of the delivery pipe (9).

6. The vehicle according to claim 5, characterized in that: The control unit includes a solenoid valve (10) disposed on the delivery pipe (9).

7. The vehicle according to any one of claims 3 to 6, characterized in that: The front end of the vehicle body is provided with a flow guide, which is used to guide the external gas flow to the sound-absorbing bag (1); The air guide section is provided with an air guide channel (K), the inlet end of the air guide channel (K) is located near the air intake grille, and the outlet end of the air guide channel (K) extends downward to the chassis.

8. The vehicle according to claim 7, characterized in that: In the longitudinal direction of the vehicle, the outlet end of the guide channel (K) is arranged correspondingly to the front and rear of the muffler.

9. The vehicle according to claim 7, characterized in that: The inlet end of the flow guide channel (K) is shaped like a trumpet with a gradually decreasing cross-section.

10. The vehicle according to claim 7, characterized in that: The flow guide includes a flow guide pipe disposed in the vehicle engine compartment, and the flow guide pipe forms the flow guide channel (K); Viewed from the left and right side of the vehicle, the guide pipe is inclined downward from front to back.

Images