Tailpipe assembly and vehicle having the same

Abstract

The application discloses a tail gas exhaust pipe assembly and a vehicle with the same, the tail gas exhaust pipe assembly comprises: an exhaust pipe with an air inlet and an air outlet, and the exhaust pipe comprises a silencer pipe section and a water-gas separation pipe section between the air inlet and the air outlet, the silencer pipe section comprises at least two layers of silencer boards which are sequentially sleeved from inside to outside; wherein, the innermost silencer board of the at least two layers of silencer boards defines a gas flow channel which is communicated between the air inlet and the air outlet, and the silencer cavities are defined between the adjacent two layers of silencer boards, the silencer cavities are communicated with the gas flow channel, and the bottom of the outermost silencer board is provided with a drain port. The tail gas exhaust pipe assembly can reduce the noise generated by the stack structure when exhausting by using the silencer boards and the silencer cavities, thereby improving the riding comfort of the passengers, and the drain port arranged at the bottom of the outermost silencer board can avoid the water in the airflow from accumulating in the silencer pipe section.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to an exhaust pipe assembly and a vehicle having the same. Background Technology

[0002] In related technologies, hydrogen fuel cell vehicles powered by hydrogen energy primarily generate power through an electrochemical reaction in the fuel cell stack, where hydrogen and oxygen react to release electrons and produce water. However, the high-frequency noise from the air compressor in the fuel cell stack becomes the main noise source. Furthermore, the reaction efficiency within the stack cannot reach 100%. Along with water and water vapor, unreacted hydrogen, oxygen, and other unreacted gases are also discharged. Since hydrogen is an extremely reactive gas, it is highly flammable in air, potentially leading to explosions.

[0003] In existing technologies, the power of heavy-duty truck fuel cell stacks is generally between 110kW and 150kW. When the air compressor is running at full power, the exhaust tailpipe will generate high-frequency noise, which usually reaches more than 90dB. This makes it impossible to suppress the noise of the air compressor, reducing the NVH (noise, vibration and harshness) performance of the whole vehicle and reducing the ride comfort of the driver and passengers. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an exhaust pipe assembly that can reduce the noise generated by the fuel cell stack structure during exhaust by utilizing a muffler plate and a muffler cavity, thereby improving the ride comfort of the driver and passengers. At the same time, a drain outlet is provided at the bottom of the outermost muffler plate to prevent water in the airflow from accumulating in the muffler pipe section.

[0005] According to an embodiment of the present invention, an exhaust pipe assembly includes: an exhaust pipe having an inlet and an outlet, and the exhaust pipe including a muffler section and a water-gas separation section located between the inlet and the outlet, the muffler section including at least two muffler plates, the at least two muffler plates being arranged sequentially from the inside to the outside; wherein, the innermost muffler plate of the at least two muffler plates defines an airflow channel communicating between the inlet and the outlet, and a muffler cavity is defined between two adjacent muffler plates, the muffler cavity communicating with the airflow channel, and a drain outlet is provided at the bottom of the outermost muffler plate.

[0006] According to an embodiment of the present invention, the exhaust pipe assembly is provided with at least two layers of muffler plates in the muffler section, and a muffler cavity is formed between adjacent muffler plates. The muffler plates and the muffler cavity can reduce the noise generated by the fuel cell stack structure during exhaust, thereby improving the NVH performance of the whole vehicle and improving the ride comfort of the passengers. At the same time, a drain outlet is provided at the bottom of the outermost muffler plate so that water can be discharged directly from the drain outlet, thereby preventing water in the airflow from accumulating in the muffler section.

[0007] According to some embodiments of the exhaust pipe assembly of the present invention, the muffler includes a first muffler, a second muffler, and an outer layer plate disposed from the inside out. A first muffler cavity is defined between the first muffler and the second muffler and the first muffler cavity is filled with first muffler cotton. A second muffler cavity is defined between the second muffler and the outer layer plate and the second muffler cavity is filled with second muffler cotton. The first muffler cotton and / or the second muffler cotton form a drainage space at a position directly opposite the drain outlet along the radial direction of the airflow channel.

[0008] According to some embodiments of the present invention, the exhaust pipe assembly has a first muffler plate with a first muffler hole for communicating the airflow channel with the first muffler cavity, and a second muffler plate with a second muffler hole for communicating the first muffler cavity with the second muffler cavity. The first muffler hole and the second muffler hole are radially offset from each other in the airflow channel.

[0009] According to some embodiments of the exhaust pipe assembly of the present invention, the radial thickness of the first muffler is greater than the radial thickness of the second muffler.

[0010] According to some embodiments of the present invention, the exhaust pipe assembly is provided with a water-gas separation disc and a water outlet in the water-gas separation pipe section, the water-gas separation disc is provided with a diversion hole, and the water-gas separation disc is located upstream of the water outlet in the water-gas separation pipe section.

[0011] According to some embodiments of the present invention, the exhaust pipe assembly includes a water-gas separation pipe section comprising a diversion subsection and a drainage subsection, wherein the bottom wall of the drainage subsection is lower than the bottom wall of the diversion subsection, the water-gas separation disc is disposed within the diversion subsection, and the water outlet is disposed on the bottom wall of the drainage subsection.

[0012] According to some embodiments of the present invention, the exhaust pipe assembly includes a plurality of water-gas separators, which are spaced apart in the water-gas separator section along the airflow direction, and the diversion holes of two adjacent water-gas separators are staggered in the airflow direction.

[0013] According to some embodiments of the present invention, the exhaust pipe assembly has the muffler section located upstream of the water-gas separator section.

[0014] According to some embodiments of the present invention, the exhaust pipe assembly includes a bottom horizontal portion, a vertical portion, and a top horizontal portion. The bottom horizontal portion and the top horizontal portion are respectively connected to both ends of the vertical portion. The air inlet is located at one end of the bottom horizontal portion away from the vertical portion, and the air outlet is located at one end of the top horizontal portion away from the vertical portion. The muffler section and the water-gas separator section are integrated into the bottom horizontal portion. The bottom horizontal portion is adapted to be connected to the vehicle frame via a mounting bracket. The vertical portion is adapted to be connected to the gas cylinder frame. The top horizontal portion extends above the gas cylinder frame.

[0015] The present invention also proposes a vehicle.

[0016] The vehicle according to an embodiment of the present invention is provided with an exhaust pipe assembly as described in any of the above embodiments.

[0017] The advantages of the vehicle and the exhaust pipe assembly described above compared to the prior art are the same, and will not be repeated here.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of an exhaust pipe assembly according to some embodiments of the present invention;

[0021] Figure 2 This is a schematic diagram of the exhaust pipe assembly according to some embodiments of the present invention (from another perspective);

[0022] Figure 3 This is a cross-sectional view of a silencer pipe section according to some embodiments of the present invention;

[0023] Figure 4 This is a cross-sectional view of a water-air separation pipe section according to some embodiments of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of a water-air separation disc according to some embodiments of the present invention;

[0025] Figure 6 This is a schematic diagram showing the distribution of two water-air separation discs according to some embodiments of the present invention;

[0026] Figure 7This is an assembly diagram of an exhaust pipe assembly installed in a vehicle according to some embodiments of the present invention.

[0027] Figure label:

[0028] Exhaust pipe assembly 100, fuel cell stack structure 200, gas outlet 201, chassis 300, gas cylinder frame 400, hydrogen cylinder 401, mounting bracket 500, shock absorber pad 501, clamp bracket 600.

[0029] Exhaust pipe 10, bottom horizontal section 11, muffler section 111, drain outlet 111a, water-air separation section 112, diverter section 1121, drain section 1122, water outlet 1122a, support lug 113, vertical section 12, top horizontal section 13, air inlet 21, air outlet 22, muffler plate 30, first muffler plate 31, second muffler plate 32, outer plate 33, first sound-absorbing cotton 41, second sound-absorbing cotton 42, drainage space 43, airflow channel 50, water-air separation disc 60, diverter hole 61. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is for reference. Figures 1-7 The exhaust pipe assembly 100 according to an embodiment of the present invention is described.

[0032] According to an embodiment of the present invention, an exhaust pipe assembly 100 includes an exhaust pipe 10.

[0033] like Figure 1 and Figure 2 As shown, the exhaust pipe 10 has an air inlet 21 and an air outlet 22. In actual use, as... Figure 7 As shown, the air inlet 21 is connected to the gas outlet 201 of the fuel cell structure 200, so that the airflow discharged from the fuel cell structure 200 can enter the exhaust pipe 10 through the air inlet 21 and then be discharged into the air through the air outlet 22 of the exhaust pipe 10.

[0034] Therefore, the exhaust pipe 10 can promptly discharge the airflow from the fuel cell stack structure 200 into the air, thereby ensuring the stable operation of the fuel cell stack structure 200.

[0035] Specifically, such as Figure 1 As shown, the exhaust pipe 10 includes a muffler section 111 and a water-air separator section 112 located between the air inlet 21 and the air outlet 22.

[0036] For example, the silencer section 111 can be constructed as a silencer, and the silencer section 111 is used to reduce the noise generated when the fuel cell structure 200 exhausts. The water-gas separation section 112 can be constructed as a water-gas separator, and the water-gas separation section 112 is used to disperse the hydrogen in the gas flow discharged from the fuel cell structure 200 from other gases and water, thereby reducing the hydrogen concentration and avoiding safety problems caused by excessive hydrogen concentration.

[0037] It should be noted that in the existing technology, the fuel cell stack structure 200 generates noise when it is working. In particular, high-frequency noise is generated when the fuel cell stack structure 200 is running at full power. The existing exhaust tailpipe cannot suppress high-frequency noise, which reduces the NVH performance of the whole vehicle. Furthermore, the airflow discharged from the fuel cell stack structure 200 is a water-gas mixture, which contains water, unreacted hydrogen, oxygen and other unreacted gases. Since hydrogen is an extremely reactive gas, it is very easy for hydrogen to burn in the air and even explode, which reduces the safety of vehicle exhaust.

[0038] In this invention, the muffler section 111 and the water-gas separation section 112 are sequentially distributed in the direction of airflow. In other words, the airflow discharged from the fuel cell stack structure 200 flows sequentially through the muffler section 111 and the water-gas separation section 112, thereby facilitating the reduction of noise generated by the fuel cell stack structure 200 during exhaust through the muffler section 111, thus improving the NVH performance of the entire vehicle. Furthermore, the water-gas separation section 112 facilitates the dispersion of hydrogen in the airflow from other gases and water, thereby reducing the hydrogen concentration and improving the safety of vehicle exhaust.

[0039] Furthermore, such as Figure 3 As shown, the silencer section 111 includes at least two silencer plates 30, which are arranged sequentially from the inside to the outside. The innermost silencer plate 30 defines an airflow channel 50 that connects the air inlet 21 and the air outlet 22. A silencer cavity is defined between two adjacent silencer plates 30, and the silencer cavity is connected to the airflow channel 50. The bottom of the outermost silencer plate 30 is provided with a drain outlet 111a.

[0040] For example, the silencer section 111 may have two layers of silencer plates 30, or three layers of silencer plates 30. Of course, other numbers of silencer plates 30 may also be provided, which are not limited here.

[0041] It is understood that at least two layers of sound-absorbing plates 30 are arranged sequentially from the inside out, and the innermost layer of sound-absorbing plates 30 forms the sidewall of the airflow channel 50. Other sound-absorbing plates 30 are sequentially arranged on the radially outer side of the innermost layer of sound-absorbing plates 30. Adjacent layers of sound-absorbing plates 30 are spaced apart to define a sound-absorbing cavity between the two layers of sound-absorbing plates 30, and the sound-absorbing cavity is connected to the airflow channel 50.

[0042] Therefore, when the airflow discharged from the fuel cell stack structure 200 flows through the muffler section 111, the airflow flows along the airflow channel 50. At this time, the muffler plate 30 absorbs the noise generated when the fuel cell stack structure 200 is exhausted, and the noise generated when the fuel cell stack structure 200 is exhausted can enter the muffler cavity along the airflow channel 50 to further reduce the noise. Thus, the noise generated by the fuel cell stack structure 200 during exhaust is reduced by the muffler plate 30 and the muffler cavity, thereby improving the NVH performance of the whole vehicle.

[0043] In this configuration, the outermost sound-absorbing panel 30 has a drain outlet 111a at its bottom. Preferably, the drain outlet 111a is located at the lowest point of the outermost sound-absorbing panel 30.

[0044] It should be noted that when the airflow passes through the airflow channel 50, the airflow will collide with the muffler plate 30. At this time, the water in the airflow will fall to the lowest point of the outermost muffler plate 30 under its own gravity after hitting the muffler plate 30. In this invention, by setting a drain outlet 111a at the bottom of the outermost muffler plate 30, the water can be discharged directly from the drain outlet 111a, thereby preventing the water in the airflow from accumulating in the muffler pipe section 111, thus protecting the muffler pipe section 111 and extending its service life.

[0045] According to an embodiment of the present invention, the exhaust pipe assembly 100 provides at least two layers of muffler plates 30 in the muffler section 111 and forms a muffler cavity between adjacent muffler plates 30. This allows the muffler plates 30 and the muffler cavity to reduce the noise generated by the fuel cell stack structure 200 during exhaust, thereby improving the NVH performance of the vehicle and enhancing the ride comfort of the passengers. At the same time, a drain outlet 111a is provided at the bottom of the outermost muffler plate 30, allowing water to be discharged directly from the drain outlet 111a, thereby preventing water in the airflow from accumulating in the muffler section 111.

[0046] In some embodiments, such as Figure 3 As shown, the sound-absorbing plate 30 includes a first sound-absorbing plate 31, a second sound-absorbing plate 32, and an outer plate 33 arranged from the inside out. A first sound-absorbing cavity is defined between the first sound-absorbing plate 31 and the second sound-absorbing plate 32 and the first sound-absorbing cavity is filled with a first sound-absorbing cotton 41. A second sound-absorbing cavity is defined between the second sound-absorbing plate 32 and the outer plate 33 and the second sound-absorbing cavity is filled with a second sound-absorbing cotton 42.

[0047] Understandably, the first silencing plate 31 forms the sidewall of the airflow channel 50, the second silencing plate 32 is sleeved on the radial outer side of the first silencing plate 31, the first silencing cotton 41 is filled between the first silencing plate 31 and the second silencing plate 32, the outer layer plate 33 is sleeved on the radial outer side of the second silencing plate 32, and the second silencing cotton 42 is filled between the second silencing plate 32 and the outer layer plate 33.

[0048] Therefore, when the airflow passes through the airflow channel 50, the airflow enters the silencing cavity, which facilitates the absorption of noise generated during exhaust by the first silencing cotton 41 and the second silencing cotton 42, further enhancing the noise absorption effect of the silencing pipe section 111.

[0049] The first sound-absorbing cotton 41 and / or the second sound-absorbing cotton 42 form a drainage space 43 at a position directly opposite the drain outlet 111a along the radial direction of the airflow channel 50.

[0050] For example, the first sound-absorbing cotton 41 has a drainage space 43 formed at a position directly opposite to the drain outlet 111a along the airflow channel 50 in the radial direction; or the second sound-absorbing cotton 42 has a drainage space 43 formed at a position directly opposite to the drain outlet 111a along the airflow channel 50 in the radial direction; or both the first sound-absorbing cotton 41 and the second sound-absorbing cotton 42 have a drainage space 43 formed at a position directly opposite to the drain outlet 111a along the airflow channel 50 in the radial direction.

[0051] Preferably, such as Figure 3 As shown, the second sound-absorbing cotton 42 forms a drainage space 43 at a position directly opposite the drain outlet 111a along the radial direction of the airflow channel 50. In other words, the second sound-absorbing cotton 42 does not completely fill the sound-absorbing cavity between the second sound-absorbing plate 32 and the outer plate 33, so that when the airflow flows through the airflow channel 50, the airflow collides with the sound-absorbing plate 30. At this time, the water in the airflow will fall into the drainage space 43 under its own gravity after hitting the sound-absorbing plate 30, and then be discharged through the drain outlet 111a.

[0052] Therefore, by setting up a drainage space 43, water can fall into the drainage space 43 and be discharged directly from the drain outlet 111a, thereby preventing water in the airflow from accumulating in the silencer section 111, thus protecting the silencer section 111 and extending its service life.

[0053] Furthermore, the first silencing plate 31 is provided with a first silencing hole for connecting the airflow channel 50 with the first silencing cavity, and the second silencing plate 32 is provided with a second silencing hole for connecting the first silencing cavity with the second silencing cavity. The first silencing hole and the second silencing hole are staggered in the radial direction of the airflow channel 50.

[0054] Preferably, there are multiple first silencers and multiple second silencers. The diameters of the first silencers and the second silencers are different, and the first and second silencers are staggered in the radial direction of the airflow channel 50.

[0055] Therefore, when the airflow passes through the airflow channel 50, the airflow will flow sequentially to the first silencer hole and the second silencer hole, which facilitates the friction of the airflow through the first silencer hole and the second silencer hole, converting the energy of the noise into heat energy for dissipation. Furthermore, the first silencer hole and the second silencer hole are staggered in the radial direction of the airflow channel 50, so as to change the flow direction of the airflow after passing through the first silencer hole, thereby consuming the energy in the noise and further solving the problem of high-frequency noise generated by the fuel cell structure 200. At the same time, it is beneficial to reduce the water content in the airflow.

[0056] Optionally, such as Figure 3 As shown, the radial thickness of the first silencing plate 31 is greater than the radial thickness of the second silencing plate 32.

[0057] It is understandable that the first muffler 31 is formed as the sidewall of the airflow channel 50. It should be noted that when the airflow flows through the airflow channel 50, the impact force of the airflow on the first muffler 31 is greater than the impact force of the airflow on the second muffler 32.

[0058] Therefore, the radial thickness of the first muffler plate 31 is greater than that of the second muffler plate 32, which helps to prevent the impact force of airflow from damaging the first muffler plate 31, thereby protecting the first muffler plate 31 and extending its service life.

[0059] In some embodiments, such as Figure 4 As shown, the water-air separation pipe section 112 is equipped with a water-air separation plate 60 and a water outlet 1122a, as follows: Figure 5 As shown, the water-air separation plate 60 is provided with a diversion hole 61, and the water-air separation plate 60 is located upstream of the outlet 1122a in the water-air separation pipe section 112.

[0060] It is understandable that, such as Figure 5 As shown, the water-air separation plate 60 may be provided with multiple diversion holes 61, which are spaced apart on the water-air separation plate to ensure that the airflow can flow along the extension direction of the water-air separation pipe section 112. Preferably, the water-air separation plate 60 is located on the side near the air inlet 21 in the water-air separation pipe section 112, and the water outlet 1122a is located in the middle of the water-air separation pipe section 112. Preferably, the water outlet 1122a is located at the lowest point of the water-air separation pipe section 112.

[0061] Therefore, by setting up a water-gas separation disc 60 and a diversion hole 61 on the water-gas separation disc 60, the hydrogen in the airflow flowing through the water-gas separation pipe section 112 can be dispersed from other gases and water to fully mix the hydrogen with other gases, thereby reducing the hydrogen concentration. It can also form some water vapor to be discharged together, which helps to avoid safety problems caused by excessive hydrogen concentration and thus improves the safety of vehicle exhaust.

[0062] At the same time, the airflow rubs against the diversion hole 61 to convert the noise generated during exhaust into heat energy dissipation, which can further reduce the noise generated during exhaust.

[0063] Furthermore, such as Figure 4 As shown, the water-air separation pipe section 112 includes a diversion subsection 1121 and a drainage subsection 1122.

[0064] The bottom wall of the drainage section 1122 is lower than the bottom wall of the diversion section 1121. The water-air separation plate 60 is located inside the diversion section 1121, and the outlet 1122a is located on the bottom wall of the drainage section 1122.

[0065] It is understandable that the diversion section 1121 and the drainage section 1122 are arranged sequentially in the direction of airflow. In other words, the airflow first flows through the diversion section 1121 and then through the drainage section 1122, and the outlet 1122a is located at the lowest point of the bottom wall of the drainage section 1122.

[0066] When the airflow passes through the water-gas separation pipe section 112, the airflow first passes through the diversion sub-section 1121. At this time, the water-gas separation disk 60 in the diversion sub-section 1121 disperses the hydrogen in the airflow passing through the water-gas separation pipe section 112 with other gases and water, so that the water in the airflow is separated from other gases, and the hydrogen can be fully mixed with other gases, thereby reducing the hydrogen concentration, and some water can be formed into water vapor for discharge.

[0067] Next, the separated water falls to the bottom wall of the diversion section 1121 under its own gravity, and then flows along the bottom wall of the diversion section 1121 to the bottom wall of the drainage section 1122. Then the dispersed gas flows through the upper space in the drainage section 1122, while the dispersed water gathers at the lowest point of the bottom wall of the drainage section 1122, and then the water flows out through the outlet 1122a.

[0068] Therefore, by setting up a diversion section 1121 and a drainage section 1122, and by setting up a water-gas separation plate 60 and a water outlet 1122a in the diversion section 1121 and the drainage section 1122 respectively, hydrogen in the airflow can be dispersed from other gases and water, which helps to reduce the hydrogen concentration, thereby avoiding safety problems caused by excessive hydrogen concentration and improving the safety of vehicle exhaust.

[0069] Optionally, there are multiple water-air separation discs 60, which are distributed at intervals in the water-air separation pipe section 112 along the airflow direction, and the diversion holes 61 of two adjacent water-air separation discs 60 are staggered in the airflow direction.

[0070] For example, such as Figure 4 As shown, there are two water-gas separation discs 60, which are spaced apart along the airflow direction within the water-gas separation pipe section 112, and as... Figure 6 As shown, the flow dividers 61 of the two water-air separation discs 60 are staggered in the airflow direction.

[0071] Therefore, when the airflow passes through the water-gas separation pipe section 112, the airflow will flow sequentially to the diversion holes 61 of the two water-gas separation discs 60, so that the friction of the airflow through the diversion holes 61 of the two water-gas separation discs 60 can convert the energy of noise into heat energy for dissipation. Moreover, the diversion holes 61 of the two water-gas separation discs 60 are staggered in the airflow direction, so as to change the flow direction of the airflow after passing through one water-gas separation disc 60, so as to consume the energy in the noise, further solve the problem of high-frequency noise generated by the fuel cell stack structure 200, and at the same time, it helps to reduce the water content in the airflow.

[0072] In some embodiments, such as Figure 1 As shown, the silencer section 111 is located upstream of the water-gas separation section 112. In other words, the silencer section 111 and the water-gas separation section 112 are distributed sequentially in the airflow direction.

[0073] Preferably, the muffler section 111 and the water-gas separation section 112 are connected sequentially in the airflow direction, so that the noise generated during exhaust can be absorbed first through the muffler section 111, and then the hydrogen in the airflow can be dispersed with other gases and water through the water-gas separation section 112 to fully mix the hydrogen with other gases, thereby reducing the hydrogen concentration. It can also form some water vapor to be discharged together, which helps to avoid safety problems caused by excessive hydrogen concentration, thereby improving the safety of vehicle exhaust.

[0074] In some embodiments, such as Figure 2 As shown, the exhaust pipe 10 includes a bottom horizontal portion 11, a vertical portion 12, and a top horizontal portion 13, which are connected in sequence.

[0075] Specifically, such as Figure 2 As shown, the bottom horizontal portion 11 and the top horizontal portion 13 are respectively connected to the two ends of the vertical portion 12. The air inlet 21 is located at the end of the bottom horizontal portion 11 away from the vertical portion 12, and the air outlet 22 is located at the end of the top horizontal portion 13 away from the vertical portion 12.

[0076] Among them, such as Figure 1As shown, the silencer section 111 and the water-gas separation section 112 are integrated into the bottom horizontal part 11, which makes it easier to reduce the difficulty of setting up the silencer section 111 and the water-gas separation section 112, and helps to reduce production costs. Moreover, the exhaust gas emission pipe assembly 100 with such a configuration has a simple structure, which helps to reduce production costs.

[0077] Preferably, such as Figure 7 As shown, the bottom horizontal portion 11 is adapted to be connected to the vehicle frame 300 via the mounting bracket 500, the vertical portion 12 is adapted to be connected to the gas cylinder frame 400, and the top horizontal portion 13 extends above the gas cylinder frame 400.

[0078] For example, when the exhaust pipe assembly 100 is installed on a vehicle, the bottom horizontal portion 11 is detachably connected to the frame 300, the vertical portion 12 extends along the height direction of the gas cylinder frame 400 and is detachably connected to the gas cylinder frame 400, the gas cylinder frame 400 is provided with a hydrogen cylinder 401, the top horizontal portion 13 extends above the gas cylinder frame 400 and protrudes from the roof, and the exhaust port 22 is located at the end of the top horizontal portion 13 away from the vertical portion 12.

[0079] In other words, the height of the air outlet 22 is higher than the height of the roof. Preferably, the top horizontal portion 13 extends toward the rear of the vehicle, for example, the top horizontal portion 13 extends toward the left side near the rear of the vehicle, that is, the air outlet 22 exhausts air toward the left side near the rear of the vehicle, or the top horizontal portion 13 extends toward the right side near the rear of the vehicle, that is, the air outlet 22 exhausts air toward the right side near the rear of the vehicle.

[0080] Of course, the extension direction of the top horizontal part 13 can also be other directions, that is, the exhaust direction of the air outlet 22 can be other directions, which is not limited here.

[0081] Optionally, the muffler section 111 in the bottom horizontal portion 11 is provided with a support lug 113, and the support lug 113 is detachably connected to the frame 300 via a mounting bracket 500, which helps to enhance the structural stability of the bottom horizontal portion 11. A shock-absorbing pad 501 is provided between the mounting bracket 500 and the muffler section 111, thereby preventing the muffler section 111 from transmitting noise to the frame 300, thus improving the riding comfort of the driver and passengers. The vertical portion 12 is detachably connected to the gas cylinder frame 400 via multiple clamp brackets 600. The multiple clamp brackets 600 are spaced apart, which makes it easier to reduce the connection difficulty between the vertical portion 12 and the gas cylinder frame 400, and helps to enhance the structural stability of the vertical portion 12. The top horizontal portion 13 can be fixed to the top of the gas cylinder frame 400 by a fixing structure, thereby enhancing the structural stability of the top horizontal portion 13, and thus enhancing the gas outlet stability of the gas outlet 22.

[0082] It should be noted that in existing technologies, exhaust tailpipes are typically located in the lower middle part of the chassis, and the exhaust pipes face downwards towards the bottom. This causes water, water vapor, and unreacted gases produced after the fuel cell stack 200 reaction to be discharged at very high speeds. When these gases encounter dusty road surfaces, they can blow onto the ground, creating dust and causing air pollution. At the same time, hydrogen has a low density and generally moves upwards. Since the exhaust tailpipe is located under the vehicle body, and hydrogen has extremely strong diffusivity, if the driver opens the door during the hydrogen's ascent, hydrogen may enter the passenger compartment, or it may accumulate in a certain space within the vehicle during its ascent. If the concentration reaches 4% or higher, there is a risk of explosion, reducing the safety of vehicle exhaust.

[0083] Therefore, in this invention, by setting a bottom horizontal portion 11, a vertical portion 12, and a top horizontal portion 13, the exhaust port 22 is located above the vehicle roof. This avoids environmental problems such as dust pollution and road mud pollution caused by high-speed water, water vapor, and unreacted gas discharged from the exhaust pipe 10 blowing onto the ground. At the same time, after the water vapor mixture containing hydrogen is discharged from the exhaust port 22, the hydrogen can diffuse and rise directly above the vehicle roof, thereby preventing hydrogen from accumulating near the vehicle body and avoiding safety problems such as explosion caused by hydrogen accumulation, thus improving the safety of vehicle exhaust.

[0084] By setting the vertical section 12, when the airflow flows along the vertical section 12, the water in the airflow can fall under its own gravity and fall back to the lowest point of the bottom wall of the drainage section 1122. Then the water flows out through the outlet 1122a, which facilitates the further separation of water and gas in the airflow through the vertical section 12.

[0085] The present invention also proposes a vehicle. Preferably, the vehicle is a hydrogen fuel cell vehicle, but of course, the vehicle may also be other types of vehicles, which are not limited here.

[0086] The vehicle according to an embodiment of the present invention is provided with an exhaust pipe assembly 100 as described in any of the above embodiments.

[0087] According to an embodiment of the present invention, the exhaust pipe assembly 100 of the vehicle has at least two layers of muffler plates 30 provided in the muffler pipe section 111, and a muffler cavity is formed between adjacent muffler plates 30. The muffler plates 30 and the muffler cavity can reduce the noise generated by the fuel cell stack structure 200 during exhaust, thereby improving the NVH performance of the whole vehicle and improving the ride comfort of the driver and passengers.

[0088] Meanwhile, a drain outlet 111a is provided at the bottom of the outermost muffler plate 30, so that water can be discharged directly from the drain outlet 111a, thereby preventing water in the airflow from accumulating in the muffler pipe section 111. The exhaust outlet 22 is located above the roof of the vehicle, which can avoid environmental problems such as dust pollution and road mud pollution, as well as prevent hydrogen from accumulating near the vehicle body, thereby avoiding safety problems such as hydrogen accumulation causing explosions, and thus improving the safety of vehicle exhaust.

[0089] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0090] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these 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 tail gas emission pipe assembly (100), characterized in that, include: An exhaust pipe (10) has an air inlet (21) and an air outlet (22), and the exhaust pipe (10) includes a muffler section (111) and a water-air separation section (112) located between the air inlet (21) and the air outlet (22). The muffler section (111) includes at least two layers of muffler plates (30), which are arranged sequentially from the inside to the outside. At least two layers of the silencing plates (30) define an airflow channel (50) in the innermost silencing plate (30) that connects the air inlet (21) and the air outlet (22), and define a silencing cavity between two adjacent silencing plates (30) that connects to the airflow channel (50), and provide a drain outlet (111a) at the bottom of the outermost silencing plate (30); The water-gas separation pipe section (112) is provided with a water-gas separation plate (60) and a water outlet (1122a). The water-gas separation plate (60) is provided with a diversion hole (61). The water-gas separation plate (60) is located upstream of the water outlet (1122a) in the water-gas separation pipe section (112).

2. The exhaust pipe assembly (100) according to claim 1, characterized in that, The sound-absorbing plate (30) includes a first sound-absorbing plate (31), a second sound-absorbing plate (32), and an outer layer plate (33) arranged from the inside out. A first sound-absorbing cavity is defined between the first sound-absorbing plate (31) and the second sound-absorbing plate (32), and a first sound-absorbing cotton (41) is filled in the first sound-absorbing cavity. A second sound-absorbing cavity is defined between the second sound-absorbing plate (32) and the outer layer plate (33), and a second sound-absorbing cotton (42) is filled in the second sound-absorbing cavity. The first sound-absorbing cotton (41) and / or the second sound-absorbing cotton (42) form a drainage space (43) at a position directly opposite the drain outlet (111a) in the radial direction along the airflow channel (50).

3. The exhaust pipe assembly (100) according to claim 2, characterized in that, The first silencing plate (31) is provided with a first silencing hole for communicating the airflow channel (50) with the first silencing cavity, and the second silencing plate (32) is provided with a second silencing hole for communicating the first silencing cavity with the second silencing cavity. The first silencing hole and the second silencing hole are staggered in the radial direction of the airflow channel (50).

4. The exhaust pipe assembly (100) according to claim 2, characterized in that, The radial thickness of the first silencing plate (31) is greater than the radial thickness of the second silencing plate (32).

5. The exhaust pipe assembly (100) according to claim 1, characterized in that, The water-air separation pipe section (112) includes a diversion subsection (1121) and a drainage subsection (1122). The bottom wall of the drainage subsection (1122) is lower than the bottom wall of the diversion subsection (1121). The water-air separation plate (60) is located in the diversion subsection (1121), and the outlet (1122a) is located on the bottom wall of the drainage subsection (1122).

6. The exhaust pipe assembly (100) according to claim 1, characterized in that, There are multiple water-gas separation discs (60), which are spaced apart in the water-gas separation pipe section (112) along the airflow direction, and the diversion holes (61) of two adjacent water-gas separation discs (60) are staggered in the airflow direction.

7. The exhaust pipe assembly (100) according to any one of claims 1-4, characterized in that, The silencer section (111) is located upstream of the water-gas separation section (112).

8. The exhaust pipe assembly (100) according to any one of claims 1-4, characterized in that, The exhaust pipe (10) includes a bottom horizontal portion (11), a vertical portion (12), and a top horizontal portion (13). The bottom horizontal portion (11) and the top horizontal portion (13) are respectively connected to both ends of the vertical portion (12). The air inlet (21) is located at one end of the bottom horizontal portion (11) away from the vertical portion (12), and the air outlet (22) is located at one end of the top horizontal portion (13) away from the vertical portion (12). The silencer section (111) and the water-gas separation section (112) are integrated into the bottom horizontal portion (11), which is adapted to be connected to the vehicle frame (300) via a mounting bracket (500), the vertical portion (12) is adapted to be connected to the gas cylinder frame (400), and the top horizontal portion (13) extends above the gas cylinder frame (400).

9. A vehicle, characterized in that, Includes the exhaust pipe assembly (100) according to any one of claims 1-8.

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